CN118695430A - Parameter configuration circuit and LED drive board - Google Patents

Abstract

The invention relates to the technical field of driving circuits, and discloses a parameter configuration circuit and an LED driving board, wherein the parameter configuration circuit comprises: the system comprises an enabling control module and a parameter configuration module, wherein a first end of the enabling control module is connected with a power supply, a second end of the enabling control module is connected with an enabling end of the parameter configuration module and is used for providing a plurality of enabling signals for the parameter configuration module, the enabling signals are determined by working voltage of equipment to be driven, and the enabling signals are used for determining resistance values of the parameter configuration module; the parameter configuration module is used for selecting the corresponding resistance value according to the enabling signal and configuring the driving parameter of the equipment to be driven, wherein the driving parameter of the equipment to be driven is the driving voltage. According to the invention, the enabling signal is determined according to the working voltage of the equipment to be driven, and the driving parameters are configured in the parameter configuration module by utilizing the enabling signal, so that the PCBA of the parameter configuration circuit is completely compatible with different equipment to be driven, and the production efficiency and compatibility of the parameter configuration circuit are improved.

Description

Parameter configuration circuit and LED drive board

Technical Field

The invention relates to the technical field of driving circuits, in particular to a parameter configuration circuit and an LED driving board.

Background

For an electronic endoscope cold light source system using LEDs as light sources, multiple LED lamps are needed to synthesize the required spectrum, so that a driving power supply circuit for multiple LEDs needs to be provided. In order to cope with the driving requirement of a plurality of LED lamps, the influence of the existing electronic endoscope cold light source system on the difference of the LED lamps is mainly realized by adopting the following circuit processing scheme: 1. different driving printed circuit boards (PCB for short) are adopted for the driving circuit of each LED; 2. the PCB of multichannel LED is compatible design, and the components and parts of different parameters are adopted to the LED of different colours for the PCBA of multichannel LED can't be compatible.

Because the cold light source system needs LEDs with different colors to synthesize the required spectrum, the performance difference of the LEDs with different colors is larger (the main reflected parameters are working voltage and current), and if the driving circuits of the multiple LEDs do not do differential treatment, the requirements of the performance of the cold light source system are hardly met; if the differentiation processing is performed, the driving circuit of the LED increases as the number of the LEDs increases. Because PCBA is incompatible, not only be unfavorable for production packaging efficiency's improvement, also can bring the risk of misloading simultaneously, and then increase management and manufacturing cost.

Disclosure of Invention

In view of the above, the invention provides a parameter configuration circuit and an LED driving board, so as to solve the problem that PCBA is incompatible due to different parameter configurations in the same LED driving board.

In a first aspect, the present invention provides a parameter configuration circuit comprising: an enabling control module, a parameter configuration module, wherein,

The first end of the enabling control module is connected with the power supply, the second end of the enabling control module is connected with the enabling end of the parameter configuration module and is used for providing a plurality of enabling signals for the parameter configuration module, the enabling signals are determined by the working voltage of equipment to be driven, and the enabling signals are used for determining the resistance value of the parameter configuration module;

The parameter configuration module is used for selecting the corresponding resistance value according to the enabling signal and configuring the driving parameter of the equipment to be driven, wherein the driving parameter of the equipment to be driven is the driving voltage.

According to the parameter configuration circuit provided by the invention, the enabling signal is determined according to the working voltage of the equipment to be driven, and the driving parameters are configured in the parameter configuration module by utilizing the enabling signal, so that the PCBA of the parameter configuration circuit is completely compatible with different equipment to be driven, and the production efficiency and compatibility of the parameter configuration circuit are improved.

In an alternative embodiment, the enabling control module includes: and the first end of each enabling circuit is connected with the power supply respectively, the second end of each enabling circuit outputs different enabling signals, and the resistance values of the parameter configuration modules obtained by the different enabling signals are different.

According to the parameter configuration circuit provided by the invention, the enabling control module outputs the enabling signals through the output ends of the plurality of enabling circuits, when the enabling control module and the parameter configuration module are connected through the connector, the second ends of different enabling circuits are connected with different pins of the connector, and different driving parameters in the parameter configuration module are selected, so that the compatibility and the flexibility of the parameter configuration module are improved.

In an alternative embodiment, each enabling circuit comprises:

and the first end of the first resistor is connected with the power supply, and the second end of the first resistor is connected with the enabling end of the parameter configuration module and is used for keeping the enabling signal at a high level and limiting the output current of the enabling circuit.

According to the parameter configuration circuit provided by the invention, the enabling circuit outputs the enabling signal through the pull-up resistor respectively, so that the output current of the enabling circuit is limited while the enabling signal is provided for the parameter configuration module, the electronic devices in the parameter configuration circuit are prevented from being damaged, and the reliability and the stability of the parameter configuration circuit are improved.

In an alternative embodiment, the enabling circuit comprises: and the different enabling circuits are connected with the enabling ends of the parameter configuration module through different pins of the corresponding connector.

According to the parameter configuration circuit provided by the invention, the plurality of enabling signals are connected with the different pins of the corresponding connector, and the driving parameters in the parameter configuration circuit are determined by using the different pins of the connector through selecting the different enabling circuits, so that the design is convenient and flexible, and the compatibility of the enabling control circuit is improved.

In an alternative embodiment, the enabling control module includes:

and the control chip is provided with a plurality of output pins for respectively outputting a plurality of enable signals.

The parameter configuration circuit provided by the invention provides the enabling signals through the plurality of pins of the control chip, is simpler in structure, and can output different enabling signals by controlling the level of different output pins so as to select the driving parameters in the parameter configuration module, thereby being more flexible in control of the enabling signals.

In an alternative embodiment, the parameter configuration module includes: a plurality of voltage configuration circuits, a power management circuit, a voltage division circuit, wherein,

The first end of the voltage configuration circuit is connected with the second end of the enabling circuit, the second end of the voltage configuration circuit configures the working voltage of the equipment to be driven, the third end of the voltage configuration circuit is connected with the voltage feedback end of the power management circuit, and the working voltage of the equipment to be driven is the maximum working voltage of the equipment to be driven;

The input end of the power management circuit is connected with an external power supply and is used for providing reference voltages for the voltage configuration circuit and the voltage division circuit;

And the first end of the voltage dividing circuit is connected with the second end of each voltage configuration circuit, the second end of the voltage dividing circuit is connected with the voltage feedback end of the power management circuit, and the third end of the voltage dividing circuit is grounded and is used for obtaining the configuration voltage of the equipment to be driven after connecting the voltage configuration circuits with different resistance values with the voltage dividing circuit in parallel according to the enabling signal.

According to the parameter configuration circuit provided by the invention, the purpose of different enabling signals and different configuration parameters is realized by outputting the configuration voltage through whether the plurality of voltage configuration circuits input enabling signals or not, and the compatibility of the parameter configuration circuit is improved.

In an alternative embodiment, each voltage configuration circuit includes: a second resistor, a third resistor, a fourth resistor, a first transistor, a second transistor, wherein,

A second resistor, the first end of which is connected with the second end of the enabling circuit, and the second end of which is connected with the control end of the first transistor;

The first end of the third resistor is connected with the voltage feedback end of the power management circuit, and the second end of the third resistor is connected with the first end of the second transistor;

a fourth resistor having a first terminal connected to the first terminal of the first transistor and a second terminal connected to the second terminal of the second transistor;

A first transistor having a first end connected to a control end of the second transistor and a second end grounded;

A second transistor having a second terminal for outputting a configuration voltage;

when the second resistor receives the enabling signal, the first transistor is conducted, the second transistor is conducted, and the voltage configuration circuit is connected with the voltage division circuit in parallel.

According to the parameter configuration circuit provided by the invention, the voltage configuration circuit determines whether to conduct the transistor according to whether the enabling signal is input or not, so that the resistance connected with the voltage dividing circuit is changed, the voltage configuration is simple and convenient, the transistor is used as a switch, the switching speed is high, the reliability is high, and the stability of the voltage configuration circuit is improved.

In an alternative embodiment, the power management circuit includes: and the input end of the voltage stabilizing chip is connected with an external power supply, and the voltage feedback end of the voltage stabilizing chip is connected with the second end of each voltage configuration circuit and is used for providing reference voltage.

The parameter configuration circuit provided by the invention utilizes the voltage stabilizing chip to provide the reference voltage, and ensures the stable output of the reference voltage in the parameter configuration module, so that the configuration voltage output by the parameter configuration module is more stable.

In an alternative embodiment, the voltage divider circuit includes: a fifth resistor, a sixth resistor, wherein,

A fifth resistor, the first end of which is connected with the second end of each voltage configuration circuit, and the second end of which is connected with the voltage feedback end of the power management circuit;

The first end of the sixth resistor is connected with the second end of the fifth resistor, and the second end of the sixth resistor is grounded;

and after the voltage configuration circuit with the corresponding resistance value is selected according to the enabling signal, the voltage configuration circuit is connected with the fifth resistor in parallel, and then is connected with the sixth resistor in series for voltage division, and the configuration voltage of the equipment to be driven is determined according to the fifth resistor, the sixth resistor and the reference voltage.

According to the parameter configuration circuit provided by the invention, the purpose of fine tuning the output configuration voltage after the voltage configuration circuit is selected is achieved through the two resistors in the voltage dividing circuit, so that the compatibility and the flexibility of the parameter configuration module are improved.

In a second aspect, the present invention provides an LED driver board comprising the parameter configuration circuit, the power circuit, the control circuit and the interface circuit of any one of the first aspects, wherein,

The input end of the power circuit is connected with the control circuit, the output end of the power circuit is connected with the LED, and the power circuit is used for converting the power supply voltage into the working voltage of equipment to be driven according to the voltage control instruction of the control circuit;

The input end of the control circuit is connected with the output end of the parameter configuration circuit and is used for receiving and processing the configuration voltage signal and outputting a voltage control instruction according to the configuration voltage signal;

And one end of the interface circuit is connected with the control circuit, and the other end of the interface circuit is connected with the peripheral circuit and is used for transmitting signals between the control circuit and the peripheral circuit.

According to the LED driving board provided by the invention, through the parameter configuration circuit in any one of the first aspect, the compatibility of the LRD driving board is improved, so that the same LED driving board can drive LEDs with different driving voltages, the types of the LED driving boards are reduced, and the production efficiency of the LED driving board is improved.

Drawings

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

FIG. 1 is a schematic diagram of a parameter configuration circuit according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the configuration of an enable control module in a parameter configuration circuit according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of an enable control module in another parameter configuration circuit according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a configuration module in a parameter configuration circuit according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of another parameter configuration module in a parameter configuration circuit according to an embodiment of the present invention;

fig. 6 is a schematic structural view of an LED driving board according to an embodiment of the present invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The embodiment of the invention provides a parameter configuration circuit and an LED driving board, wherein driving parameters are configured through different enabling signals, so that the PCBA of the parameter configuration circuit is completely compatible with different equipment to be driven.

According to an embodiment of the present invention, there is provided a parameter configuration circuit, as shown in fig. 1, including: a control module 1 and a parameter configuration module 2 are enabled.

As shown in fig. 1, the first end of the enable control module 1 is connected to a power supply, the second end of the enable control module is connected to the enable end of the parameter configuration module 2, and is used for providing a plurality of enable signals for the parameter configuration module 2, wherein the enable signals are determined by the working voltage of the equipment to be driven, and the enable signals are used for determining the resistance value of the parameter configuration module 2.

Specifically, according to the number of LEDs required by the cold light source system of the electronic endoscope, corresponding parameters are designed in the same parameter configuration circuit, different enabling signals are provided by the enabling control module 1, so that the parameter configuration circuit automatically completes configuration of the corresponding parameters according to the enabling signals, thereby realizing the sharing of PCBAs of the parameter configuration circuit, it is to be noted that the enabling control module 1 and the parameter configuration module 2 are respectively integrated on different PCBAs, for example, the enabling control module is integrated on the PCBAs 1, the parameter configuration module 2 is integrated on the PCBAs 2, the PCBAs 1 and the PCBAs 2 are spliced through connectors, in practical application, one PCBAs 1 can correspond to a plurality of PCBAs 2, thereby forming the driving requirement of a plurality of PCBAs of LED lamps, and meanwhile, the PCBAs 2 of each LED is compatible. The enabling control module 1 provides different enabling signals to the parameter configuration module 2 by connecting different pins on the connector, which is only used as an example and not a limitation. The enabling control module 1 may output a plurality of enabling signals through different pins of the same type of connector, each enabling signal is connected to one connector, one enabling signal is selected according to the working voltage of the device to be driven, and the connector connected with the corresponding enabling signal is plugged onto the connector corresponding to the parameter configuration module 2, so as to achieve the purpose of selecting the resistance value of the parameter configuration module 2 through the enabling signal, which is only by way of example, but not by way of limitation.

As shown in fig. 1, the parameter configuration module 2 is configured to select a corresponding resistance value according to the enable signal, and configure a driving parameter of the device to be driven, where the driving parameter of the device to be driven is a driving voltage.

Specifically, the parameter configuration module 2 selects the corresponding resistance value according to the enabling signal, and further configures the driving parameters of the device to be driven, so that the parameters of the driving circuit are matched with the device to be driven, wherein the driving parameters include, but are not limited to, the magnitude of the driving voltage, and the driving voltage is more important than the driving current, the frequency and other parameters, so that the driving voltage is taken as an example only, but not limited thereto. Since the driving voltage is changed along with the current and the temperature, the cold light source system is usually provided with a plurality of gears, and the driving voltage can be regulated, so that the plurality of gears can work normally, when the driving voltage is configured, the driving voltage is configured as the maximum voltage of the equipment to be driven, and then the actual driving voltage given to the LEDs by the driving circuit is regulated through different gears, and the equipment to be driven in the cold light source system is the LEDs.

As shown in fig. 1, the enabling control module 1 and the parameter configuration module 2 can be respectively integrated on different PCBAs, and the different PCBAs are selectively plugged by connectors, so that the modularization of a circuit is realized, the production efficiency is improved, and the production cost is reduced.

According to the parameter configuration circuit provided by the embodiment, the enabling signal is determined according to the working voltage of the equipment to be driven, and then the driving parameters are configured in the parameter configuration module 2 by utilizing the enabling signal, so that PCBA of the parameter configuration circuit is completely compatible with different equipment to be driven, and the production efficiency and compatibility of the parameter configuration circuit are improved.

In some alternative embodiments, as shown in fig. 2, the enabling control module 1 includes: the first end of each of the plurality of enabling circuits, namely the first enabling circuit to the nth enabling circuit in fig. 2, is respectively connected with a power supply (namely VCC), the second end of each of the plurality of enabling circuits outputs different enabling signals, and the parameter configuration module 2 determines the resistance value of the parameter configuration module 2 according to the different enabling signals.

Specifically, the enabling control module 1 includes a plurality of enabling circuits, one enabling circuit is used for providing one enabling signal, the enabling signal output by each enabling circuit is respectively connected to different input pins of the parameter configuration module 2, and in fig. 2, the enabling circuit is connected to the parameter configuration module 2 through different pins of the connector so as to select different parameters of the parameter configuration module 2 through the enabling signals of different enabling circuits.

According to the parameter configuration circuit provided by the embodiment, the enabling control module 1 outputs enabling signals through the output ends of the enabling circuits, when the enabling control module 1 and the parameter configuration module 2 are plugged through the connector, the second ends of different enabling circuits are connected with different pins of the connector, and different driving parameters in the parameter configuration module 2 are selected, so that the compatibility and the flexibility of the parameter configuration module 2 are improved.

In some alternative embodiments, as shown in fig. 2, each enabling circuit includes: and the first end of the first resistor R1 is connected with the power supply, and the second end of the first resistor R1 is connected with the enabling end of the parameter configuration module 2 and is used for keeping the enabling signal at a high level and limiting the output current of the enabling circuit.

Specifically, the enabling circuit is connected with the power supply through a pull-up resistor, when the enabling circuit is connected with the enabling end of the parameter configuration module 2, the corresponding enabling end level in the parameter configuration module 2 is pulled up, meanwhile, the output current of the enabling circuit can be limited by utilizing the pull-up resistor, the electronic components are prevented from being damaged due to overlarge current, and the safety of the parameter configuration circuit is ensured. It should be noted that, in fig. 2, the second ends of the pull-up resistors in the different enabling circuits are connected to different pins of the connector, and are transferred to the parameter configuration module through the connector.

According to the parameter configuration circuit provided by the embodiment, the enabling circuits respectively output the enabling signals through the pull-up resistor, so that the output current of the enabling circuits is limited while the enabling signals are provided for the parameter configuration module 2, the electronic devices in the parameter configuration circuit are prevented from being damaged, and the reliability and the stability of the parameter configuration circuit are improved.

In some alternative embodiments, as shown in fig. 2, the enabling circuit includes: the connectors, namely the first connector to the nth connector, and different enabling circuits are connected with the enabling ends of the parameter configuration module 2 through different pins of the corresponding connectors.

Specifically, the output end of the enabling circuit is connected with the parameter configuration module 2 through a connector, the output ends of different enabling circuits are connected with different pins of corresponding connectors, the types of the connectors of different enabling circuits are identical, the pin functions of the connectors are defined differently, and the connectors of different enabling circuits can be connected with the connectors corresponding to the parameter configuration module 2. For example, the output end of the first enabling circuit is connected to the first pin of the first connector, the output end of the second enabling circuit is connected to the second pin of the second connector, the output end of the third enabling circuit is connected to the third pin of the third connector, the types of the first connector, the second connector and the third connector are identical, and when the parameter configuration module 2 needs the first enabling signal according to the working voltage of the device to be driven, the first connector and the connector of the parameter configuration module 2 are directly plugged, and only three enabling circuits are taken as an example, but the invention is not limited thereto.

According to the parameter configuration circuit provided by the embodiment, the plurality of enabling signals are connected with different pins of the corresponding connector, and driving parameters in the parameter configuration circuit are determined by using different pins of the connector through selecting different enabling circuits, so that the design is convenient and flexible, and the compatibility of the enabling control circuit is improved.

In some alternative embodiments, as shown in fig. 3, the enabling control module 1 includes: and the control chip is provided with a plurality of output pins for respectively outputting a plurality of enable signals.

Specifically, the pull-up resistor is not the only way to generate the enabling signal, besides the combination of the pull-up resistor and the connector, a special control chip may be used, a plurality of output pins of the control chip may output the enabling signal respectively, each output pin is connected with a different pin of the connector of the parameter configuration module 2 respectively, the different output pins output a high level or a low level through a control logic instruction inside the control chip, the high level is the enabling signal of the parameter configuration module 2, only a plurality of output pins of the control chip are drawn in fig. 3, and when a first output pin (i.e. "1" in the figure) of the control chip outputs the high level, and other output pins are low level or suspended, the control chip outputs the first enabling signal. The control chip may be a single chip microcomputer or a field programmable gate array, and its peripheral circuit is designed according to the specific model of the control chip, which is not described herein again, but is not limited thereto.

According to the parameter configuration circuit provided by the embodiment, the enable signals are provided through the plurality of pins of the control chip, the structure is simpler, different enable signals are output through controlling the level of different output pins, so that the driving parameters in the parameter configuration module 2 are selected, and the control of the enable signals is more flexible.

In some alternative embodiments, as shown in fig. 4, the parameter configuration module 2 includes: the plurality of voltage configuration circuits 21, the power management circuit 22, and the voltage division circuit 23 are different in resistance value from one voltage configuration circuit 21 to another.

As shown in fig. 4, the first end of the voltage configuration circuit 21 is connected to the second end of the enabling circuit, the second end of the voltage configuration circuit configures the operating voltage of the device to be driven, the third end of the voltage configuration circuit is connected to the voltage feedback end of the power management circuit 22, and the operating voltage of the device to be driven is the maximum operating voltage of the device to be driven.

Specifically, when designing the PCBA, the same PCBA includes a plurality of voltage configuration circuits 21, the enable ends of the voltage configuration circuits 21 are connected to different pins of the connector, when the enable signal of the enable control module 1 is input to the enable ends of the different voltage configuration circuits 21, the different voltage configuration circuits 21 are connected to different resistances of the parameter configuration module 2, and the voltage configuration circuits 21 with different resistances are selected by the enable signal to configure different working voltages.

As shown in fig. 4, the input terminal of the power management circuit 22 is connected to an external power source for providing a reference voltage to the voltage configuration circuit 21 and the voltage dividing circuit 23.

Specifically, the power management circuit 22 may be a voltage stabilizing chip, and the reference voltage pins thereof may output a stable reference voltage, only the reference voltage pins are shown in fig. 4, and other peripheral circuits are determined according to the type of the voltage stabilizing chip, which is not described herein. The principle of voltage change regulation is based on a switching voltage stabilizing chip on the market, and the set output voltage is realized through a voltage dividing resistor (or a voltage dividing circuit 23) hung on a reference voltage pin. In some alternative embodiments, the power management circuit 22 includes: the voltage stabilizing chip has its input end connected to an external power supply and its voltage feedback end connected to the second end of each voltage configuration circuit 21 for providing a reference voltage.

According to the parameter configuration circuit provided by the embodiment, the voltage stabilizing chip is used for providing the reference voltage, and stable output of the reference voltage in the parameter configuration module 2 is ensured, so that the configuration voltage output by the parameter configuration module 2 is more stable.

As shown in fig. 4, the voltage dividing circuit 23 has a first end connected to the second end of each voltage configuration circuit 21, a second end connected to the voltage feedback end of the power management circuit 22, and a third end grounded, and is configured to connect the voltage configuration circuit 21 with a corresponding resistance value in parallel with the voltage dividing circuit 23 according to an enable signal, and obtain a configuration voltage of the device to be driven.

In some alternative embodiments, as shown in fig. 5, the voltage dividing circuit 23 includes: the fifth resistor R5, the sixth resistor R6, and the fifth resistor have a first terminal connected to the second terminal (i.e., VO in fig. 5) of each voltage configuration circuit 21, and a second terminal connected to the voltage feedback terminal (i.e., FB in fig. 5) of the power management circuit 22. And the first end of the sixth resistor is connected with the second end of the fifth resistor, and the second end of the sixth resistor is grounded.

The voltage configuration circuit 21 with the corresponding resistance value selected according to the enabling signal is connected in parallel with the fifth resistor R5, then is connected in series with the sixth resistor R6 to divide voltage, and determines the configuration voltage of the equipment to be driven according to the magnitudes of the fifth resistor R5, the sixth resistor R6 and the reference voltage.

According to the parameter configuration circuit provided by the embodiment, the purpose that different enabling signals are configured with different parameters is achieved by outputting the configuration voltage through whether the enabling signals are input by the plurality of voltage configuration circuits 21, and the compatibility of the parameter configuration circuit is improved.

In some alternative embodiments, as shown in fig. 5, each voltage configuration circuit 21 includes: the second resistor R2, the third resistor R3, the fourth resistor R4, the first transistor Q1 and the second transistor Q2.

As shown in fig. 5, the first terminal of the second resistor R2 is connected to the second terminal of the enabling circuit, and the second terminal is connected to the control terminal of the first transistor Q1.

As shown in fig. 5, the first terminal of the third resistor R3 is connected to the voltage feedback terminal of the power management circuit 22, and the second terminal thereof is connected to the first terminal of the second transistor Q2.

As shown in fig. 5, the first terminal of the fourth resistor R4 is connected to the first terminal of the first transistor Q1, and the second terminal thereof is connected to the second terminal of the second transistor Q2.

As shown in fig. 5, a first terminal of the first transistor Q1 is connected to the control terminal of the second transistor Q2, and a second terminal thereof is grounded.

As shown in fig. 5, the second terminal of the second transistor Q2 outputs the configuration voltage.

When the second resistor R2 receives the enable signal, the first transistor Q1 is turned on, the second transistor Q2 is turned on, and the voltage configuration circuit 21 is connected in parallel with the voltage dividing circuit 23.

Specifically, the parameter configuration module 2 selects the voltage configuration circuits 21 by enabling signals, each voltage configuration circuit 21 being different in resistance value of the third resistor R3, in FIG. 5, R3-1, R3-2, & R3-n are different resistances, and after the enabling signal is connected, the third resistor R3 is connected in parallel with the fifth resistor R5, and by selecting different resistances of the third resistor R3, a plurality of operating voltages are configured. When the enabling signal is connected to the voltage configuration circuit 21, the gate of the first transistor Q1 obtains a high level, so that the first transistor Q1 is turned on, and then the second transistor Q2 is also turned on, so that the third resistor R3 is connected in parallel with the fifth resistor R5, and further the configured working voltage is matched with the working voltage of the device to be driven. For example, when the device to be driven is an LED, the maximum operating voltage of the LED with different colors does not pass, the maximum voltage required for red light operation is 3V, and the maximum voltage required for white light operation is 4V, then the voltage configuration circuit 21 is determined by selecting the enable signal, so that the voltage configured by the parameter configuration circuit can be automatically changed, which is only by way of example, but not limited thereto.

According to the parameter configuration circuit provided by the embodiment, the voltage configuration circuit 21 determines whether to turn on the transistor according to whether the enabling signal is input or not, so that the resistance connected with the voltage division circuit 23 is changed, the voltage configuration is simple and convenient, the transistor is used as a switch, the switching speed is high, the reliability is high, and the stability of the voltage configuration circuit 21 is improved.

The present embodiment provides an LED driving board, as shown in fig. 6, where the LED driving board includes the parameter configuration circuit, the power circuit, the control circuit, and the interface circuit of any of the foregoing embodiments and any of the optional embodiments thereof.

As shown in fig. 6, the input end of the power circuit is connected with the control circuit, and the output end of the power circuit is connected with the LED and is used for converting the power supply voltage into the working voltage of the equipment to be driven according to the voltage control instruction of the control circuit.

As shown in fig. 6, the input end of the control circuit is connected with the output end of the parameter configuration circuit, and is used for receiving and processing the configuration voltage signal and outputting a voltage control command according to the configuration voltage signal.

As shown in fig. 6, one end of the interface circuit is connected with the control circuit, and the other end is connected with the peripheral circuit for transmitting signals between the control circuit and the peripheral circuit.

Specifically, the LED driving board mainly provides working voltage for the LEDs to drive the LEDs to work, wherein the parameter configuration circuit is used for carrying out parameter configuration according to the working voltage of the LEDs, then the control circuit sends the configured parameters to the power circuit through parameter configuration instructions, and the power circuit is configured to be in accordance with the working state of the corresponding LEDs according to the parameter configuration instructions and outputs the working voltage of equipment to be driven. The parameter configuration is only described by the configuration of the working voltage, and other parameters such as current, frequency and the like may be available in practical application, and the principle is similar to the voltage configuration and will not be repeated here.

According to the LED driving board provided by the embodiment, through the parameter configuration circuit in any one of the first aspects, the compatibility of the LRD driving board is improved, the same LED driving board can drive LEDs with different driving voltages, the types of the LED driving boards are reduced, and the production efficiency of the LED driving board is improved.

Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the invention as defined by the appended claims.

Claims (10)

1. A parameter configuration circuit, comprising: an enabling control module, a parameter configuration module, wherein,

The first end of the enabling control module is connected with the power supply, the second end of the enabling control module is connected with the enabling end of the parameter configuration module and is used for providing a plurality of enabling signals for the parameter configuration module, the enabling signals are determined by the working voltage of equipment to be driven, and the enabling signals are used for determining the resistance value of the parameter configuration module;

and the parameter configuration module is used for selecting the corresponding resistance value according to the enabling signal and configuring the driving parameter of the equipment to be driven, wherein the driving parameter of the equipment to be driven is the driving voltage.

2. The parameter configuration circuit of claim 1, wherein the enable control module comprises: and the first end of each enabling circuit is respectively connected with the power supply, the second end of each enabling circuit outputs different enabling signals, and the different enabling signals obtain different resistance values of the parameter configuration module.

3. The parameter configuration circuit of claim 2, wherein each of the enabling circuits comprises:

And the first end of the first resistor is connected with the power supply, and the second end of the first resistor is connected with the enabling end of the parameter configuration module and is used for keeping the enabling signal at a high level and limiting the output current of the enabling circuit.

4. A parameter configuration circuit according to claim 3, wherein the enabling circuit comprises: and the different enabling circuits are connected with the enabling ends of the parameter configuration module through different pins of the corresponding connector.

5. The parameter configuration circuit of claim 1, wherein the enable control module comprises:

and the control chip is provided with a plurality of output pins for respectively outputting a plurality of enable signals.

6. The parameter configuration circuit of claim 2, wherein the parameter configuration module comprises: a plurality of voltage configuration circuits, a power management circuit, a voltage division circuit, wherein,

The first end of the voltage configuration circuit is connected with the second end of the enabling circuit, the second end of the voltage configuration circuit configures the working voltage of the equipment to be driven, the third end of the voltage configuration circuit is connected with the voltage feedback end of the power management circuit, and the working voltage of the equipment to be driven is the maximum working voltage of the equipment to be driven;

The input end of the power management circuit is connected with an external power supply and is used for providing reference voltages for the voltage configuration circuit and the voltage division circuit;

And the first end of the voltage dividing circuit is connected with the second end of each voltage configuration circuit, the second end of the voltage dividing circuit is connected with the voltage feedback end of the power management circuit, and the third end of the voltage dividing circuit is grounded and is used for obtaining the configuration voltage of the equipment to be driven after connecting the voltage configuration circuits with different resistance values with the voltage dividing circuit in parallel according to the enabling signals.

7. The parameter configuration circuit of claim 6, wherein each of the voltage configuration circuits comprises: a second resistor, a third resistor, a fourth resistor, a first transistor, a second transistor, wherein,

A second resistor, a first end of which is connected with a second end of the enabling circuit, and a second end of which is connected with a control end of the first transistor;

A third resistor, the first end of which is connected with the voltage feedback end of the power management circuit, and the second end of which is connected with the first end of the second transistor;

a fourth resistor having a first terminal connected to the first terminal of the first transistor and a second terminal connected to the second terminal of the second transistor;

a first transistor having a first terminal connected to a control terminal of the second transistor and a second terminal connected to ground;

A second transistor having a second terminal for outputting a configuration voltage;

When the second resistor receives the enabling signal, the first transistor is conducted, the second transistor is conducted, and the voltage configuration circuit is connected with the voltage division circuit in parallel.

8. The parameter configuration circuit of claim 6, wherein the power management circuit comprises: and the input end of the voltage stabilizing chip is connected with an external power supply, and the voltage feedback end of the voltage stabilizing chip is connected with the second end of each voltage configuration circuit and is used for providing reference voltage.

9. The parameter configuration circuit of claim 6, wherein the voltage divider circuit comprises: a fifth resistor, a sixth resistor, wherein,

A fifth resistor, the first end of which is connected with the second end of each voltage configuration circuit, and the second end of which is connected with the voltage feedback end of the power management circuit;

The first end of the sixth resistor is connected with the second end of the fifth resistor, and the second end of the sixth resistor is grounded;

And after the voltage configuration circuit with the corresponding resistance value is selected according to the enabling signal, the voltage configuration circuit is connected with the fifth resistor in parallel, and then is connected with the sixth resistor in series for dividing voltage, and the configuration voltage of the equipment to be driven is determined according to the fifth resistor, the sixth resistor and the reference voltage.

10. An LED driver board, characterized in that the LED driver board comprises the parameter configuration circuit, the power circuit, the control circuit and the interface circuit according to any one of claims 1-9, wherein,

The input end of the power circuit is connected with the control circuit, the output end of the power circuit is connected with the LED, and the power circuit is used for converting the power supply voltage into the working voltage of equipment to be driven according to the voltage control instruction of the control circuit;

The input end of the control circuit is connected with the output end of the parameter configuration circuit and is used for receiving and processing a configuration voltage signal and outputting a voltage control instruction according to the configuration voltage signal;

And one end of the interface circuit is connected with the control circuit, and the other end of the interface circuit is connected with the peripheral circuit and is used for transmitting signals between the control circuit and the peripheral circuit.