Dimmable circuit for multiple LED lamps

Abstract

The utility model discloses a multi-LED lamp dimmable circuit, which relates to the technical field of multi-LED lamps, and comprises a power supply module used for supplying power; the brightness adjusting module is used for providing a pulse signal; the mode control module is used for controlling the lighting state and switching signal transmission paths of the driving control module and the temperature detection module; the temperature detection module is used for over-temperature detection and controlling a signal transmission path of the driving control module and the working state of the brightness adjusting module; the driving control module is used for improving the driving capability and driving the lighting states of the first LED module and the second LED module in an isolated manner; the first LED module is used for illumination work; and the second LED module is used for illumination work. The multi-LED lamp dimmable circuit can control the lighting state and the lighting brightness of the first LED module and the second LED module, and carries out lighting switching and power-off protection when the temperature is over-high, so that the lighting efficiency and the safety of the circuit are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-LED lights, in particular to a dimmable circuit for multi-LED lights. Background Technique

[0002] In recent years, LED lights have developed rapidly in the lighting field. They have the advantages of low working voltage, small power consumption, short response time, high luminous efficiency, impact resistance, long service life, pure light color, stable and reliable performance, and low cost. The dimmable circuit of LED lights in the prior art generally uses a 555 integrated chip for control to realize the brightness adjustment of LED lights. However, the driving ability of the driving signal output by the 555 integrated chip is limited, and it is impossible to dim and control multiple groups of LED lights at the same time. The number of LED lights that can be controlled is limited. Moreover, during the control of multiple groups of LED lights, if the temperature is too high, the service life of the LED lights will be shortened, and even the LED lights will be damaged, posing certain potential safety hazards. Therefore, it needs to be improved. Content of the Utility Model

[0003] The embodiment of the utility model provides a dimmable circuit for multi-LED lights to solve the problems raised in the above background technique.

[0004] To achieve the above object, the utility model provides the following technical solutions:

[0005] A dimmable circuit for multi-LED lights includes: a power supply module, a brightness adjustment module, a mode control module, a temperature detection module, a drive control module, a first LED module, and a second LED module;

[0006] The power supply module is connected to the brightness adjustment module, the temperature detection module, the mode control module, the drive control module, the first LED module, and the second LED module for power supply. It is used to access AC power and perform step-down, rectification, filtering, and voltage stabilization processing on the AC power, and supply power to the brightness adjustment module, the temperature detection module, the mode control module, the drive control module, the first LED module, and the second LED module;

[0007] The brightness adjustment module is connected to the temperature detection module and is used to output a first pulse signal and adjust the duty cycle of the first pulse signal. When receiving the first protection signal output by the temperature detection module, it stops outputting the first pulse signal;

[0008] The mode control module is connected to the temperature detection module and the drive control module and is used to provide a second control signal and switch the signal transmission path between the drive control module and the temperature detection module;

[0009] A temperature detection module, connected to the drive control module, is used to set an over-temperature threshold, detect the temperatures of the first LED module and the second LED module and output temperature signals. When the temperature signal is greater than the over-temperature threshold, it outputs a first protection signal and transmits the first protection signal to the drive control module. When receiving a second control signal, it switches the signal transmission path and transmits the first protection signal to the brightness adjustment module;

[0010] A drive control module, connected to the brightness adjustment module, the first LED module and the second LED module, is used to receive a first pulse signal and isolate and transmit the first pulse signal to the first LED module. When receiving a second control signal, it isolates and transmits the first pulse signal to the second LED module. When receiving the first protection signal, it stops isolating and transmitting the first pulse signal to the first LED module and isolates and transmits the first pulse signal to the second LED module;

[0011] The first LED module is used to receive the first pulse signal transmitted by the drive control module and perform lighting work;

[0012] The second LED module is used to receive the first pulse signal transmitted by the drive control module and perform lighting work.

[0013] As a further solution of the present utility model: The power supply module includes a power supply interface, a power supply processing device and a first capacitor; the brightness adjustment module includes a first resistor, a first diode, a second diode, a first potentiometer, a second capacitor, a first driver, a first switching tube, a second resistor and a third capacitor;

[0014] Preferably, the first end and the second end of the power supply interface are respectively connected to the first end and the second end of the power supply processing device. The third end of the power supply processing device is connected to the first end of the first capacitor, the eighth end of the first driver and the emitter of the first switching tube and is connected to the anode of the first diode, the cathode of the second diode and the seventh end of the first driver through the first resistor. The cathode of the first diode is connected to one end of the first potentiometer. The other end of the first potentiometer is connected to the anode of the second diode. The sliding end of the first potentiometer is connected to the second end and the sixth end of the first driver and is grounded through the second capacitor. The fifth end of the first driver is grounded through the third capacitor. The base of the first switching tube is grounded through the second resistor. The collector of the first switching tube is connected to the fourth end of the first driver. The first end of the first driver is grounded. The third end of the first driver is connected to the drive control module.

[0015] As a further solution of the present utility model: The drive control module includes a third resistor, a fourth resistor, a first analog switch, a second switching tube, a third diode, a first optocoupler, a second optocoupler, a sixth resistor, a first power supply and a seventh resistor;

[0016] Preferably, the third and eighth terminals of the first analog switch are both connected to the third terminal of the first driver through a third resistor. The fifth terminal of the first driver is connected to the collector of the second switching transistor and is connected to the first terminal of the first capacitor through a fourth resistor. The fourth terminal of the first driver is connected to the first terminal of the first optocoupler. The ninth terminal of the first driver is connected to the first terminal of the second optocoupler. The sixth terminal of the first analog switch is connected to the cathode of the third diode. The anode of the third diode is connected to the base of the second switching transistor and the temperature detection module. The emitter of the second switching transistor is grounded. The second terminals of the first optocoupler and the second optocoupler are both grounded. The third terminals of the first optocoupler and the second optocoupler are both connected to the first power supply. The fourth terminal of the first optocoupler is grounded through a sixth resistor. The fourth terminal of the second optocoupler is grounded through a seventh resistor.

[0017] As a further solution of the present invention: The mode control module includes a fifth resistor, a first push-button switch, and a fourth diode;

[0018] Preferably, the stationary terminal of the first push-button switch is connected to the first terminal of the first capacitor through a fifth resistor. The movable terminal of the first push-button switch is connected to the anode of the fourth diode and the temperature detection module. The cathode of the fourth diode is connected to the sixth terminal of the first analog switch.

[0019] As a further solution of the present invention: The first LED module includes a first LED module group and a first power transistor; the second LED module includes a second LED module group and a second power transistor;

[0020] Preferably, one end of the first LED module group and one end of the second LED module group are both connected to the first terminal of the first capacitor. The other end of the first LED module group is connected to the drain of the first power transistor. The other end of the second LED module group is connected to the drain of the second power transistor. The sources of the first power transistor and the second power transistor are both grounded. The gate of the first power transistor is connected to the fourth terminal of the first optocoupler. The gate of the second power transistor is connected to the fourth terminal of the second optocoupler.

[0021] As a further solution of the present invention: The temperature detection module includes a first thermistor, an eighth resistor, a first comparator, a first threshold device, a second analog switch, a second power supply, a ninth resistor, and a third switching transistor;

[0022] Preferably, the non-inverting input terminal of the first comparator is connected to one end of the eighth resistor and is connected to the first end of the first capacitor through the first thermistor. The other end of the eighth resistor is connected to the second end of the first capacitor and the ground terminal. The inverting input terminal of the first comparator is connected to the first threshold device. The output terminal of the first comparator is connected to the third terminal and the eighth terminal of the second analog switch. The fifth terminal of the second analog switch is connected to the collector of the third switching transistor and is connected to the second power supply through the ninth resistor. The emitter of the third switching transistor is grounded. The base of the third switching transistor is connected to the sixth terminal of the second analog switch and the moving terminal of the first push-button switch. The ninth terminal of the second analog switch is connected to the base of the first switching transistor. The fourth terminal of the second analog switch is connected to the base of the second switching transistor and the anode of the third diode.

[0023] Compared with the prior art, the beneficial effects of the present utility model are as follows: The dimmable multi-LED lamp circuit of the present utility model controls the lighting states of the first LED module and the second LED module through the cooperation of the mode control module and the drive control module. When only the first LED module is used for lighting, the brightness adjustment module adjusts the lighting brightness of the first LED module through the drive control module. When the temperature detection module detects that the temperature of the first LED module exceeds the set over-temperature threshold, the second LED module will be switched to work for lighting to reduce the working temperature, and the brightness adjustment module will adjust the brightness through the drive control module. When the first LED module and the second LED module work together, the brightness adjustment module will simultaneously adjust the brightness of the first LED module and the second LED module through the drive control module, and after the temperatures of the first LED module and the second LED module exceed the over-temperature threshold, the work of the brightness adjustment module will be stopped for circuit protection, improving the safety of the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic block diagram of the principle of a dimmable multi-LED lamp circuit provided by an embodiment of the present utility model.

[0026] Figure 2 It is a circuit diagram of a dimmable multi-LED lamp circuit provided by an embodiment of the present utility model.

[0027] Figure 3 It is a connection circuit diagram of the temperature detection module provided by an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] In one embodiment, please refer to Figure 1 , a dimmable multi-LED lamp circuit, comprising: a power supply module 1, a brightness adjustment module 2, a mode control module 3, a temperature detection module 4, a drive control module 5, a first LED module 6, and a second LED module 7;

[0030] Specifically, the power supply module 1 is electrically connected to the brightness adjustment module 2, the temperature detection module 4, the mode control module 3, the drive control module 5, the first LED module 6, and the second LED module 7, and is used for accessing AC power, stepping down, rectifying, filtering, and stabilizing the AC power, and supplying power to the brightness adjustment module 2, the temperature detection module 4, the mode control module 3, the drive control module 5, the first LED module 6, and the second LED module 7;

[0031] The brightness adjustment module 2 is connected to the temperature detection module 4, and is used for outputting a first pulse signal and adjusting the duty cycle of the first pulse signal, and stopping outputting the first pulse signal when receiving the first protection signal output by the temperature detection module 4;

[0032] The mode control module 3 is connected to the temperature detection module 4 and the drive control module 5, and is used for providing a second control signal and switching the signal transmission path between the drive control module 5 and the temperature detection module 4;

[0033] The temperature detection module 4 is connected to the drive control module 5, and is used for setting an over-temperature threshold, detecting the temperature of the first LED module 6 and the second LED module 7 and outputting a temperature signal, outputting a first protection signal and transmitting the first protection signal to the drive control module 5 when the temperature signal is greater than the over-temperature threshold, and switching the signal transmission path and transmitting the first protection signal to the brightness adjustment module 2 when receiving the second control signal;

[0034] The drive control module 5 is connected to the brightness adjustment module 2, the first LED module 6, and the second LED module 7, and is used for receiving the first pulse signal and isolating and transmitting the first pulse signal to the first LED module 6, isolating and transmitting the first pulse signal to the second LED module 7 when receiving the second control signal, and stopping isolating and transmitting the first pulse signal to the first LED module 6 and isolating and transmitting the first pulse signal to the second LED module 7 when receiving the first protection signal;

[0035] The first LED module 6 is configured to receive the first pulse signal transmitted by the drive control module 5 and perform lighting work;

[0036] The second LED module 7 is configured to receive the first pulse signal transmitted by the drive control module 5 and perform lighting work.

[0037] In a specific embodiment, the power supply module 1 may adopt a power supply circuit composed of a power supply interface, a power supply processing device, and a capacitor, which can access AC power and perform step-down, rectification filtering, and voltage stabilization filtering on the AC power; the brightness adjustment module 2 may adopt a brightness adjustment circuit composed of a 555 chip, a diode, a capacitor, a triode, etc., which can provide a pulse signal and adjust the duty cycle of the pulse signal; the mode control module 3 may adopt a mode control circuit composed of a resistor, a key switch, and a diode, which can change the working states of the drive control module 5 and the temperature detection module 4; the temperature detection module 4 may adopt a temperature detection circuit composed of a thermistor, a comparator, an analog switch, a triode, etc., which can set an over-temperature threshold and judge the magnitude relationship between the sampled temperature signal and the over-temperature threshold, and transmit the output signal to the drive control module 5. When controlled by the mode control module 3, the output signal is transmitted to the brightness adjustment module 2; the drive control module 5 may adopt a drive control circuit composed of an analog switch, a resistor, an optocoupler, etc., which can control the transmission path of the pulse signal and perform multi-channel isolation transmission processing on the pulse signal to improve the drive ability; the first LED module 6 may adopt a first LED circuit composed of a power tube and an LED module to perform lighting work; the second LED module 7 may adopt a second LED circuit composed of a power tube and an LED module to perform lighting work.

[0038] In another embodiment, please refer to Figure 1 , Figure 2 and Figure 3 , the power supply module 1 includes a power supply interface, a power supply processing device, and a first capacitor C1; the brightness adjustment module 2 includes a first resistor R1, a first diode D1, a second diode D2, a first potentiometer RP1, a second capacitor C2, a first driver IC1, a first switching tube V1, a second resistor R2, and a third capacitor C3;

[0039] Specifically, the first end and the second end of the power interface are respectively connected to the first end and the second end of the power processing device. The third end of the power processing device is connected to the first end of the first capacitor C1, the eighth end of the first driver IC1, and the emitter of the first switching transistor V1, and is connected to the anode of the first diode D1, the cathode of the second diode D2, and the seventh end of the first driver IC1 through the first resistor R1. The cathode of the first diode D1 is connected to one end of the first potentiometer RP1. The other end of the first potentiometer RP1 is connected to the anode of the second diode D2. The sliding contact end of the first potentiometer RP1 is connected to the second end and the sixth end of the first driver IC1 and is grounded through the second capacitor C2. The fifth end of the first driver IC1 is grounded through the third capacitor C3. The base of the first switching transistor V1 is grounded through the second resistor R2. The collector of the first switching transistor V1 is connected to the fourth end of the first driver IC1. The first end of the first driver IC1 is grounded. The third end of the first driver IC1 is connected to the drive control module 5.

[0040] In a specific embodiment, the above-mentioned power processing device may be composed of a transformer, a rectifier, a capacitor, and a voltage regulator to perform step-down, rectification filtering, and voltage regulation operations; the above-mentioned first driver IC1 may be selected as an NE555 chip, which, in cooperation with the first resistor R1, the first diode D1, the second diode D2, the first potentiometer RP1, the second capacitor C2, the first switching transistor V1, the second resistor R2, and the third capacitor C3, provides a pulse signal, where the first potentiometer RP1 adjusts the duty cycle of the pulse signal, and the first switching transistor V1 may be selected as a PNP type triode.

[0041] Further, the drive control module 5 includes a third resistor R3, a fourth resistor R4, a first analog switch IC2, a second switching diode D2, a third diode D3, a first optocoupler J1, a second optocoupler J2, a sixth resistor R6, a first power supply VCC1, and a seventh resistor R7;

[0042] Specifically, the third end and the eighth end of the first analog switch IC2 are both connected to the third end of the first driver IC1 through the third resistor R3. The fifth end of the first driver IC1 is connected to the collector of the second switching diode D2 and is connected to the first end of the first capacitor C1 through the fourth resistor R4. The fourth end of the first driver IC1 is connected to the first end of the first optocoupler J1. The ninth end of the first driver IC1 is connected to the first end of the second optocoupler J2. The sixth end of the first analog switch IC2 is connected to the cathode of the third diode D3. The anode of the third diode D3 is connected to the base of the second switching diode D2 and the temperature detection module 4. The emitter of the second switching diode D2 is grounded. The second end of the first optocoupler J1 and the second end of the second optocoupler J2 are both grounded. The third end of the first optocoupler J1 and the third end of the second optocoupler J2 are both connected to the first power supply VCC1. The fourth end of the first optocoupler J1 is grounded through the sixth resistor R6. The fourth end of the second optocoupler J2 is grounded through the seventh resistor R7.

[0043] In a specific embodiment, the above-mentioned first analog switch IC2 can select the CD4066 chip; the above-mentioned first optocoupler J1 and second optocoupler J2 can both select the PC817 optoelectronic coupler; the above-mentioned second switching tube D2 can select an NPN-type triode.

[0044] Furthermore, the mode control module 3 includes a fifth resistor R5, a first push-button switch S1, and a fourth diode D4;

[0045] Specifically, the static terminal of the first push-button switch S1 is connected to the first end of a first capacitor C1 through the fifth resistor R5, the moving terminal of the first push-button switch S1 is connected to the anode of the fourth diode D4 and the temperature detection module 4, and the cathode of the fourth diode D4 is connected to the sixth terminal of the first analog switch IC2.

[0046] In a specific embodiment, the above-mentioned first push-button switch S1 is a normally open switch. When it is turned on, it provides a high level to the sixth terminal of the first analog switch IC2 through the fourth diode D4.

[0047] Furthermore, the first LED module 6 includes a first LED module group and a first power transistor Q1; the second LED module 7 includes a second LED module group and a second power transistor Q2;

[0048] Specifically, one end of the first LED module group and one end of the second LED module group are both connected to the first end of the first capacitor C1. The other end of the first LED module group is connected to the drain of the first power transistor Q1, the other end of the second LED module group is connected to the drain of the second power transistor Q2. The sources of the first power transistor Q1 and the second power transistor Q2 are both grounded. The gate of the first power transistor Q1 is connected to the fourth terminal of the first optocoupler J1, and the gate of the second power transistor Q2 is connected to the fourth terminal of the second optocoupler J2.

[0049] In a specific embodiment, the above-mentioned first power transistor Q1 and second power transistor Q2 can both select N-channel field effect transistors.

[0050] Furthermore, the temperature detection module 4 includes a first thermistor RT1, an eighth resistor R8, a first comparator A1, a first threshold device, a second analog switch IC3, a second power supply VCC2, a ninth resistor R9, and a third switching tube V3;

[0051] Specifically, the non-inverting input terminal of the first comparator A1 is connected to one end of the eighth resistor R8 and is connected to the first end of the first capacitor C1 through the first thermistor RT1. The other end of the eighth resistor R8 is connected to the second end of the first capacitor C1 and the ground terminal. The inverting input terminal of the first comparator A1 is connected to the first threshold device. The output terminal of the first comparator A1 is connected to the third terminal and the eighth terminal of the second analog switch IC3. The fifth terminal of the second analog switch IC3 is connected to the collector of the third switching transistor V3 and is connected to the second power supply VCC2 through the ninth resistor R9. The emitter of the third switching transistor V3 is grounded. The base of the third switching transistor V3 is connected to the sixth terminal of the second analog switch IC3 and the moving terminal of the first push-button switch S1. The ninth terminal of the second analog switch IC3 is connected to the base of the first switching transistor V1. The fourth terminal of the second analog switch IC3 is connected to the base of the second switching diode D2 and the anode of the third diode D3.

[0052] In a specific embodiment, the above-mentioned first thermistor RT1 can be a negative temperature coefficient thermistor; the above-mentioned first comparator A1 can be an LM358 comparator; the above-mentioned second analog switch IC3 can be a CD4066 chip; the above-mentioned third switching transistor V3 can be an NPN type triode; the above-mentioned first threshold device can be composed of a reference power supply and a resistor to provide an over-temperature threshold.

[0053] In a dimmable circuit for multiple LEDs in this embodiment, AC power is connected through a power interface, and the power processing device steps down, rectifies, filters, and stabilizes the filtered AC power. Initially, the second switching transistor D2 conducts because the second resistor R2 is grounded. The first driver IC1, in cooperation with the first resistor R1, the first diode D1, the second diode D2, the first potentiometer RP1, the second capacitor C2, the first switching transistor V1, the second resistor R2, and the third capacitor C3, provides a pulse signal. The fifth terminal of the first analog switch IC2 is at a high level, causing the third and fourth terminals of the first analog switch IC2 to conduct, enabling the pulse signal to be transmitted through the first analog switch IC2 to the first optocoupler J1. The first optocoupler J1 isolates and transmits the signal and controls the conduction of the first power transistor Q1 to control the lighting operation of the first LED module. Since the first potentiometer RP1 can adjust the duty cycle of the pulse signal, it can adjust the conduction degree of the first power transistor Q1 and thus adjust the lighting brightness of the first LED module. At the same time, the first thermistor RT1 and the eighth resistor R8 detect the temperature of the first LED module. When the detected temperature is higher than the temperature threshold set by the first threshold device, the first comparator A1 outputs a high level. At this time, the fifth terminal of the second analog switch IC3 is at a high level, and the third and fourth terminals of the second analog switch IC3 conduct, enabling the first comparator A1 to control the conduction of the second switching transistor D2 and control the conduction of the eighth and ninth terminals of the first analog switch IC2, causing the pulse signal to be transmitted to the second optocoupler J2, and then driving the conduction of the second power transistor Q2 to control the lighting operation of the second LED module. When the first push-button switch S1 is pressed, the third switching transistor V3 conducts, causing the eighth and ninth terminals of the second analog switch IC3 to conduct, the third and fourth terminals of the first analog switch IC2 to conduct, and the eighth and ninth terminals of the first analog switch IC2 to conduct, and then simultaneously driving the lighting operations of the first LED module and the second LED module. If the detected temperature exceeds the over-temperature threshold at this time, the first comparator A1 will trigger the first switching transistor V1 to cut off through the second analog switch IC3, and the first driver IC1 will stop working, stopping the lighting operation.

[0054] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0055] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-LED lamp dimmable circuit, characterized in that: The multi-LED lamp dimmable circuit comprises: a power supply module, a brightness adjustment module, a mode control module, a temperature detection module, a drive control module, a first LED module and a second LED module; The power supply module is connected to the brightness adjustment module, the temperature detection module, the mode control module, the drive control module, the first LED module and the second LED module for power supply, and is used to receive the AC power and perform voltage reduction, rectification, filtering and voltage stabilization on the AC power, and to supply power to the brightness adjustment module, the temperature detection module, the mode control module, the drive control module, the first LED module and the second LED module; The brightness adjustment module is connected to the temperature detection module, and is used to output a first pulse signal and adjust the duty cycle of the first pulse signal, and stop outputting the first pulse signal when receiving a first protection signal output by the temperature detection module; The mode control module is connected to the temperature detection module and the drive control module, and is used to provide a second control signal and switch the signal transmission path between the drive control module and the temperature detection module; The temperature detection module is connected to the drive control module and is used to set an over-temperature threshold, perform temperature detection on the first LED module and the second LED module and output a temperature signal, and when the temperature signal is greater than the over-temperature threshold, output a first protection signal and transmit the first protection signal to the drive control module, and when receiving the second control signal, switch the signal transmission path and transmit the first protection signal to the brightness adjustment module; The drive control module is connected to the brightness adjustment module, the first LED module and the second LED module, and is used to receive the first pulse signal and transmit the first pulse signal in isolation to the first LED module, and when receiving the second control signal, transmit the first pulse signal in isolation to the second LED module, and when receiving the first protection signal, stop transmitting the first pulse signal in isolation to the first LED module and transmit the first pulse signal in isolation to the second LED module; The first LED module is used to receive the first pulse signal transmitted by the driving control module and perform lighting work; The second LED module is used to receive the first pulse signal transmitted by the driving control module and perform lighting work.

2. A multi-LED lamp dimmable circuit according to claim 1, characterized in that: The power module includes a power interface, a power processing device and a first capacitor; the brightness adjustment module includes a first resistor, a first diode, a second diode, a first potentiometer, a second capacitor, a first driver, a first switch tube, a second resistor and a third capacitor; The first end and the second end of the power interface are respectively connected to the first end and the second end of the power processing device, the third end of the power processing device is connected to the first end of the first capacitor, the eighth end of the first driver and the emitter of the first switch tube and connected to the anode of the first diode, the cathode of the second diode and the seventh end of the first driver through the first resistor, the cathode of the first diode is connected to one end of the first potentiometer, the other end of the first potentiometer is connected to the anode of the second diode, the slider end of the first potentiometer is connected to the second end and the sixth end of the first driver and is grounded through the second capacitor, the fifth end of the first driver is grounded through the third capacitor, the base of the first switch tube is grounded through the second resistor, the collector of the first switch tube is connected to the fourth end of the first driver, the first end of the first driver is grounded, and the third end of the first driver is connected to the drive control module.

3. A multi-LED lamp dimmable circuit according to claim 2, characterized in that: The drive control module includes a third resistor, a fourth resistor, a first analog switch, a second switch tube, a third diode, a first optocoupler, a second optocoupler, a sixth resistor, a first power supply and a seventh resistor; The third end and the eighth end of the first analog switch are both connected to the third end of the first driver through the third resistor, the fifth end of the first driver is connected to the collector of the second switch tube and connected to the first end of the first capacitor through the fourth resistor, the fourth end of the first driver is connected to the first end of the first optocoupler, the ninth end of the first driver is connected to the first end of the second optocoupler, the sixth end of the first analog switch is connected to the cathode of the third diode, the anode of the third diode is connected to the base of the second switch tube and the temperature detection module, the emitter of the second switch tube is grounded, the second end of the first optocoupler and the second end of the second optocoupler are both grounded, the third end of the first optocoupler and the third end of the second optocoupler are both connected to the first power supply, the fourth end of the first optocoupler is grounded through the sixth resistor, and the fourth end of the second optocoupler is grounded through the seventh resistor.

4. A multi-LED lamp dimmable circuit according to claim 3, characterized in that: The mode control module includes a fifth resistor, a first key switch and a fourth diode; The static end of the first key switch is connected to the first end of the first capacitor through the fifth resistor, the dynamic end of the first key switch is connected to the anode of the fourth diode and the temperature detection module, and the cathode of the fourth diode is connected to the sixth end of the first analog switch.

5. The multi-LED lamp dimmable circuit according to claim 4, characterized in that: The first LED module includes a first LED module and a first power tube; the second LED module includes a second LED module and a second power tube; One end of the first LED module and one end of the second LED module are connected to the first end of the first capacitor, the other end of the first LED module is connected to the drain of the first power tube, the other end of the second LED module is connected to the drain of the second power tube, the source of the first power tube and the source of the second power tube are both grounded, the gate of the first power tube is connected to the fourth end of the first optocoupler, and the gate of the second power tube is connected to the fourth end of the second optocoupler.

6. The multi-LED lamp dimmable circuit according to claim 5, characterized in that: The temperature detection module includes a first thermistor, an eighth resistor, a first comparator, a first threshold device, a second analog switch, a second power supply, a ninth resistor and a third switch tube; The in-phase end of the first comparator is connected to one end of the eighth resistor and to the first end of the first capacitor through the first thermistor, the other end of the eighth resistor is connected to the second end of the first capacitor and the ground, the inverting end of the first comparator is connected to the first threshold device, the output end of the first comparator is connected to the third end and the eighth end of the second analog switch, the fifth end of the second analog switch is connected to the collector of the third switch tube and to the second power supply through the ninth resistor, the emitter of the third switch tube is grounded, the base of the third switch tube is connected to the sixth end of the second analog switch and the moving end of the first key switch, the ninth end of the second analog switch is connected to the base of the first switch tube, and the fourth end of the second analog switch is connected to the base of the second switch tube and the anode of the third diode.

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