CN104507239A - General energy-saving LED (light-emitting diode) drive power supply device - Google Patents
General energy-saving LED (light-emitting diode) drive power supply device Download PDFInfo
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- CN104507239A CN104507239A CN201510006250.0A CN201510006250A CN104507239A CN 104507239 A CN104507239 A CN 104507239A CN 201510006250 A CN201510006250 A CN 201510006250A CN 104507239 A CN104507239 A CN 104507239A
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- 238000002955 isolation Methods 0.000 claims description 28
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- 238000004364 calculation method Methods 0.000 claims description 15
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- 230000033228 biological regulation Effects 0.000 claims description 7
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a general energy-saving LED (light-emitting diode) drive power supply device. An independent circulating control unit is arranged, so that the voltage precision can be controlled within an extremely small range, the voltage distortion can be effectively restrained; a steady-current control unit is arranged, so that the linear continuity of the current is kept; an emulation power calculating unit is arranged for performing emulation calculating on output drive power, so that the output power can be supplemented and corrected; the whole circuit is strong in interference resistance, stable in output, and has a relatively high electrical energy utilization rate.
Description
Technical Field
The invention relates to the field of LED driving, in particular to a universal energy-saving LED driving power supply device.
Background
With the development of human civilization, lighting devices have already entered the daily life of people, and the traditional lighting sources mainly include incandescent lamps, fluorescent lamps, energy-saving lamps and the like, and the technology of the lighting sources is relatively mature, however, the lighting sources have short service life, high energy consumption, low luminous efficiency and even some of the lighting sources can bring pollution, and it is a future trend to develop novel lighting sources.
As a new light source, LEDs have the following main advantages over conventional light sources: the LED lighting lamp has the advantages of small volume, low power consumption, low heat generation, long service life, high response speed, safety, environmental friendliness, capability of meeting the requirements of special occasions due to the fact that the LED is successfully applied to lighting of certain general occasions at present, high luminous intensity, long service life and environmental friendliness, and the LED lighting lamp is bound to replace the traditional lighting to become a mainstream lighting source along with the increasing exhaustion of resources.
At present, alternating current is mainly adopted for supplying power to an LED, and constant voltage and current are obtained through a converter to supply power to the LED, however, the mode has low power factor and can not effectively inhibit distortion brought by an input end; the dimming is mainly realized by changing the current flowing through the LED, and under the condition of different currents, the luminous wavelength is different, so that the luminous efficiency is influenced, and therefore, the circuits have the defects of weak anti-interference capability, poor output stability, low output precision, low power factor and the like.
Disclosure of Invention
The purpose of the invention is realized by the following technical scheme.
According to an embodiment of the present invention, there is provided a general energy-saving LED driving power supply device, including: the device comprises a switch conversion unit, a driving switch power supply unit, an independent circulation control unit, an analog photoelectric isolation unit, a current stabilization power supply output unit, a voltage detection unit, a current detection unit, a simulation power calculation unit, a current stabilization control unit and a pulse width modulation light regulation unit; wherein,
the switch converting unit connects and is connected to stationary flow power supply output unit, and drive switch power supply unit is connected to switch converting unit's output, and independent circulation control unit, simulation optoelectronic isolation unit, stationary flow control unit, pulse width modulation light regulating unit are connected respectively to drive switch power supply unit's output, and the output of simulation optoelectronic isolation unit passes through independent circulation control unit connecting switch converting unit, voltage detection unit and current detection unit are still connected respectively to stationary flow power supply output unit's output, voltage detection unit and current detection unit's output connection simulation power calculation unit, the output connection switch converting unit of simulation power calculation unit, pulse width modulation light regulating unit is connected to stationary flow power supply output unit through stationary flow control unit.
According to the embodiment of the invention, an EMI filtering unit and a DC conversion unit are further arranged in front of the switch conversion unit, and the EMI filtering unit and the DC conversion unit are sequentially connected with the switch conversion unit.
According to the embodiment of the invention, a wireless transceiving unit is further arranged, and the wireless transceiving unit is connected with the pulse width modulation light adjusting unit.
According to the embodiment of the invention, alternating current passes through an EMI filtering unit and a direct current conversion unit and then is output to a switch conversion unit, a simulation photoelectric isolation unit inputs the detected output voltage of a driving switch power supply unit to an independent circulation control unit through simulation photoelectric isolation, the driving switch power supply unit respectively supplies power to the independent circulation control unit, the simulation photoelectric isolation unit, a steady flow control unit and a pulse width modulation light adjusting unit, the independent circulation control unit controls the switch conversion unit to output expected voltage, the steady flow control unit controls the steady flow power supply output unit to output expected current, the pulse width modulation light adjusting unit receives a remote control dimming signal received by a wireless transceiving unit and performs dimming operation on an LED through the steady flow control unit; the voltage detection unit and the current detection unit respectively detect the output voltage and the current of the current stabilization power supply output unit, the simulation power calculation unit calculates the simulation driving power according to the detected voltage and current, and sends the simulation driving power value to the switch conversion unit to correct the output power.
According to the embodiment of the invention, the independent loop control unit comprises a linear proportional-integral regulating circuit, an amplifying circuit, an adding circuit, an initializing circuit, a comparing circuit and a reset-set trigger circuit, and obtains a reference voltage signal from the driving switch power supply unit through resistance voltage division.
The universal energy-saving LED driving power supply device is provided with the independent circulation control unit, so that the voltage precision can be controlled in a very small range, and the voltage distortion can be effectively inhibited; the current stabilization control unit is arranged, so that the current can maintain linear continuity; a simulation power calculation unit is arranged to perform simulation calculation on the output driving power, and the output power can be corrected; the whole circuit has strong anti-interference capability, stable output and higher electric energy utilization rate.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic structural diagram of a general energy-saving LED driving power supply device according to an embodiment of the invention;
FIG. 2 illustrates a circuit schematic of a switching conversion cell according to an embodiment of the present invention;
FIG. 3 illustrates a circuit schematic of an independent loop control unit according to an embodiment of the present invention;
FIG. 4 shows a schematic diagram of a current stabilization control unit circuit according to an embodiment of the invention;
FIG. 5 illustrates a circuit schematic of an EMI filtering unit according to an embodiment of the present invention;
FIG. 6 is a schematic circuit diagram of a PWM light adjusting unit according to an embodiment of the present invention
FIG. 7 shows a schematic circuit diagram of an analog photo-isolation unit according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a voltage detection unit circuit according to an embodiment of the present invention;
FIG. 9 is a schematic circuit diagram of a current sensing unit according to an embodiment of the present invention;
FIG. 10 shows a circuit schematic of a simulated power calculation unit according to an embodiment of the invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
According to an embodiment of the present invention, there is provided a general energy-saving LED driving power supply device, as shown in fig. 1, the LED driving power supply including: the power supply comprises an EMI filtering unit, a direct current conversion unit, a switch conversion unit, a driving switch power supply unit, an independent circulation control unit, an analog photoelectric isolation unit, a steady-current power supply output unit, a voltage detection unit, a current detection unit, a simulation power calculation unit, a steady-current control unit, a pulse width modulation light regulation unit and a wireless transceiving unit; wherein,
the EMI filtering unit, the direct current conversion unit and the switch conversion unit are sequentially connected and connected to the stabilized current power supply output unit, the output end of the switch conversion unit is connected with the driving switch power supply unit, the output of the driving switch power supply unit is respectively connected with the independent circulation control unit, the analog photoelectric isolation unit, the stabilized current control unit and the pulse width modulation light regulation unit, the output end of the analog photoelectric isolation unit is connected with the switch conversion unit through the independent circulation control unit, the output of the stabilized current power supply output unit is also respectively connected with the voltage detection unit and the current detection unit, the outputs of the voltage detection unit and the current detection unit are connected with the simulation power calculation unit, the output of the simulation power calculation unit is connected with the switch conversion unit, and the pulse width modulation light regulation unit is connected to the stabilized current power supply output; the wireless transceiving unit is connected with the pulse width modulation light adjusting unit; the LED dimming circuit comprises an EMI filtering unit, a DC conversion unit, a driving switch power supply unit, an independent circulation control unit, a drive switch power supply unit, a current stabilization control unit and a pulse width modulation light regulation unit, wherein alternating current passes through the EMI filtering unit and the DC conversion unit and then is output to the switch conversion unit, the analog photoelectric isolation unit inputs the detected output voltage of the driving switch power supply unit to the independent circulation control unit through analog photoelectric isolation, the driving switch power supply unit supplies power to the independent circulation control unit, the analog photoelectric isolation unit, the current stabilization control unit and the pulse width modulation light regulation unit respectively, the independent circulation control unit controls the switch conversion unit to output expected voltage, the current stabilization control unit controls the current stabilization power supply output unit to output expected current, and the pulse; the voltage detection unit and the current detection unit respectively detect the output voltage and the current of the current stabilization power supply output unit, the simulation power calculation unit calculates the simulation driving power according to the detected voltage and current, and sends the simulation driving power value to the switch conversion unit to correct the output power.
As shown in fig. 2, the switch conversion unit includes a chip U1, a field effect transistor VT, a transformer T, a winding La, a winding Lb, a winding Lc, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16, a capacitor C17, a diode D17, an inductor L17, and an inductor L17; pin 1 of the chip U1 is connected to one end of a capacitor C4 and one end of a resistor R1 to serve as a detection return input terminal V1 of the switching unit, pin 2 is connected to one end of a resistor R2, pin 9 is connected to the other end of a resistor R1, one end of a resistor R3, and one end of a capacitor C5, pin 7 is connected to one end of a resistor R4, pin 5 is connected to the other end of a resistor R4 and one end of a capacitor C6, pin 6 is connected to one end of a resistor R5, pin 8 is connected to the positive electrode of a capacitor C7, pin 13 is connected to one end of a pin 15, one end of a resistor R6, the positive electrode of a capacitor C8, and one end of an inductor L3 to serve as a power supply, pin 16 is connected to the other end of a resistor R2 and one end of a capacitor C9, pin 11 is connected to one end of a resistor R7, pin 10 is connected to one end of a capacitor C10 and one end of a resistor R8, pin 12 is connected to one end of a resistor R56, the other end of the capacitor C9, the negative electrode of the capacitor C7, the other end of the resistor R5, the other end of the capacitor C6, the other end of the capacitor C5 and one end of the capacitor C11 are connected and then grounded, and other pins are overhead; the other end of the inductor L3 is connected with the cathode of the diode D5 and one end of the capacitor C12; the transformer is composed of three windings, one end of a winding La is connected with the anode of a diode D6, one end of a resistor R10, one end of a capacitor C13, the other end of a resistor R6 and the other end of a capacitor C11 and then connected with the output end of the direct current conversion unit, the other end of the winding La is connected with the anode of a diode D7 and the drain of a field effect transistor VT, one end of a winding Lb is connected with the anode of a diode D8, the other end of the winding Lb is connected with the cathode of a capacitor C14, one end of a capacitor C15, the cathode of a capacitor C16, the cathode of a capacitor C17, one end of a capacitor C18 and one end of a capacitor C19 and then connected with an output interface J4 of the switching unit, one end of a winding Lc is connected with the anode of a diode D9, the other end of the winding Lc is connected with the cathode of a capacitor C20, the other end of a capacitor C12, the other end of a capacitor C19 and the cathode of; the grid of the field effect transistor VT is connected with the other end of the resistor R7, and the source is connected with the other end of the resistor R8 and the other end of the resistor R9 to be used as an output end V2 of the switch conversion unit; the cathode of the diode D8 is connected with the anode of the capacitor C14, one end of the capacitor C15, the anode of the capacitor C16 and one end of the inductor L4; the other end of the inductor L4 is connected with the anode of the capacitor C17 and the other end of the capacitor C18 and then is used as an output interface J5 of the switch conversion unit; the cathode of the diode D9 is connected with the anode of the capacitor C20, the anode of the diode D5 and one end of the resistor R11 to serve as the other output end V3 of the switch conversion unit; the other end of the resistor R11 is connected to the anode of the diode D10.
The stabilized current power supply output unit comprises a Hall current sensing circuit CHB-25NP/SP5, an on-off triode Q1, a load D4, an energy storage inductor L3 and a Schottky diode D5, wherein the inductor L3 and the Schottky diode D5 play a role of continuous current during the turn-off period of the on-off triode Q1. The detection current precision of the Hall current sensing circuit CHB-25NP/SP5 is within 0.8%, the output current can be accurately measured and returned to the current stabilization control unit, and meanwhile, the output current is isolated from the control circuit.
The independent circulation control unit comprises a linear proportional integral regulating circuit, an N1/N2 times amplifying circuit (N1/N2 is the turn ratio of the voltage output side of the voltage input side of the transformer), an adding circuit, an initializing circuit, a comparing circuit and a reset set triggering circuit, wherein the linear proportional integral regulating circuit, the N1/N2 times amplifying circuit and the adding circuit are all composed of amplifiers and peripheral circuits thereof, the initializing circuit is composed of the amplifiers, a reset switch and the peripheral circuits, the comparing circuit is composed of a comparator, and the reset set triggering circuit is composed of a reset set trigger and a clock pulse generator. The independent circulation control unit obtains a reference voltage signal from the driving switch power supply unit through resistance voltage division. As shown in fig. 3, the voltage reference terminal Vref of the independent loop control unit IS connected in series with a resistor R18 and then respectively connected to the 3 pin of the amplifier U1A and a resistor R16, the other end of the resistor R16 IS connected in series with a capacitor C16 and then connected to GND 16, the return voltage VC 16 IS connected in series with the resistor R16 and then connected to the 2 pin of the amplifier U1 16, the 2 pin of the amplifier IS connected to the resistor R16, the resistor R16 IS connected in series with the capacitor C16 and then connected to the 1 pin of the amplifier U1 16, the 1 pin of the amplifier U1 16 IS connected to the 5 pin of the amplifier U1 16, the 6 pin of the amplifier U1 16 IS connected to one end of the resistor R16 and connected to GND 16 through the resistor R16, the other end of the resistor R16 IS connected to the 7 pin of the amplifier U1 16, the 7 pin of the amplifier U1 16 IS connected to the 10 pin of the amplifier U1 16 through the resistor R16, the 10 pin of the amplifier U1 16 IS connected to GND 16 through the resistor R16, the input current detection terminal IS, two ends of the resistor R28 are respectively connected with the pins 8 and 9 of the amplifier U1C, the pin 8 of the amplifier U1C is connected with the pin 12 of the amplifier U1D through the resistor R21, the pin 12 is grounded GND1, the resistor R17 is connected with the capacitor C11 in series and then connected with the pins 12 and 14 of the amplifier U1D after being connected with the reset switch S1 in parallel, the resistor R26, one end of the serially connected R27 is connected with a 14 pin of an amplifier U1D, the other end of the serially connected R27 is connected with a GND1, the connection ends of a resistor R26 and a resistor R27 are connected with a 13 end of an amplifier U1D, the 14 pin of the amplifier U1D is connected with a 3 pin of a comparator U2A through a resistor R22, the 7 pin of the amplifier U1B is connected with a 2 pin of a comparator U2A through a resistor R25, a 1 pin of a comparator U2A is connected with an RN end of a reset set trigger, an SN end of the reset set trigger is connected with a clock pulse signal, a QN end of the reset set trigger is connected with a reset end of a reset switch S1, and a Q end of the reset set trigger is connected with a. The independent circulation control unit is connected with the current sampling resistor of the switch conversion unit, samples the input current of the switch conversion unit, and adjusts the control signal according to the sampling signal. The independent circulation control unit samples the output voltage through the analog photoelectric isolation unit and adjusts the control signal according to the sampling signal. The independent circulation control unit controls the switch conversion unit, input distortion can be effectively inhibited, the precision and the response speed of output voltage are improved, a signal for controlling the on-off of the on-off triode Q1 is obtained according to an expected voltage signal by sampling an input current signal and an output voltage signal, and when the input voltage has distortion, the average value of the output voltage can be equal to a reference value in a switching period, so that the input distortion is inhibited.
The independent circulation control unit controls the output voltage, the voltage precision can be controlled within 1%, the output voltage can be equal to a voltage reference value in a switching period under the condition that the input end voltage is distorted, and the influence caused by the distortion of the input voltage is effectively inhibited.
The current stabilization control unit comprises a subtraction circuit, a linear proportional-integral regulating circuit, a proportional regulating circuit, a comparison circuit, a NAND gate and a photoelectric isolation circuit. The subtracting circuit, the linear proportional integral regulating circuit are composed of an amplifier and a peripheral circuit thereof, the proportional regulating circuit is composed of an amplifier, an amplitude limiter and a peripheral circuit, and the comparing circuit is composed of a comparator, a triangular wave generator and a peripheral circuit. And the current stabilization control unit obtains the magnitude of the output reference current from the driving switch power supply unit through resistance voltage division. As shown in fig. 4, the desired load current terminal IS-O of the current stabilization control unit IS connected to the 3 pin of the amplifier U4A through a resistor R33, the 3 pin of the amplifier U4A IS connected to GND3 through a resistor R39, the 2 pin of the amplifier U4A IS connected to the 8 pin of the amplifier U4C through a resistor R37, and the resistor R41 IS connected in parallel to the 1 and 2 pins of the amplifier U4A. The 1 pin of the amplifier U4A IS connected to the 5 pin of the amplifier U4B through a resistor R35, the resistor R32 IS connected in series with a capacitor C13, one end of the resistor IS grounded GND3, the other end IS connected to the 5 pin of the amplifier U4B, the load current IS-O IS connected to the 6 pin of the amplifier U4B through a resistor R B, the capacitor C B IS connected in series with the resistor R B and then connected in parallel to the 6 and 7 pins of the amplifier U4B, the 7 pin of the amplifier U4B IS connected to GND B through a resistor R B, the load current IS-O IS connected to the 10 pin of the amplifier U4B through a resistor R B and simultaneously connected to the input end of an integrating limiter JF B, the output end of the integrating limiter JF B IS connected to the 9 pin of the amplifier U4B through a resistor R B, the 8 pin of the amplifier U4B IS connected to the 3 pin of the comparator U7B through a resistor R B, one end of the resistor R B IS connected to the NAND gate B after the resistor R B IS connected in series with a triangular SJ 36, the pulse width modulation input end is connected to the A end of the NAND gate U5, the output end Y of the NAND gate U5 is connected to the cathode end of the light emitting diode of the photoelectric isolation circuit U6 through a resistor R44, the anode end of the light emitting diode is grounded GND3, the second driving switch power supply VCC2 is connected to the collector of the triode through a resistor R43, the collector output is connected to the grid of the on-off triode Q2, and the emitter is grounded GND 2.
The current stabilization control unit adopts an anti-saturation controller, and the anti-saturation can effectively prevent the integral saturation phenomenon from occurring in the control process, so that the controller maintains linear continuity, and the purposes of constant output current and improving control precision are achieved. The current stabilizing control unit adopts a condition effect technology anti-saturation algorithm, so that the current of the current stabilizing power supply output unit maintains linear continuity, overshoot is reduced, the control precision is improved, the system has better dynamic quality and steady-state precision, and the precision of the output current is improved.
As shown in fig. 5, the ac input terminal ACI + of the EMI filter unit is connected to the left upper end of the common mode choke T2 through the shock resistance RT1, the ac input terminal ACI-is connected to the left lower end of the common mode choke T1 through the fuse F1, and the varistor R47 is connected in parallel to the safety capacitor C15 and then connected in parallel to the left upper end and the left lower end of the common mode choke T2. The upper right end and the lower right end of the common mode choke coil T2 are connected with a safety capacitor C16 in parallel and then are respectively connected with an alternating current output end ACO + and an alternating current output end ACO-.
The pulse width modulation light adjusting unit comprises a 555 timer, resistors R51 and R53, a variable resistor R52, diodes D13 and D14, and capacitors C17 and C18, and the duty ratio of output pulses can be adjusted by adjusting the size of the variable resistor R52, so that the purpose of dimming is achieved. As shown in fig. 6, the third driving switching power VCC3 is respectively connected to pins 4 and 8 of the 555 timer U11 and one end of a resistor R51, the other end of the resistor R51 is connected to one end of a variable resistor R52, the other end of the variable resistor R52 is connected to the cathode of a diode D14, the middle end of the variable resistor R52 is connected to the pin 7 of the 555 timer and the anode of a diode D13, the cathode of the diode D13 and the anode of the diode D14 are connected to one end of pins 6 and 2 of the 555 timer and a capacitor C18, the other end of the capacitor C18 is connected to the GND3, one end of the capacitor C17 is connected to the pin 5 of the 555 timer U11, the other end of the capacitor C5392 is connected to the GND3, the pin 1 of the 555 timer U11 is connected to the GND3, and the.
The analog photoelectric isolation unit comprises a linear photoelectric isolation circuit HCNR201, an input resistor R50, a feedback resistor R48 and a voltage-stabilizing adjusting resistor R49, and the detected output voltage is input to the VC1 end of the independent circulation control unit through analog photoelectric isolation. As shown in fig. 7, the detection voltage Vin is connected to the 2 pin of the amplifier U8A and the 3 pin of the photoelectric isolation circuit U9 through a resistor R50, the 3 pin of the amplifier U8A is grounded to GND2, the 1 pin is connected to the 1 pin of the photoelectric isolation circuit U9 through a resistor R49, the 4 and 5 pins of the photoelectric isolation circuit U9 are grounded to GND2, the 2 pins are connected to VCC2, the 7 and 8 pins are floating, the 6 pin is connected to the 2 pin of the amplifier U10A, the 2 pin of the amplifier U10A is connected to the 1 pin of the amplifier U10A through a resistor R48 to output a return voltage VC1, and the 3 pin of the amplifier U10A is grounded to GND 1.
The detection voltage Vin returns to the independent circulation control unit after being isolated by the photoelectric isolation circuit U9, so that the main circuit and the control circuit are effectively isolated. In actual operation, the resistance values of R50 and R48 can be equal in the design process of the photoelectric isolation circuit, and input and output equal-size isolation can be realized.
As shown in fig. 8, the voltage detection unit includes a resistor R12, a resistor R13, and a sliding varistor Rx; one end of the resistor R12 is connected with one end of the sliding variable resistor Rx, the other end of the resistor R12 is grounded, the other end of the sliding variable resistor Rx is connected with one end of the resistor R13, the sliding end serves as the output end of the voltage detection unit, and the other end of the resistor R13 is connected with the output end of the constant current power supply output unit.
As shown in fig. 9, the current detection unit includes an amplifier U2, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a resistor R19, a resistor R20, a capacitor C21, a capacitor C22, a capacitor C23, and an inductor L5; pin 1 of the amplifier U2 is connected to one end of a resistor R14, one end of a resistor R15 and one end of a capacitor C21, pin 2 is connected to one end of a resistor R16, pin 3 is connected to the other end of a resistor R15, the other end of a capacitor C21 and one end of a resistor R17, pin 4 is grounded, pin 5 is connected to the other end of a resistor R14, pin 6 is connected to one end of a resistor R18, one end of a resistor R19 and one end of a capacitor C22, pin 7 is connected to the other end of a resistor R18 and the other end of a capacitor C22 and then serves as an output end of a current detection unit, and pin 8 is connected to a power supply; the other end of the resistor R16 is connected with one end of a resistor R20, one end of a capacitor C23 and one end of an inductor L5; the other end of the resistor R20 is connected with the other end of the capacitor C23 and then grounded; the other end of the resistor R19 and the other end of the resistor R17 are both grounded; the other end of the inductor L5 is connected with the output end of the constant current power supply output unit.
As shown in fig. 10, the simulated power calculating unit includes a simulated multiplication circuit U3, a resistor R21, a resistor R22, a resistor R23; pin 1 of the simulation multiplication circuit U3 is connected with the output end of the current detection unit, pin 2 is connected with pin 4, pin 5 and one end of a resistor R21 and then grounded, pin 3 is connected with the output end of the voltage detection unit, pin 6 is connected with the other end of the resistor R21, one end of the resistor R22 and one end of the resistor R23, pin 7 is connected with the other end of the resistor R23, and pin 8 is connected with the power supply; the other end of the resistor R22 is connected to a return input V1 of the switching unit.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. A general energy-saving LED driving power supply device, the LED driving power supply comprises: the device comprises a switch conversion unit, a driving switch power supply unit, an independent circulation control unit, an analog photoelectric isolation unit, a current stabilization power supply output unit, a voltage detection unit, a current detection unit, a simulation power calculation unit, a current stabilization control unit and a pulse width modulation light regulation unit; wherein,
the switch converting unit connects and is connected to stationary flow power supply output unit, and drive switch power supply unit is connected to switch converting unit's output, and independent circulation control unit, simulation optoelectronic isolation unit, stationary flow control unit, pulse width modulation light regulating unit are connected respectively to drive switch power supply unit's output, and the output of simulation optoelectronic isolation unit passes through independent circulation control unit connecting switch converting unit, voltage detection unit and current detection unit are still connected respectively to stationary flow power supply output unit's output, voltage detection unit and current detection unit's output connection simulation power calculation unit, the output connection switch converting unit of simulation power calculation unit, pulse width modulation light regulating unit is connected to stationary flow power supply output unit through stationary flow control unit.
2. The apparatus as claimed in claim 1, wherein an EMI filter unit and a dc converter unit are further disposed before the switching converter unit, and the EMI filter unit and the dc converter unit are sequentially connected to the switching converter unit.
3. The device as claimed in claim 2, further comprising a wireless transceiver unit, wherein the wireless transceiver unit is connected to the pwm light adjusting unit.
4. The device as claimed in claim 3, wherein the ac power is output to the switching unit after passing through the EMI filter unit and the dc converter unit, the analog optoelectronic isolator unit inputs the detected output voltage of the driving switching power supply unit to the independent circulation control unit through the analog optoelectronic isolator, the driving switching power supply unit supplies power to the independent circulation control unit, the analog optoelectronic isolator unit, the steady-current control unit, and the pwm light control unit, respectively, the independent circulation control unit controls the switching unit to output the desired voltage, the steady-current control unit controls the steady-current power supply output unit to output the desired current, the pwm light control unit receives the remote dimming signal received by the wireless transceiver unit, and the steady-current control unit performs the dimming operation on the LED; the voltage detection unit and the current detection unit respectively detect the output voltage and the current of the current stabilization power supply output unit, the simulation power calculation unit calculates the simulation driving power according to the detected voltage and current, and sends the simulation driving power value to the switch conversion unit to correct the output power.
5. The apparatus of claim 4, wherein the independent loop control unit comprises a linear proportional-integral regulating circuit, an amplifying circuit, an adding circuit, an initializing circuit, a comparing circuit and a reset-set trigger circuit, and the independent loop control unit obtains a reference voltage signal from the driving switch power supply unit through resistance voltage division.
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| CN201510006250.0A CN104507239A (en) | 2015-01-06 | 2015-01-06 | General energy-saving LED (light-emitting diode) drive power supply device |
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| CN201510006250.0A CN104507239A (en) | 2015-01-06 | 2015-01-06 | General energy-saving LED (light-emitting diode) drive power supply device |
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| CN104507239A true CN104507239A (en) | 2015-04-08 |
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| CN201510006250.0A Pending CN104507239A (en) | 2015-01-06 | 2015-01-06 | General energy-saving LED (light-emitting diode) drive power supply device |
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Application publication date: 20150408 |