CN211019318U

CN211019318U - High-power L ED lighting device and power module for driving same

Info

Publication number: CN211019318U
Application number: CN201822047769.5U
Authority: CN
Inventors: 熊爱明; 周林
Original assignee: Jiaxing Super Lighting Electric Appliance Co Ltd
Current assignee: Jiaxing Super Lighting Electric Appliance Co Ltd
Priority date: 2017-12-08
Filing date: 2018-12-07
Publication date: 2020-07-14
Anticipated expiration: 2028-12-07
Also published as: CN207766603U

Abstract

The application discloses a high-power L ED lighting device and a power module for driving the same, wherein the high-power L ED lighting device comprises a L ED light source, a first rectifying circuit for converting an alternating current driving signal into a rectified signal, a filter circuit for converting the rectified signal into a filtered signal, a power conversion circuit for converting the filtered signal into an output power source capable of lighting a L ED light source, and an active bias generation circuit capable of reducing the voltage of the alternating current driving signal into a working voltage of the power conversion circuit.

Description

High-power L ED lighting device and power module for driving same

Technical Field

The application relates to the field of lighting equipment, in particular to a high-power L ED lighting device and a power module thereof.

Background

However, under the application of a High-power L ED lighting device (HID-L ED, High intensity Discharge-L ED), the bias circuit is usually configured with a large capacitor to avoid excessive power waste, so that the HID-L ED is slow to light up, and the start speed of the bias mode is about 1 second, which affects the use experience.

In addition, in practical applications, it is desirable for the power module to be able to monitor and control L ED light sources or external operating parameters, such as temperature control or light compensation of L ED loads, in addition to driving L ED light sources, and to make the power module universal.

SUMMERY OF THE UTILITY MODEL

In a first aspect, an embodiment of the present application provides a power module for driving a high power L ED lighting device, which includes a first rectifying circuit receiving an ac driving signal to generate a rectified signal, a filtering circuit receiving the rectified signal to generate a filtered signal, a power conversion circuit performing power conversion according to the filtered signal to generate an output power to illuminate a L ED light source in the high power L ED lighting device, and an active bias generation circuit receiving the ac driving signal to generate an operating voltage, wherein the power conversion circuit operates with the operating voltage as a power source, and a level of the operating voltage is lower than a level of a voltage of the output power.

In the foregoing scheme, optionally, the power module further includes a power factor correction circuit, which receives the filtered signal to generate a correction signal, so as to increase a power factor of the power module, wherein the power conversion circuit performs power conversion on the correction signal to generate the output power to light the L ED light source, and the power factor correction circuit operates with the operating voltage as a power supply.

In the above solution, optionally, the power module further includes a power adjustment circuit, which generates a duty ratio adjustment signal to adjust an output power of the power conversion circuit according to at least one of an operating temperature of the high-power L ED lighting device, a brightness of the L ED light source, an input power of the high-power L ED lighting device, a human touch action, or whether a person approaches the lighting device.

In the foregoing solution, optionally, the power supply adjusting circuit operates with the operating voltage as a power supply.

In the foregoing solution, optionally, the power supply adjusting circuit generates the duty ratio adjusting signal at least according to the operating temperature.

In the foregoing scheme, optionally, the power supply adjustment circuit further generates the duty ratio adjustment signal according to a voltage of the input power supply.

In the foregoing solution, optionally, a level of the voltage of the output power supply is between 10 times and 100 times a level of the operating voltage.

In the foregoing scheme, optionally, the rise time of the voltage of the output power supply is 10 times to 100 times of the rise time of the operating voltage; or the output power of the power conversion circuit is between 100 times and 1000 times of the output power of the active bias generation circuit.

In the foregoing scheme, optionally, the first rectification circuit, the filter circuit and the power conversion circuit supply power to the L ED light source through a power supply loop, and the working voltage does not get power from the power supply loop.

In another aspect, an embodiment of the present invention provides a power module for driving a high power L ED lighting device, including a power conversion circuit configured to perform power conversion according to an input power to generate an output power to illuminate a L ED light source of the high power L ED lighting device, an active bias generation circuit configured to receive an ac driving signal to generate a working voltage, wherein the power conversion circuit operates with the working voltage as a power source, and a power adjustment circuit coupled to the power conversion circuit and the active bias generation circuit, wherein the power adjustment circuit generates a duty ratio adjustment signal according to at least one of the following working parameters to adjust an output power of the power conversion circuit, wherein the input power, the working temperature or the brightness of the L ED light source of the high power L ED lighting device, an artificial touch operation, or whether a person approaches the light source, and wherein the power adjustment circuit operates with the working voltage as the power source.

In the foregoing solution, optionally, the power supply adjusting circuit includes a first detecting circuit configured to detect a first operating parameter of the L ED light source to obtain a first detection signal, and a first signal processing circuit configured to generate a first duty ratio adjusting signal according to the first detection signal, where the duty ratio adjusting signal is related to the first duty ratio adjusting signal.

In the foregoing scheme, optionally, the active bias generation circuit further generates a delayed operating voltage, wherein the first detection circuit operates with the delayed operating voltage as a power supply.

In the foregoing solution, optionally, the active bias generating circuit includes: a delay switch circuit for generating the delayed operating voltage according to the operating voltage, the delay switch circuit comprising: a transistor having a first terminal coupled to the operating voltage and a second terminal for generating the delayed operating voltage; a resistor coupled between the first terminal of the transistor and the control terminal of the transistor; and the capacitor is coupled between the delayed working voltage and the grounding point.

In the foregoing solution, optionally, the first operating parameter is a temperature associated with the L ED light source, the first detecting circuit is a temperature sensor for detecting the temperature associated with the L ED light source, and the first signal processing circuit is a temperature compensation circuit, wherein the temperature sensor operates with the delayed operating voltage as a power supply.

In the foregoing solution, optionally, the power supply adjusting circuit further includes: the second detection circuit is used for monitoring the input information parameters to generate a second detection signal; the second signal processing circuit is configured to generate a second duty cycle adjustment signal according to the second detection signal, wherein the duty cycle adjustment signal is further related to the second duty cycle adjustment signal.

In the foregoing scheme, optionally, the first signal processing circuit and the second signal processing circuit adopt a shunt connection method (shunt), so that the power conversion circuit receives the first duty ratio adjustment signal and the second duty ratio adjustment signal at a single endpoint to obtain the duty ratio adjustment signal.

In the foregoing scheme, optionally, when the input information parameter does not exceed a preset voltage threshold, the second signal processing circuit adjusts the amplitude of the duty ratio adjustment signal to a first level; and when the input information parameter exceeds the preset voltage threshold, the second signal processing circuit adjusts the amplitude of the duty ratio adjusting signal to a second level.

In the foregoing solution, optionally, the output power of the power conversion circuit in response to the second level is lower than the output power of the power conversion circuit in response to the first level.

In the foregoing scheme, optionally, the input information parameter is an input power supply, and the second detection circuit is configured to receive the input power supply and determine whether an amplitude of the input power supply is greater than a preset voltage threshold to generate the second detection signal; the second signal processing circuit comprises a switch and a divider resistor, the switch and the divider resistor are connected in series between the output end of the first signal processing circuit and a ground end, and a control end of the switch receives the second detection signal, wherein the second detection signal controls the switch to be turned off in response to the input power supply being less than or equal to the preset voltage threshold, so that the amplitude of the duty ratio adjustment signal is adjusted to the first level; and in response to the input power supply being greater than the preset voltage threshold, the second detection signal controls the switch to be turned on, so that the amplitude of the duty ratio adjustment signal is adjusted to the second level.

In the foregoing scheme, optionally, the power module further includes: the rectifying circuit receives the alternating current driving signal to generate a rectified signal; a filter circuit receiving the rectified signal to generate a filtered signal; the power factor correction circuit receives the filtered signal to generate a correction signal so as to improve the power factor of the power supply module; wherein the input power is the AC drive signal, the rectified signal, the filtered signal, or the correction signal.

In the foregoing solution, optionally, the second detection circuit is a human body detection sensor, and is configured to detect whether a human body exists in an external environment, so as to obtain the second detection signal; the second signal processing circuit comprises a switch and a divider resistor, the switch and the divider resistor are connected in series between the output end and the grounding end of the first signal processing circuit, and the control end of the switch receives the second detection signal, wherein when the second detection signal indicates that no human body exists in the external environment, the second detection signal controls the switch to be switched off so that the amplitude of the duty ratio adjusting signal is adjusted to the first level; and when the second detection signal indicates that a human body exists in the external environment, the second detection signal controls the switch to be switched on, so that the amplitude of the duty ratio adjusting signal is adjusted to the second level.

In the foregoing solution, optionally, the power module is characterized by one of the following: (1) the human body detection sensor is a sound sensor, and the input information parameters correspond to sound emitted by human body actions; (2) the human body detection sensor is a light sensor, and the input information parameter corresponds to the shading of the light sensor by a human body; or (3) the human body detection sensor is an infrared sensor, and the input information parameter corresponds to the blocking of the human body on an infrared signal or an infrared signal sent by the human body; to detect the presence of a human body.

In another aspect, the present disclosure also provides a high power L ED lighting device, which includes a L ED light source, and the power module mentioned in any of the above alternative embodiments for generating the output power to illuminate the L ED light source.

In addition, the high-power L ED lighting device and the power module thereof provided by the application can monitor and regulate L ED light sources or external working parameters, for example, temperature control or light compensation can be performed on L ED loads, and the high-power L ED lighting device and the power module thereof have universality.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic circuit block diagram of a high power L ED lighting device according to a first embodiment of the present application;

fig. 2 is a schematic circuit architecture diagram of a first rectifying circuit and a filtering circuit according to an embodiment of the present application;

FIG. 3A is a block diagram of a power conversion circuit according to a first embodiment of the present application;

FIG. 3B is a block diagram of another aspect of a power conversion circuit according to the first embodiment of the present application;

FIG. 4 is a block diagram of a power factor correction circuit and a power conversion circuit according to an embodiment of the present disclosure;

FIG. 5 is a schematic circuit diagram of a power factor correction circuit according to an embodiment of the present application;

FIG. 6 is a schematic circuit diagram of a power conversion circuit according to an embodiment of the present application;

FIG. 7 is a schematic circuit diagram of an active bias generation circuit according to a first embodiment of the present application;

FIG. 8 is a schematic circuit diagram of an active bias generation circuit according to a second embodiment of the present application;

FIG. 9 is a block diagram of a power regulation circuit according to a first embodiment of the present application;

FIG. 10 is a schematic circuit diagram of a temperature detection circuit according to a first embodiment of the present application;

FIG. 11 is a schematic circuit diagram of a temperature compensation circuit according to a second embodiment of the present application;

FIG. 12A is a block diagram of a power regulation circuit according to a second embodiment of the present application;

FIG. 12B is a block diagram of a power regulation circuit according to a third embodiment of the present application;

FIG. 13A is a block diagram of a second detecting circuit and a second signal processing circuit according to the first embodiment of the present application;

FIG. 13B is a block diagram of a second detection circuit and a second signal processing circuit according to a second embodiment of the present application;

fig. 14 is a schematic circuit block diagram of a high power L ED lighting device according to a second embodiment of the present application;

FIG. 15 is a circuit diagram of an input circuit according to an embodiment of the present application;

FIG. 16A is a schematic block diagram of a power module according to a first embodiment of the present application; and

fig. 16B is a circuit block diagram of a power module according to a second embodiment of the present application.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments in the present application, shall fall within the scope of protection of the present invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, fig. 1 is a schematic circuit block diagram of a high power L ED lighting device 10 according to a first embodiment of the present disclosure, in which the high power L ED lighting device 10 includes an input terminal ACN for receiving an AC driving signal ACin, an AC L, a first rectifying circuit 100, a filter circuit 200, a power conversion circuit 400, a L ED light source 500, an active bias generation circuit 600, and a power adjustment circuit 700.

The first rectifying circuit 100 is configured to convert the ac driving signal ACin into a rectified signal. The rectifying circuit may be of a full-wave bridge rectifier or a half-wave bridge rectifier, for example.

The filter circuit 200 is coupled to the first rectifying circuit 100 and is used for converting the rectified signal into a filtered signal, wherein the type of the filter circuit may be, for example, active filtering (the circuit components include active devices) or passive filtering (the circuit components include only passive devices), and wherein the passive filtering may be implemented by an architecture such as capacitive filtering, inductive filtering, or complex filtering, and the complex filtering includes L type, L C filtering, L C pi type filtering, RC pi type filtering, and the like.

The power conversion circuit 400 is coupled to the filter circuit 200, and is configured to convert the filtered signal into an output power Vout capable of lighting L ED light source 500, wherein the output power of the power conversion circuit 400 may be greater than or equal to 30W in a high power L ED lighting application, wherein the type of the power conversion circuit may be a buck conversion circuit, a boost conversion circuit, a buck-boost conversion circuit, or a flyback conversion circuit, for example, in a non-limiting example, the power conversion circuit may be a buck conversion circuit that converts 600V to 450V, and the first rectification circuit 100, the filter circuit 200, and the power conversion circuit 400 supply power to the L ED light source 500 through a power loop.

The active bias generation circuit 600 is connected to the input terminals ACN and AC L through the

input terminals

101 and 102 to step down the AC driving signal ACin to form a desired operating voltage VCC for the power conversion circuit 400 and the power regulation circuit 700. the active bias generation circuit 600 may be similar in configuration to the power conversion circuit 400, but the output voltage generated by the active bias generation circuit 600 is relatively low, for example, VCC may be, for example, equal to 5V. in other words, there may be a 10-100 times difference between the output voltage of the active bias generation circuit 600 and the output voltage of the power conversion circuit 400. in some embodiments, the output voltage of the power conversion circuit 400 (i.e., the voltage of the output power Vout) is 90 times that of the active bias generation circuit 600 (i.e., the difference between 450V and 5V).

The power adjustment circuit 700 is coupled to the power conversion circuit 400 and the active bias generation circuit 600, and generates the duty ratio adjustment signal PWMAdj according to the operating environment factors, such as the operating temperature of the high power L ED lighting device 10, the brightness of the L ED light source 500, the human touch action or whether someone is approaching, and the like, so as to adjust the output power of the power conversion circuit 400.

In the present embodiment, the active bias generation circuit 600 steps down the ac driving signal ACin to form the operating voltage VCC of the power conversion circuit 400, so as to provide the operating voltage VCC for the power conversion circuit 400, so that the power conversion circuit 400 can operate, and generate the output power Vout to light the L ED light source 500. it should be noted that, in general, there is a very high input capacitance in the power loop of the high-power L ED lighting device, therefore, in the prior art that the operating voltage VCC is taken from the power loop, the starting speed of the high-power L ED lighting device is slow, and relatively speaking, the high-power L ED lighting device 10 of the present application utilizes the active bias generation circuit 600 to perform power conversion on the ac driving signal ACin inputted from the outside in an active power conversion manner, rather than taking power from the power loop, so as to quickly form the operating voltage VCC required by the power conversion circuit 400, and further effectively increase the starting speed of the high-power L ED lighting device 10.

In some embodiments, the operating voltage VCC required by the power conversion circuit 400 can be formed in 10ms to 100ms, in other words, there is a gap between the rising time of the operating voltage VCC and the rising time of the output voltage of the power conversion circuit 400 by a factor of 10 to 100. In addition, in some embodiments, the output power Vout of the power converter circuit 400 can reach 100W to 200W, and the working voltage VCC provided by the active bias generation circuit 600 only needs to supply 5mW to 50mW, in other words, the output power of the power converter circuit can be 100 times to 1000 times of the output power of the active bias generation circuit.

As described above, as shown in fig. 1, the input terminals may be two pins of the high power L ED lighting device 10, the AC driving signal ACin is input through the input terminals AC L and ACN, the AC driving signal ACin may be an AC mains input of 120V or 227V, but may also be an AC signal with other voltage values, depending on the grid specification defined in different countries/regions.

Moreover, to reduce the effect of harmonics on the circuit characteristics and reduce the conversion loss, in some embodiments, the high power L ED lighting device 10 may further include a power factor correction circuit 300 disposed between the power conversion circuit 400 and the filter circuit 200 and connected to the output terminal of the active bias generation circuit 600 to receive the operating voltage vcc provided by the active bias generation circuit 600, wherein the power factor correction circuit 300 is capable of boosting the power factor of the filtered signal by adjusting the signal characteristics (such as phase, level, or frequency) of the filtered signal to generate a power factor corrected filtered signal (hereinafter referred to as a correction signal).

The following is an illustration of specific embodiments of the various circuit modules of the high power L ED lighting device 10, respectively.

Referring to fig. 2, fig. 2 is a schematic circuit architecture diagram of a first rectifying circuit and a filter circuit according to an embodiment of the present disclosure, the first rectifying circuit 100 includes diodes D103, D104, D105, and D106, the first rectifying circuit 100 is coupled to the input terminals ACN and AC L through the

input terminals

101 and 102 to receive the AC driving signal ACin, and performs full-wave rectification on the AC driving signal ACin to generate a rectified signal.

Specifically, as shown in fig. 2, the anode of the diode D101 and the anode of the diode D103 are electrically connected to the connection terminal 202 of the filter circuit 200, the cathodes of the diodes D101 and D103 are electrically connected to the anodes of the diodes D102 and D104, respectively, the cathodes of the diodes D102 and D104 are electrically connected to the connection terminal 201 of the filter circuit 200, the connection point of the diode D101 and the diode D102 is electrically connected to the input terminal AC L, and the connection point of the diode D103 and the diode D104 is electrically connected to the input terminal ACN.

In addition, the first rectifier circuit 100 may be a full-wave rectifier circuit or a half-wave rectifier circuit of other types without affecting the intended function of the present embodiment.

In the present embodiment, the filter circuit 200 includes capacitors C201 and C202 and an inductor L201, a first terminal of the capacitor C201 and a first terminal of the inductor L201 are coupled to the connection terminal 201 of the filter circuit 200, a second terminal of the inductor L201 and a first terminal of the capacitor C202 are coupled to the connection terminal 301 of the filter circuit 200, and a second terminal of the capacitor C201 and a second terminal of the capacitor C202 are coupled to the connection terminal 202 of the filter circuit 200, wherein the capacitors C201 and C202 and the inductor L201 form a pi-type filter, and therefore, in the present embodiment, the connection terminal 202 and the connection terminal 302 are directly electrically connected to each other.

Referring to fig. 3A, fig. 3A is a schematic circuit block diagram of a power conversion circuit according to a first embodiment of the present application, and as shown in fig. 3A, the power conversion circuit 400 receives power provided by a front stage through two

connection terminals

401 and 402, and is coupled to an L ED light source 500 through two

output terminals

501 and 502.

In the embodiment, the power conversion circuit 400 includes a switching power conversion circuit 410 and a first controller 420, the switching power conversion circuit (or simply referred to as a switching power supply) 410 performs power conversion on the power received from the previous stage to obtain an output power Vout, which is used to drive/light the L ED light source 500. in a specific implementation, the signal received by the power conversion circuit 400 may be an ac signal or a dc signal, which is not particularly limited in this embodiment, the output power Vout may be, for example, a dc signal, and is used to drive the L ED light source 500. generally, the L ED light source 500 is a current type driving device, so that the magnitude of the current or the magnitude of the output power Vout should be sufficient to drive the L ED light source 500 to normally operate while the output power Vout satisfies the rated driving voltage of the L ED light source 500. in some embodiments, the first controller 420 may make the magnitude of the current or the magnitude of the output power Vout substantially consistent under different input power sources, and further make the light the ED light source 500 substantially consistent in brightness when lighting L.

As will be understood by those skilled in the art, the switching power converter circuit 410 generally includes a main switch (typically a power switch transistor), an energy storage element (typically an inductor), and a synchronous switch (typically a switch transistor or a diode). The main switch is turned on or off under the control of a pulse-width modulation (PWM) signal PWM1, so that the energy storage device can repeatedly charge and discharge energy in response to the on or off of the main switch to generate a stable output power Vout, wherein the duty ratio of the PWM signal PWM1 determines the magnitude of the output power Vout output by the switching power conversion circuit 410. For simplicity, further description of the operation principle of the switching power converter circuit 410 is omitted.

The first controller 420 is coupled to the switching power converter circuit 410, and the operating voltage VCC required by the first controller 420 is provided by the active bias voltage generating circuit 600. In addition, the first controller 420 is adapted to adjust the duty ratio of the output PWM signal PWM1 according to the duty ratio adjustment signal PWMAdj, for example, the duty ratio of the PWM signal PWM1 may be proportional to the amplitude of the duty ratio adjustment signal PWMAdj, but is not limited thereto, and the duty ratio of the PWM signal PWM1 may also be in inverse proportion to the variation of the duty ratio adjustment signal PWMAdj in another embodiment. Further, the PWM signal PWM1 is transmitted to the switching power converter circuit 410, so that the switching power converter circuit 410 responds to the PWM signal PWM1 to charge/discharge the energy, that is, the PWM signal PWM1 controls the energy storage device therein to charge/discharge the energy, so as to generate the output power Vout. It should be noted that, if the signal is a voltage signal, the amplitude of the signal is the level of the voltage signal; if the signal is a current signal, the amplitude of the signal is the magnitude of the current value of the current signal.

In the present embodiment, the duty ratio of the PWM signal PWM1 is proportional to the output power of the switching power converter circuit 410 (i.e., proportional to the power of the output power Vout), and the operating parameter is inversely related to the power of the output power Vout, where the power of the output power Vout is the actual output power of the switching power converter circuit 410, and is equal to the product of the actual effective voltage of the output power Vout and the actual effective current thereof, for example, the temperature of the L ED light source 500 is higher, the power of the output power Vout is smaller, so that the temperature of the L ED light source 500 is reduced, specifically, when the temperature of the L ED light source 500 is increased, the amplitude of the duty ratio adjustment signal PWMAdj is increased, so that the duty ratio of the PWM signal PWM1 is increased, and the power of the output power Vout is reduced.

In the present embodiment, the duty ratio of the PWM signal PWM1 is proportional to the output power of the switching power converter circuit 410; in some embodiments, the two are inversely proportional, i.e., the higher the duty cycle of the PWM signal PWM1, the lower the output power of the switching mode power converter circuit 410. For example, the main switch may be a PMOS switching transistor, and when the PWM signal PWM1 is at a logic high level, the main switch is kept off, and when the PWM signal PWM1 is at a logic low level, the main switch is kept on, so that the higher the duty ratio of the PWM signal PWM1, the longer the main switch is kept off, and the lower the output power of the switching power converter circuit 410 is. In some embodiments, the two are in direct proportion, that is, the higher the duty ratio of the PWM signal PWM1, the higher the output power of the switching mode power conversion circuit 410. For example, the main switch may be an NMOS switching transistor, and when the PWM signal PWM1 is at a logic high level, the main switch is kept on, and when the PWM signal PWM1 is at a logic low level, the main switch is kept off, so that the higher the duty ratio of the PWM signal PWM1, the longer the time the main switch is kept on, and the higher the output power of the switching power converter circuit 410.

Referring to fig. 3B, fig. 3B is a circuit block diagram of another aspect of the power conversion circuit according to the first embodiment of the present application, in which in a specific implementation, the PWM signal PWM1 is applied to, for example, but not limited to, a Current Sample (CS) terminal of the switching power conversion circuit 410 (for example, as shown in fig. 3B), so that the switching power conversion circuit 410 operates in an intermittent mode. As a non-limiting example, when the PWM signal PWM1 is at a logic high level, the switching power converter circuit 410 stops operating, that is, the main switch remains off, and when the PWM signal PWM1 is at a logic low level, the switching power converter circuit 410 may respond to other PWM signals to charge/discharge to obtain the output power Vout, so that the higher the duty ratio of the PWM signal PWM1, the longer the duration of the logic high level in each period, the longer the main switch stops operating, and the lower the output power of the switching power converter circuit 410. It should be noted that, in another embodiment, the duty ratio adjusting signal PWMAdj may also be applied to the main PWM control loop of the switching power converter circuit 410 to directly modulate the PWM duty ratio of the main switch, instead of the aforementioned intermittent mode.

In the present embodiment, the pfc circuit 300 includes a Boost converter circuit (Boost circuit) 310 and a second controller 320 coupled to the Boost converter circuit 310, the Boost converter circuit 310 may be disposed between the filter circuit 200 and the power converter circuit 400 (i.e., as a front stage of the power converter circuit 400), and is adapted to adjust a signal characteristic (e.g., phase, level, or frequency) of the filtered signal to increase a power factor of the filtered signal, and accordingly generate a power factor corrected filtered signal (hereinafter referred to as a correction signal), i.e., to increase the power factor of the filtered signal, so as to reduce reactive power of the filtered signal.

In one embodiment, the power conversion circuit 400 includes a Buck conversion circuit (Buck circuit) 410 and a first controller 420 coupled to the Buck circuit 410, wherein the Buck circuit 410 may correspond to the aforementioned switch-type power conversion circuit. The active bias generation circuit 600 in this embodiment supplies the operating voltage VCC required by the first controller 420 and the second controller 320. The Buck circuit 410 is adapted to perform dc-dc voltage reduction on the correction signal to obtain the output power Vout, wherein the Buck circuit 410 may include a main switch, and the main switch is controlled by the PWM signal PWM1 to be turned on or off. The Boost circuit 310 is similar to the Buck circuit 410 in circuit structure, and includes a main switch, a synchronous switch, an energy storage component, and the like, except that the circuit connection relationship of each device is properly adjusted. Preferably, the Buck circuit 410 and the Boost circuit 310 may be constructed using dedicated chips with appropriate peripheral circuits. In addition, in some embodiments, the main switching tube may also be integrated into the first controller 420, which is not limited by the disclosure.

Accordingly, the first controller 420 receives the duty ratio adjustment signal PWMAdj to generate the PWM signal PWM1, so that the Buck circuit 410 performs the charge/discharge operation in response to the logic level shift of the PWM signal PWM 1.

On the other hand, in the pfc circuit 300, the PWM signal PWM2 generated by the second controller 320 performs operation control (e.g., stop operation and charge/discharge operation) on the Boost circuit 310 substantially the same as/similar to that of the PWM signal PWM1 generated by the first controller 420 on the switching mode power converter circuit 410, and therefore, the description thereof is omitted here.

Fig. 5 is a schematic circuit diagram of a power factor correction circuit according to an embodiment of the present application. As shown in fig. 5, the pfc circuit 300 may boost the power factor of the filtered signal from the filter circuit 200 through two

connection terminals

301 and 302 to generate a corrected signal, and transmit the corrected signal to the power conversion circuit 400 of the subsequent stage through

connection terminals

401 and 402, and the pfc circuit 300 includes a second controller 320 as mentioned in fig. 4, a power switch Q301 connected to the second controller 320, a voltage transformer T301, and a diode D301. The power switch Q301 may be a MOS switch transistor (shown as an NMOS switch transistor). The first terminal 3201 (power terminal) of the second controller 320 is connected to the output terminal 607 of the active bias generation circuit 600 to obtain the desired operating voltage VCC (e.g., through the resistor R306) of the second controller 320. A second end 3202 of the second controller 320 is connected to one end of the induction coil T3011 of the voltage transformer T301 through the resistor R305, the tank coil T3012 of the voltage transformer T301 is connected in series to the trunk, and the other end of the induction coil T3011 of the voltage transformer T301 is grounded.

The diode D301 is connected in series to the trunk. The anode of the diode D301 is connected to one end of the energy storage coil T3012 of the voltage transformer T301, the other end of the energy storage coil T3012 is coupled to the connection terminal 301, and the cathode of the diode D301 is connected to the connection terminal 401 to connect the power conversion circuit 400. The third terminal 3203 of the second controller 320 is connected to the gate G of the power switch Q301 (e.g., via the resistor R304), and the drain D of the power switch Q301 is connected to the terminal n2 between the diode D301 and one terminal of the energy storage coil T3012 of the voltage transformer T301. The second controller 320 may further be connected to a sampling circuit S301 and other circuits, for example, the sampling circuit S301 includes a resistor R301 and a resistor R302 and a capacitor C301, a terminal n3 between the resistor R301 and the resistor R302 is connected to the fourth terminal 3204 of the second controller 320, the second controller 320 samples the divided voltage of the filtered signal, for example, by using the terminal n3, and the resistor R302 is connected in parallel with the capacitor C301.

Of course, considering that the PFC circuit has various implementation forms, and all of them can be cited in the present embodiment, it is not described in detail here.

Fig. 6 is a schematic diagram of a circuit architecture of a power conversion circuit according to an embodiment of the present invention, as shown in fig. 1 and 6, the power conversion circuit 400 receives a signal (e.g., a correction signal generated by the pfc circuit 300) provided by a previous stage through connection terminals 401 and 402, and provides a generated output power Vout to a L ED light source 500 through connection terminals 501 and 502, wherein the power conversion circuit 400 may employ a PWM (pulse Width modulation) circuit to output a target signal by controlling a pulse Width, specifically, the power conversion circuit 400 may include a first controller 420 and a Buck circuit 410, wherein the Buck circuit 410 includes a diode D401, a power switch Q401, a voltage transformer T401, a capacitor C403 and a resistor R404, the output power supply 420 outputs a desired voltage value and/or Vout through the first controller 420, the power switch Q401, the energy storage coil T4012 of the voltage transformer 401 (a coil connected in series between the power switch Q401 and the connection terminal 502), and the first controller 420 outputs a desired voltage value or Vout through a charging voltage transformer T4012 (a coil) in response to a PWM switch Q401, a PWM switch p-switch p-n) to generate a PWM signal, and a PWM signal p-n switch p-n, and a switch p-n switch p-n-p-.

The power switch Q401 may be a MOS switch (shown as an NMOS switch). The first terminal (power terminal) 4201 of the first controller 420 is connected to the output terminal of the active bias generation circuit 600 to receive the operating voltage VCC provided by the active bias generation circuit 600, and the second terminal 4202 of the first controller 420 is connected to one terminal of the inductor T4011 of the voltage transformer T401. One end of the energy storage coil T4012 of the voltage transformer T401 and one end of the capacitor C403 are connected to the negative end (i.e., the connection end 502) of the dc output end at an end point n4, and the other end of the energy storage coil T4012 of the voltage transformer T401 is connected to the anode of the diode D401. The cathode of the diode D401 and the other end of the capacitor C403 are connected to the positive terminal of the dc output terminal (i.e., the connection terminal 501). The second terminal 4202 of the first controller 420 is connected to one terminal of the inductor T4011 of the potential transformer T401, and the other terminal of the inductor T4011 of the potential transformer T401 is grounded. The third terminal 4203 of the first controller 420 is connected to the control terminal of the power switch Q401 (see the gate G of the NMOS switch transistor) through the resistor R403, the first terminal of the power switch Q401 (see the drain D of the NMOS switch transistor) is connected to the connection point between the diode D401 and the end of the storage coil T4012 of the voltage transformer T401, the second terminal of the power switch Q401 (see the source S of the NMOS switch transistor) is connected to the fourth terminal 4204 of the first controller 420 and one end of the resistor R404, and the other end of the resistor R404 is set at the ground GND. In the present embodiment, the input terminal 401 is electrically connected to the ground GND. The power conversion circuit 400 may also be provided with a sampling circuit to sample its operating state and serve as a reference for the first controller 420 to output the PWM signal PWM 1.

For example, the sampling circuit includes, for example, resistors R402 and R404, a capacitor C402, and an inductor of a voltage transformer T401, wherein the first controller 420 may sample the bus voltage from the resistor R402 and the capacitor C402 through a fifth terminal 4205, sample the output current from the inductor T4011 through a second terminal 4202 of the first controller 420, and sample the current flowing through the power switch Q401 from one terminal of the resistor R404 through a fourth terminal 4204 of the first controller 420. The configuration of the sampling circuit is related to the control manner of the first controller 420, but the disclosure is not limited thereto.

Fig. 7 is a schematic circuit architecture diagram of an active bias voltage generating circuit according to a first embodiment of the present application (an active bias voltage generating circuit 600a, for example, corresponding to the active bias voltage generating circuit 600 described above), the active bias voltage generating circuit 600a may include a second rectifying circuit 910, a third controller 660, and a freewheel unit 630, the second rectifying circuit 910 is connected to the input terminals ACN and AC L, the third controller 660 is connected to the freewheel unit 630, the freewheel unit 630 has an output terminal 607 for outputting an operating voltage VCC, the output terminal 607 is connected to the power conversion circuit 400 to supply the operating voltage VCC to the power factor correction circuit 300, the power regulation circuit 700, and the power conversion circuit 400.

The diodes D91 and D92 rectify the ac driving signal ACin, and the power-taking branch S601 generates a power-taking signal Vdc at the connection terminal 901 after being filtered by the capacitor C601, and the third controller 660 controls the switching of the energy-storage freewheeling unit 630 according to the power-taking signal Vdc to step down the voltage to form a working voltage VCC of the power conversion circuit 400, and outputs the working voltage VCC to the power conversion circuit 400 and the like through the output terminal 607. The third controller 660 is activated in response to the power-taking signal Vdc, and repeatedly charges and releases energy by controlling the on-time of the energy-storage freewheeling unit 630, and continuously turns on and off, and maintains freewheeling by using the diode D601, thereby forming the operating voltage VCC required by the pfc circuit 300, the power-supply adjusting circuit 700, and the power-supply converting circuit 400.

It should be noted that, in the present application, since the working voltage VCC required by the power factor correction circuit 300, the power regulation circuit 700 and the power conversion circuit 400 is not taken from the rectifying circuit and the filtering circuit in the trunk but is taken from the diodes D91 and D92 independently, the capacitance value of the capacitor C601 can be much smaller than the capacitance value required in the trunk, and therefore, the present application has the advantage of fast start.

In a specific embodiment, the cathodes of the diode D91 and the diode D92 are connected to the connection terminal 901, the anodes of the diode D91 and the diode D92 are respectively connected to the input terminals AC L and acn of the AC driving signal ACin, the connection terminal 901 is connected to one end of the capacitor C601, the other end of the capacitor C601 is connected to the ground terminal gnd, the third controller 660 is connected to one end of the inductor L601, and the other end of the inductor L601 is connected to the output terminal 607, wherein the inductor L601 may play a role of storing energy and releasing free-wheeling when the third controller 660 performs switching.

In this embodiment, the energy storage freewheeling unit 630 may include an inductor L601, a diode D601, and a capacitor C602, an output terminal of the third controller 660, one end of the inductor L601, and a cathode of the diode D601 are coupled to the connection terminal 603, an anode of the diode D601 and one end of the capacitor C602 are connected to the ground gnd, and the other end of the inductor L601 is coupled to the other end of the capacitor C602.

Further, the third controller 660 may be a MOS switch and a controller controlling the MOS switch, or may be an IC chip integrated with the MOS switch. In some embodiments, the MOS switch may be alternatively implemented by a switching tube such as a triode.

The active bias generating circuit 600 may further include a sampling circuit to sample the operating state thereof and serve as a reference for the output signal of the third controller 660. for example, the sampling circuit may include

sampling circuits

620 and 650. the sampling circuit 650 receives the power-taking signal Vdc through the power-taking terminal 901 to generate the sampling signal vsc1. the sampling circuit 620 samples the voltage across the inductor L601 through the

connection terminals

603 and 607 to generate the sampling signal Vsc 2. the third controller 660 controls the switches to output the stable operating voltage according to the sampling signals Vsc1 and Vsc2 of the sampling circuit 650 and the sampling circuit 620. the setting of the

sampling circuits

650 and 620 is related to the control manner of the third controller 660, which is not limited in this disclosure.

Fig. 8 is a circuit diagram of an active bias generation circuit according to a second embodiment of the present invention (active bias generation circuit 600B), the active bias generation circuit 600B of fig. 8 differs from the active bias generation circuit 600a of fig. 7 in that the active bias generation circuit 600B further generates a delay operating voltage VCCd and provides the delay operating voltage VCCd to the power regulation circuit 700 through

connections

701 and 702, specifically, the active bias generation circuit 600B provides the delay operating voltage VCCd required by the first detection circuit 710 of the power regulation circuit 700, as detailed later, in one embodiment, in addition to providing the delay operating voltage VCCd, the active bias generation circuit 600B also provides the operating voltage VCC to the power regulation circuit 700 and other circuits, the active bias generation circuit 600B of the present embodiment further includes a Buck circuit 670 and a delay switch circuit 680, wherein the Buck circuit 670 is similar to that fig. 7, the active bias generation circuit 600B may receive a power-taking signal through connection 901 to generate the operating voltage required by the power regulation circuit 700 at the output terminal 607, and the power regulation circuit 700, and the power regulation circuit 600B may further include a delay transistor 600C, a transistor 600B, a transistor C.

It should be noted that the active bias

voltage generation circuits

600a and 600b shown in fig. 7 and 8 may include a rectifying circuit formed by diodes D91 and D92 as shown in the figure to generate the power-taking signal Vdc through the connection terminal 901, but in another embodiment, the active bias

voltage generation circuits

600a and 600b may not include the above-mentioned rectifying circuit, in this case, the power-taking signal may be obtained by a rectifying circuit in another circuit module, which will be described in detail later.

Referring to fig. 9, fig. 9 is a schematic circuit block diagram of a power supply adjusting circuit according to a first embodiment of the present disclosure, the power supply adjusting circuit 700 includes a first detection circuit 710 and a first signal processing circuit 720, the first detection circuit 710 is adapted to detect an operating parameter of the high power L ED lighting device 10, and in particular, in one embodiment, the first detection circuit 710 is adapted to detect an operating parameter of the L ED light source 500 (see the direction of a dashed arrow) to obtain a first detection signal Vsense 1. for an implementation example of the first detection circuit 710, the first detection circuit 710 may be one of a temperature sensor (e.g., the temperature sensor may be a relatively low-cost thermocouple or a thermal resistor with relatively high measurement accuracy, etc.) and an optical sensor (e.g., the optical sensor may be an ambient light sensor, an infrared light sensor, a solar light sensor, an ultraviolet light sensor, etc.), and accordingly, the operating parameter may be at least one of an ambient temperature in a lampshade/lamp housing, an operating temperature of the L ED light source 500, and any other suitable parameters such as a brightness (light intensity), and in particular, the first detection signal may be a positive related to an operating voltage 1, or a positive related signal.

The first signal processing circuit 720 is disposed between the first detecting circuit 710 and the power converting circuit 400, and is configured to generate a duty ratio adjusting signal PWMAdj according to the first detecting signal Vsense1, and the first signal processing circuit 720 is adapted to perform one or more of the following signal processing on the first detecting signal Vsense1 to obtain the duty ratio adjusting signal PWMAdj: signal conversion, amplification, bias supply and filtering. For example, the amplitude of the duty ratio adjustment signal PWMAdj may be related to or proportional to the amplitude of the first detection signal Vsense 1. The duty ratio adjusting signal PWMAdj may be a voltage signal or a current signal; preferably, it is a voltage signal.

Referring to fig. 10, fig. 10 is a circuit configuration diagram of a temperature detection circuit according to a first embodiment of the present disclosure, wherein the power adjustment circuit 700 may be a temperature detection circuit (hereinafter, described as the temperature detection circuit 700), the first detection circuit 710 may be a temperature sensor (hereinafter, described as the temperature sensor 710), and the first signal processing circuit 720 may be a temperature compensation circuit (hereinafter, described as the temperature compensation circuit 720). in this embodiment, the active bias generation circuit 600b provides an operating voltage VCC (or a delayed operating voltage VCCd) required by the temperature detection circuit 700. specifically, as shown in fig. 10, the active bias generation circuit 600b provides a delayed operating voltage VCCd required by the temperature sensor 710. the temperature compensation circuit 720 receives a first detection signal Vsense1 (corresponding to a temperature sensing signal generated by the temperature detection circuit according to an ambient temperature) through a connection terminal 801, and accordingly generates a temperature detection signal Vtemp (corresponding to the duty ratio adjustment signal pwdj) to be sent to the power conversion circuit 400 to adjust the power Vout of the output power supply, and when the light source 500 exceeds a temperature threshold (i.e.g., the temperature detection circuit 500 generates a temperature over-temperature control signal 1, which is over-decreased in response to the first detection signal Vsense, thereby ensuring that the output of the power detection circuit operates in response to the output vseme of the power detection circuit L.

Referring to fig. 11, fig. 11 is a schematic circuit architecture diagram of a temperature compensation circuit according to a second embodiment of the present application. Further, as shown in fig. 11, the temperature compensation circuit 720 may perform appropriate signal processing on the first detection signal Vsense1 generated by the temperature sensor 710. The temperature compensation circuit 720 of the present embodiment can be implemented by using a comparator CP (but not limited thereto), wherein an input terminal of the comparator CP can receive a voltage (represented by the first detection signal Vsense 1) indicating temperature information generated by the temperature sensor 710 through the connection terminal 801, and compare the voltage Vsense1 indicating temperature information with a reference voltage Vref at another input terminal of the comparator CP, so as to determine whether the temperature detected by the temperature detection circuit 700 exceeds the threshold, and generate a temperature detection signal Vtemp at an output terminal of the comparator CP indicating whether the temperature exceeds the threshold. The output terminal of the comparator CP is connected to the first controller 420 of the power conversion circuit 400, so that the temperature detection signal Vtemp (i.e., the duty ratio adjustment signal PWMadj) is fed back to the first controller 420 of the power conversion circuit 400, so that the first controller 420 can adjust the output power in response to the current system environment temperature. The signal processing process between the first controller 420 and the switching power converter circuit 410 is already mentioned in fig. 3A, and therefore is not described herein again.

In other embodiments, the temperature compensation circuit 720 may also have a zener diode and a thermistor thereon. After the thermistor, the thermistor is connected to an amplifying circuit through an adjustable potentiometer, and the negative end of the amplifying circuit is connected with the output end of the temperature compensating circuit 720.

Specifically, the circuit diagram of the temperature compensation circuit 720 may be as shown in fig. 11, and of course, the present application is not limited to the circuit shown in fig. 11 in consideration of various implementation forms of the temperature compensation circuit 720.

Referring to fig. 12A, fig. 12A is a circuit block diagram of a power regulation circuit according to a second embodiment of the present application. Referring to fig. 12B, fig. 12B is a circuit block diagram of a power regulation circuit according to a third embodiment of the present application.

As shown in fig. 12A, the power adjustment circuit 700 may further include a second detection circuit 730 and a second signal processing circuit 740 in addition to the first detection circuit 710 and the first signal processing circuit 720, wherein the second detection circuit 730 is adapted to monitor the input information parameter paramin to generate the second detection signal Vsense 2. in one embodiment, the second detection circuit 730 is adapted to monitor the input information parameter paramin the associated L ED light source 500, determine whether the input information parameter paramin exceeds a threshold value, and generate the second detection signal Vsense2 according to the determination result, the second signal processing circuit 740 is disposed between the second detection circuit 730 and the power conversion circuit 400, and is adapted to generate the second duty ratio adjustment signal PWMAdj2 according to the second detection signal Vsense2, and adjust the amplitude of the second duty ratio adjustment signal PWMAdj2 according to the variation of the input information parameter paramain.

Referring to fig. 12B, fig. 12B is different from fig. 12A in that the first signal processing circuit 720 and the second signal processing circuit 740 of the present embodiment use a shunt connection (shunt) method, so that the power conversion circuit 400 only needs a single terminal n1 to receive the first duty ratio adjustment signal PWMAdj1 and the second duty ratio adjustment signal PWMAdj2, and thus the duty ratio adjustment signal PWMAdj can be obtained.

Therefore, as shown in fig. 3A, in one embodiment, the duty ratio adjustment signal PWMAdj may include the first duty ratio adjustment signal PWMAdj1 generated by the first signal processing circuit 720 and the second duty ratio adjustment signal PWMAdj2 generated by the second signal processing circuit 740 in fig. 12A and 12B, the output power Vout of the power conversion circuit 400 is adjusted by adjusting the amplitude of the duty ratio adjustment signal PWMAdj, so that the high-power L ED lighting apparatus 10 can be in the optimal lighting state, in other words, from the viewpoint of the operation of the power conversion circuit 400, the power conversion circuit 400 simultaneously refers to the first duty ratio adjustment signal PWMAdj1 and the second duty ratio adjustment signal PWMAdj2 to generate the output power Vout, that is, a change in the signal level of any one of the first duty ratio adjustment signal PWMAdj1 and the second duty ratio adjustment signal PWMAdj2 may cause a corresponding change in the duty ratio of the output power Vout.

Fig. 13A is a schematic circuit block diagram of a second detection circuit and a second signal processing circuit according to the first embodiment of the present application. In the embodiment, the first signal processing circuit 720 and the second signal processing circuit 740 still use a shunt connection (shunt), so that the power conversion circuit 400 only needs a single node n1 to receive the first duty ratio adjustment signal PWMAdj1 and the second duty ratio adjustment signal PWMAdj2, that is, the duty ratio adjustment signal PWMAdj includes the first duty ratio adjustment signal PWMAdj1 and the second duty ratio adjustment signal PWMAdj 2. From another perspective, the first duty ratio adjustment signal PWMAdj1 and the second duty ratio adjustment signal PWMAdj2 can be fed into the controller of the power conversion circuit 400 through the same terminal n 1.

In some embodiments, the second detecting circuit 730 may be an input voltage monitoring circuit, and the received input information parameter paramin may be the input power VIN (that is, the input information parameter paramin is the amplitude of the input power VIN), and determines whether the amplitude of the input power VIN is greater than a preset ac voltage threshold value, since the too large or too small amplitude of the input power VIN may affect the operation of the internal devices of the high power L ED lighting apparatus 10, after determining whether the amplitude is greater than the preset ac voltage threshold value, the lighting state of the high power L ED lighting apparatus 10 may be adjusted L by the output power Vout of the power converting circuit 400, so that the high power lighting apparatus 10 always operates in an optimal circuit state.

In the embodiment shown in fig. 13A, when the input power source VIN is too low, for example, below the preset ac voltage threshold, the current flowing through the main switch in the power factor correction circuit 300 will be too large, so that the device voltage of the main switch is large, the temperature is high, and the main switch is easily damaged, therefore, by monitoring the input power source VIN, the output power of the switching power conversion circuit 410 can be reduced when the input power source VIN is too low, so as to reduce the current flowing through the main switch in the power factor correction circuit 300, which can reduce the device voltage of the main switch, and thus implement the low-voltage input protection function for the high-power L ED lighting device 10.

Referring to fig. 13A, in an embodiment, in response to the second detection signal Vsense2 indicating that the input power VIN monitored by the second detection circuit 730 is less than or equal to the predetermined ac voltage threshold, the second signal processing circuit 740 is adapted to adjust the amplitude of the duty ratio adjustment signal PWMAdj to a first level; and in response to the second detection signal Vsense2 indicating that the input power VIN is greater than the preset ac voltage threshold, the second signal processing circuit 740 is adapted to adjust the amplitude of the duty ratio adjustment signal PWMAdj to a second level, wherein the first level is greater than the second level. The amplitude of the duty ratio adjustment signal PWMAdj is positively correlated with the duty ratio of the PWM signal PWM 1. That is, the lower the input power VIN, the higher the amplitude of the duty ratio adjustment signal PWMAdj, so that the duty ratio of the PWM signal PWM1 is higher, so that the output power of the switching mode power conversion circuit 410 is lower.

It should be noted that, in this embodiment, the second signal processing circuit 740 is configured to adjust the amplitude of the duty ratio adjustment signal PWMAdj according to the monitoring result of the second detection circuit 730, in a specific implementation, as long as the second signal processing circuit 740 can adjust the amplitude of the duty ratio adjustment signal PWMAdj to the second level and the first level (where the first level is greater than the second level) when the amplitude of the input power VIN is greater than the preset ac voltage threshold and is equal to or less than the preset ac voltage threshold, respectively, so as to correspondingly adjust the output power of the switching mode power conversion circuit 410. The present embodiment does not specifically limit the specific circuit configuration of the second signal processing circuit 740 and the manner of adjusting the amplitude of the duty ratio adjustment signal PWMAdj.

With continued reference to fig. 13A, as a non-limiting example, in a specific implementation, the second signal processing circuit 740 may include a switch Q1 (shown as an NMOS switch tube) and a voltage divider resistor R71. Wherein, the control terminal of the switch Q1 (see the gate G of the NMOS switch tube) receives the second detection signal Vsense2, the input terminal of the switch Q1 (see the source S of the NMOS switch tube) is coupled to the voltage reference terminal (here, the ground with the potential value of 0V is taken as an example for illustration, but not limited thereto, the voltage reference terminal may also be a port with other potential values), and the output terminal of the switch Q1 (see the drain D of the NMOS switch tube) is coupled to the output terminal of the first signal processing circuit 720; the voltage divider R71 is coupled between the output terminal of the first signal processing circuit 720 and the output terminal of the switch Q1, or between the voltage reference terminal and the input terminal of the switch Q1.

Wherein, in response to the input power VIN monitored by the second detection circuit 730 being less than or equal to the preset ac voltage threshold, the second detection circuit 730 generates the second detection signal Vsense2 to control the switch Q1 to turn off, so that the amplitude of the duty ratio adjustment signal PWMAdj is adjusted to the first level; and in response to the input power VIN monitored by the second detection circuit 730 being greater than the preset ac voltage threshold, the second detection circuit 730 generates the second detection signal Vsense2 to control the switch Q1 to be turned on, so that the amplitude of the duty ratio adjustment signal PWMAdj is adjusted to the second level.

Fig. 13A illustrates that after the second detection circuit 730 generates the second detection signal Vsense2 to turn off/on the switch Q1, fig. 13A further illustrates an operation process between the first detection circuit 710 and the first signal processing circuit 720, taking an operating parameter as an example of temperature, and taking an actual value as an example, the first detection signal Vsense1 generated by the first detection circuit 710 is, for example, a voltage signal ranging from 0.3V to 1.45V, the voltage interval corresponding to a temperature range from-20 degrees celsius to 95 degrees, the first signal processing circuit 720 can generate a voltage signal having a voltage interval from 0.4V to 3V as the first duty ratio adjustment signal pwmadj1 in response to the first detection signal Vsense1 in the voltage interval, wherein the two voltage intervals are positively correlated with the temperature interval, in other words, when the level of the first duty ratio adjustment signal PWMAdj1 generated by the first signal processing circuit 720 is higher, the temperature of the high-power illumination device L or high-power illumination device 500 is detected by the first detection circuit 710.

Referring to fig. 3A and 13A again, in an embodiment, the duty ratio adjustment signal PWMAdj (e.g., 0.4V) is input to the first controller 420. In this case, the on or off of the switch Q1 is determined according to whether the input power VIN is greater than the predetermined ac voltage threshold.

For example, when the level of the input power VIN is greater than the predetermined ac voltage threshold, the switch Q1 is turned on in response to the second detection signal Vsense2 (which may be a logic high level), the first signal processing circuit 720 has an output impedance (not shown), and the output impedance and the voltage dividing resistor R71 divide the output range of the first signal processing circuit 720, so that the amplitude range of the duty ratio adjustment signal PWMAdj is reduced, that is, the second level, and the specific value of the second level depends on the output impedance and the resistance value of the voltage dividing resistor R71.

When the level of the input power VIN is less than or equal to the preset ac voltage threshold, the switch Q1 is turned off in response to the second detection signal Vsense2 (which may be a logic low level), and the duty ratio adjustment signal PWMAdj having a level of 0.4V to 3V (i.e., the first level) is provided to the first controller 420. the first controller 420 increases the duty ratio of the output PWM signal PWM1 based on the received duty ratio adjustment signal PWMAdj. since the first level is greater than the second level, for example, correspondingly, the duty ratio adjustment signal PWMAdj corresponding to the second level increases the duty ratio of the PWM signal PWM1 by 10% than the duty ratio of the PWM signal PWM1 corresponding to the first level, accordingly, the output power of the switching type power conversion circuit 410 having a level of the input power VIN less than or equal to the preset ac voltage threshold is reduced by 10% than the output power of the switching type power conversion circuit 410 corresponding to the preset ac voltage threshold, so that the lighting device L can operate in the optimal protection state for the lighting device under the low-voltage input state.

It should be noted that the switch Q1 may also be a semiconductor switching device such as a PMOS switch transistor or a transistor, but is not limited thereto, and it may also be a conventional switching component or an integrated switch packaged on a chip.

The second signal processing circuit 740 may have any other suitable circuit configuration as long as it can adjust the amplitude of the duty ratio adjustment signal PWMAdj so that the first level is higher than the second level.

Referring to fig. 13B, fig. 13B is a schematic circuit block diagram of a second detection circuit and a second signal processing circuit according to a second embodiment of the present disclosure, which is similar to the circuit structure and the operation principle of fig. 13A, and mainly differs therefrom in that in implementation, the second detection circuit 730 may be a human body detection sensor.

In fig. 13B, the first signal processing circuit 720 and the second signal processing circuit 740 of the present embodiment still use a shunt connection (shunt), so that the power conversion circuit 400 only needs a single terminal n1 to receive the first duty ratio adjustment signal PWMAdj1 and the second duty ratio adjustment signal PWMAdj 2. That is, the duty ratio adjustment signal PWMAdj can be obtained through the single terminal n1, and in an embodiment, the duty ratio adjustment signal PWMAdj is a superposition result of the first duty ratio adjustment signal PWMAdj1 and the second duty ratio adjustment signal PWMAdj 2).

The human body detecting sensor 730 is used for detecting whether a human body exists in an external environment (in the embodiment, the human body sensing signal ParaHuman is taken as an example for sensing whether a human body exists in an external environment), so as to obtain a second detecting signal Vsense 2. The second signal processing circuit 740 is coupled to the human body detecting sensor 730 and adapted to adjust the amplitude of the duty ratio adjusting signal PWMAdj according to the second detecting signal Vsense 2.

Wherein the second signal processing circuit 740 is adapted to adjust the amplitude of the duty ratio adjustment signal PWMAdj to a first level when indicating that the external environment does not have a human body in response to the second detection signal Vsense 2; and in response to the second detection signal Vsense2 indicating that a human body exists in the external environment, the second signal processing circuit 740 is adapted to adjust the amplitude of the duty ratio adjustment signal PWMAdj to a second level, wherein the first level is greater than the second level; the amplitude of the duty ratio adjustment signal PWMAdj is positively correlated with the duty ratio of the PWM signal PWM 1.

Further, when no human body exists in the external environment, the amplitude of the duty ratio adjustment signal PWMAdj is high, so that the duty ratio of the PWM signal PWM1 is high, the output power of the switching mode power conversion circuit 410 is low, so as to reduce the brightness of the L ED light source 500, that is, energy consumption is saved when no human body exists in the external environment, and when a human body exists in the external environment, the amplitude of the duty ratio adjustment signal PWMAdj is low, so that the duty ratio of the PWM signal PWM1 is low, and the output power of the switching mode power conversion circuit 410 is high, so as to relatively increase the brightness of the L ED light source 500.

In a specific implementation, the human detection sensor 730 may be one of the following sensors: sound sensor, light sensor, infrared sensor; accordingly, whether a human body exists can be detected through sound generated by the action of the human body when the human body exists, shading of the light sensor by the human body when the human body exists, blocking of an infrared signal by the human body when the human body exists, or an infrared signal generated by the human body. Preferably, the second detection signal Vsense2 is a switching value signal, i.e. can be identified as a digital signal "1" or "0", but is not limited thereto, and it can also be a non-switching value signal, i.e. can be identified as an analog signal, and the second signal processing circuit 740 can also identify its detection result, i.e. whether the external environment has a human body according to the amplitude of the second detection signal Vsense 2. In addition, the human body detection sensor 730 may be any other suitable sensor type as long as detection of the presence or absence of a human body can be achieved.

As a non-limiting example, in a specific implementation, the second signal processing circuit 740 may include a switch Q2 (shown as an NMOS switch tube) Q1 and a voltage dividing resistor R72. A control terminal (see the gate G of the NMOS switch transistor) of the switch Q2 receives the second detection signal Vsense2, an input terminal (see the source S of the NMOS switch transistor) of the switch Q2 is coupled to a voltage reference terminal (for example, ground), and an output terminal (see the drain D of the NMOS switch transistor) of the switch Q2 is coupled to the output terminal of the second signal processing circuit 740; the voltage divider resistor R72 is coupled between the output terminal of the second signal processing circuit 740 and the output terminal of the switch Q2, or between a voltage reference terminal (for example, ground) and the input terminal of the switch Q2.

Wherein, when no human body is present in response to the external environment (i.e., in response to the human body sensing signal ParaHuman), the second detection signal Vsense2 controls the switch Q2 to be turned off, so that the amplitude of the duty ratio adjustment signal PWMAdj is adjusted to the first level; and in response to the presence of a human body in the external environment (i.e., in response to the human body sensing signal ParaHuman), the second detection signal Vsense2 controls the switch Q2 to be turned on such that the amplitude of the duty ratio adjustment signal PWMAdj is adjusted to a second level, wherein the first level is greater than the second level.

In fig. 13B, details regarding operations of the first detecting circuit 710 and the first signal processing circuit 720 can refer to the embodiment of fig. 13A, and are not repeated herein.

Referring to fig. 14, fig. 14 is a schematic circuit block diagram of a high power L ED lighting device according to a second embodiment of the present invention (a high power L ED lighting device 20). the difference between the circuit block of the second embodiment of fig. 14 and the circuit block of the first embodiment of fig. 1 is that the high power L ED lighting device 20 further includes an input circuit 900, the input circuit 900 is coupled between the

input terminals

101 and 102 and the input terminals ACN and AC L. preferably, the input circuit 900 can be an EMI suppression circuit (also referred to as EMI suppression circuit). the EMI suppression circuit 900 can reduce the influence of the interfering magnetic field on the output power Vout. in one embodiment, the input circuit 900 is further coupled to the active bias generation circuit 600 through the power terminal 901

Referring to fig. 14 and 15 together, fig. 15 is a schematic circuit architecture diagram of an input circuit according to an embodiment of the present invention, in the electromagnetic interference suppression circuit 900, an excitation coil L F is connected to a power line (also referred to as a bus or a trunk) connecting the input terminals ACN and AC L, a resistive branch (e.g., a branch where a resistor R91 is located) and a plurality of capacitive branches (e.g., capacitors C91, C92, and C93) are located, and inductors L i91 and i92 on the two trunks, respectively, the electromagnetic interference suppression circuit 900 may further include a second rectification circuit 910 between two terminals of the capacitor C91 and the inductors L i91 and L i92, wherein the second rectification circuit 910 includes a diode D91 and a diode D92 (i.e., a diode D91 and a diode D92 are connected in series with opposite polarities), and the second rectification circuit 910 includes a diode D91 and a diode D42 connected in series with opposite polarities, and a diode D599, and an active rectification circuit capable of generating an active AC interference suppression signal through an AC output terminal 901 b capable of generating an active rectification bias voltage through the active rectification circuit 600, a power-taking circuit capable of generating an active power-taking circuit capable of the active rectification circuit 901 and an active power-taking circuit capable of the active power-taking circuit 600.

Of course, the EMI suppression circuit 900 may be an EMI filter circuit, and the EMI filter circuit is provided with a plurality of filter components, specifically, the EMI filter circuit is provided with a differential mode capacitor, a common mode inductor, and a common mode capacitor.

In addition, a fuse F1 may be connected in series to the trunk line to which the input terminals ACN and AC L are connected, and the fuse F1 may be a current fuse or a temperature fuse, which is not limited in this embodiment.

It should be noted that, in the embodiment shown in fig. 14, the power conversion circuit 400 not only can convert the filtered signal into the output power Vout capable of lighting L ED light source 500, but also can generate the dc driving signal of the target voltage value according to the duty ratio adjustment signal PWMAdj generated by the power adjustment circuit 700 to control the brightness level of L ED light source 500.

In some embodiments, the filter circuit 200 may also include only the capacitor C201 to implement the filtering function, without affecting the intended function of the present application.

As shown in fig. 16A, fig. 16A is a schematic circuit block diagram of a power module according to a first embodiment of the present disclosure, in an embodiment, a power module 30 includes a first rectifying circuit 100, a filter circuit 200, a power factor correction circuit 300, a power conversion circuit 400, and an active bias generation circuit 600, as shown in fig. 16A, the power module 30 of the present embodiment is suitable for the high power L ED lighting device 10 of fig. 1, for example.

As shown in fig. 16B, fig. 16B is a circuit block diagram of a power module according to a second embodiment of the present disclosure, in an embodiment, the power module 40 includes a first rectifying circuit 100, a filter circuit 200, a power factor correction circuit 300, a power conversion circuit 400, an active bias generation circuit 600, and an input circuit 900, as shown in fig. 16B, the power module 30 of the present embodiment is suitable for the high power L ED lighting device 20 of fig. 14, for example.

The

power modules

30 and 40 generate output power Vout to drive L ED light source 500. the high power L ED lighting device 10 can be any type of L ED lamp with output power above 30W, L ED lamp with output power equivalent to above 30W of xenon lamp, or L ED lamp with L ED light source 500 using high power lamp beads (e.g. lamp beads with rated current greater than 20 mA).

Any numerical value recited herein includes all values from the lower value to the upper value that are incremented by one unit, provided that there is a separation of at least two units between any lower value and any higher value. For example, if it is stated that the number of a component or a value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended that equivalents such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also expressly enumerated in this specification. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are only examples of what is intended to be explicitly recited, and all possible combinations of numerical values between the lowest value and the highest value that are explicitly recited in the specification in a similar manner are to be considered.

Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. The use of "about" or "approximately" with a range applies to both endpoints of the range. Thus, "about 20 to about 30" is intended to cover "about 20 to about 30", including at least the endpoints specified.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified component, ingredient, part or step as well as other components, ingredients, parts or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of components, ingredients, elements or steps herein also contemplates embodiments that consist essentially of such components, ingredients, elements or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.

A plurality of components, ingredients, parts or steps can be provided by a single integrated component, ingredient, part or step. Alternatively, a single integrated component, ingredient, part or step may be divided into separate plural components, ingredients, parts or steps. The disclosure of "a" or "an" to describe a component, ingredient, part or step is not intended to foreclose other components, ingredients, parts or steps.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of the subject matter that is disclosed herein is not intended to forego such subject matter, nor should the inventors be construed as having contemplated such subject matter as being part of the disclosed inventive subject matter.

When the high-power L ED lighting device in the embodiment shown in FIGS. 1-16B is used, the starting speed of the HID-L ED can be reduced to about 60ms, which has very high application value and good use experience, besides, the high-power L ED lighting device of the present application is also suitable for detecting L ED light source or external operating parameters, and accordingly adjusting the power of the power conversion circuit to achieve the purpose of protection or energy saving.

Claims

1. A power supply module for driving a high power L ED lighting device, comprising:

the first rectifying circuit receives the alternating current driving signal to generate a rectified signal;

a filter circuit receiving the rectified signal to generate a filtered signal;

a power conversion circuit for performing power conversion according to the filtered signal to generate an output power to illuminate the L ED light source in the high power L ED lighting device, and

the active bias voltage generating circuit receives the alternating current driving signal to generate working voltage, wherein the power supply conversion circuit operates by taking the working voltage as a power supply;

wherein a level of the operating voltage is lower than a level of a voltage of the output power supply.

2. The power module of claim 1, wherein the power module further comprises:

and the power factor correction circuit receives the filtered signal to generate a correction signal so as to improve the power factor of the power module, wherein the power conversion circuit performs power conversion on the correction signal to generate the output power to light the L ED light source, and the power factor correction circuit operates by taking the working voltage as a power supply.

3. The power module of claim 1, wherein the power module further comprises:

and the power supply adjusting circuit generates a duty ratio adjusting signal to adjust the output power of the power supply converting circuit according to at least one of the following working parameters, namely the working temperature of the high-power L ED lighting device, the brightness of the L ED light source, the input power of the high-power L ED lighting device, manual touch action or whether a person approaches the high-power L ED lighting device.

4. The power supply module of claim 3, wherein the power regulation circuit operates from the operating voltage as a power supply.

5. The power module of claim 3, wherein the power regulation circuit generates the duty cycle regulation signal based at least on the operating temperature.

6. The power module of claim 5, wherein the power regulation circuit further generates the duty cycle regulation signal according to a voltage of the input power.

7. The power supply module of any one of claims 1 to 6 wherein the level of the voltage of the output power supply is between 10 and 100 times the level of the operating voltage.

8. The power supply module of any one of claims 1 to 6, wherein:

the rising time of the voltage of the output power supply is 10 times to 100 times of the rising time of the working voltage; or

The output power of the power conversion circuit is between 100 times and 1000 times of the output power of the active bias generation circuit.

9. The power module according to any one of claims 1 to 6, wherein the first rectifying circuit, the filtering circuit and the power conversion circuit supply power to the L ED light source through a power loop, and the operating voltage does not take power from the power loop.

10. A high power L ED lighting device, comprising a L ED light source and the power module of any one of claims 1 to 6.

11. The high power L ED lighting device of claim 10, wherein a voltage level of the output power supply is between 10 times and 100 times a level of the operating voltage.

12. The high power L ED lighting device of claim 10, wherein:

13. The high power L ED lighting device of claim 10 wherein the first rectifying circuit, the filter circuit and the power conversion circuit power the L ED light source through a power loop from which the operating voltage is not drawn.

14. A power supply module for driving a high power L ED lighting device, comprising:

a power conversion circuit for performing power conversion according to an input power to generate an output power to turn on the L ED light source of the high-power L ED lighting device;

the active bias voltage generating circuit receives an alternating current driving signal to generate working voltage, wherein the power supply conversion circuit operates by taking the working voltage as a power supply; and

and the power supply adjusting circuit is coupled with the power supply conversion circuit and the active bias generating circuit and generates a duty ratio adjusting signal according to at least one of the following working parameters to adjust the output power of the power supply conversion circuit, wherein the working temperature, the working temperature or the brightness of the L ED light source, the artificial touch action or whether a person approaches the power supply of the high-power L ED lighting device, and the power supply adjusting circuit operates by taking the working voltage as the power supply.

15. The power supply module of claim 14, wherein the power regulation circuit comprises:

a first detection circuit for detecting a first operating parameter of the L ED light source to obtain a first detection signal, an

The first signal processing circuit is used for generating a first duty ratio adjusting signal according to the first detection signal, wherein the duty ratio adjusting signal is related to the first duty ratio adjusting signal.

16. The power module as claimed in claim 15, wherein the active bias generation circuit further generates a delayed working voltage, and wherein the first detection circuit operates with the delayed working voltage as a power source.

17. The power module of claim 16, wherein the active bias generation circuit comprises:

a delay switch circuit for generating the delayed operating voltage according to the operating voltage, the delay switch circuit comprising:

a transistor having a first terminal coupled to the operating voltage and a second terminal for generating the delayed operating voltage;

a resistor coupled between the first terminal of the transistor and the control terminal of the transistor; and

and the capacitor is coupled between the delayed working voltage and the grounding point.

18. The power module of claim 16, wherein the first operating parameter is a temperature associated with the L ED light source, the first detection circuit is a temperature sensor to detect the temperature associated with the L ED light source, and the first signal processing circuit is a temperature compensation circuit, wherein the temperature sensor operates with the delayed operating voltage as a power supply.

19. The power supply module of claim 15, wherein the power regulation circuit further comprises:

the second detection circuit is used for monitoring the input information parameters to generate a second detection signal; and

the second signal processing circuit is configured to generate a second duty cycle adjustment signal according to the second detection signal, wherein the duty cycle adjustment signal is further related to the second duty cycle adjustment signal.

20. The power module of claim 19, wherein the first signal processing circuit and the second signal processing circuit are connected in a shunt manner, such that the power conversion circuit receives the first duty cycle adjustment signal and the second duty cycle adjustment signal at a single end to obtain the duty cycle adjustment signal.

21. The power module of claim 20 wherein the second signal processing circuit adjusts the amplitude of the duty cycle adjust signal to a first level when the input information parameter does not exceed a preset voltage threshold; and when the input information parameter exceeds the preset voltage threshold, the second signal processing circuit adjusts the amplitude of the duty ratio adjusting signal to a second level.

22. The power supply module of claim 21 wherein the output power of the power conversion circuit responsive to the second level is lower than the output power of the power conversion circuit responsive to the first level.

23. The power supply module of claim 22,

the input information parameter is an input power supply, and the second detection circuit is used for receiving the input power supply and judging whether the amplitude of the input power supply is greater than a preset voltage threshold value or not so as to generate a second detection signal;

the second signal processing circuit comprises a switch and a divider resistor, the switch and the divider resistor are connected between the output end of the first signal processing circuit and the grounding end in series, the control end of the switch receives the second detection signal,

wherein the second detection signal controls the switch to turn off in response to the input power supply being less than or equal to the preset voltage threshold, such that the amplitude of the duty cycle adjustment signal is adjusted to the first level; and in response to the input power supply being greater than the preset voltage threshold, the second detection signal controls the switch to be turned on, so that the amplitude of the duty ratio adjustment signal is adjusted to the second level.

24. The power module of claim 23, wherein the power module further comprises:

the rectifying circuit receives the alternating current driving signal to generate a rectified signal;

a filter circuit receiving the rectified signal to generate a filtered signal; and

the power factor correction circuit receives the filtered signal to generate a correction signal so as to improve the power factor of the power supply module;

wherein the input power is the AC drive signal, the rectified signal, the filtered signal, or the correction signal.

25. The power supply module of claim 21,

the second detection circuit is a human body detection sensor and is used for detecting whether a human body exists in the external environment so as to obtain a second detection signal;

wherein the second detection signal controls the switch to be turned off such that the amplitude of the duty ratio adjustment signal is adjusted to the first level when the second detection signal indicates that the external environment does not have the human body; and when the second detection signal indicates that a human body exists in the external environment, the second detection signal controls the switch to be switched on, so that the amplitude of the duty ratio adjusting signal is adjusted to the second level.

26. The power module of claim 25, wherein one of:

(1) the human body detection sensor is a sound sensor, and the input information parameters correspond to sound emitted by human body actions;

(2) the human body detection sensor is a light sensor, and the input information parameter corresponds to the shading of the light sensor by a human body; or

(3) The human body detection sensor is an infrared sensor, and the input information parameter corresponds to the blocking of a human body on an infrared signal or an infrared signal sent by the human body;

to detect the presence of a human body.

27. The power supply module of claim 25 wherein the output power of the power conversion circuit responsive to the second level is lower than the output power of the power conversion circuit responsive to the first level.

28. A high power L ED lighting device, comprising a L ED light source and the power module of any one of claims 14-27 for generating the output power to illuminate the L ED light source.