Silicon controlled rectifier LED dimming control circuit

Abstract

The invention discloses a silicon-controlled LED dimming control circuit, which relates to the technical field of silicon-controlled LEDs and comprises a micro-control module, when a first LED module and a second LED module are controlled to be connected in series or the first LED module is controlled to independently illuminate, a first power module provides constant-current voltage stabilization, and when the first LED module, the second LED module and a third LED module are controlled to be connected in series for illumination, a second power module provides constant-current voltage stabilization. When the first LED module and the third LED module supply power in parallel, the second mode module controls the first power module to carry out boosting superposition processing, when the first LED module and the third LED module supply power in parallel, the first analog switch controls the second power module and the first power module to carry out electric energy compensation and current rising processing, and the second mode module can control the second power module to carry out dimming control on the LED modules. The silicon controlled rectifier LED dimming control circuit can meet the driving electric energy required by different connection states of the LED module, the lighting efficiency is improved, and the dimming precision is improved.

Description

Technical Field

[0001] The invention relates to the technical field of thyristor LEDs, in particular to a thyristor LED dimming control circuit. Background Art

[0002] At present, LED has become the main lighting source in indoor lighting, which can improve the constant current and voltage stabilization drive control and intelligent dimming control of LED. In the existing technology, thyristor LED generally adopts a thyristor LED dimming control circuit composed of relevant constant current and voltage stabilization drive devices, thyristors, field effect tubes, etc. to provide stable and unchanging driving power. It is unable to automatically select the matching driving power according to the connection status of the thyristor LED, resulting in the thyristor LED changing the connection mode, that is, multiple groups of thyristor LEDs are connected in series or in parallel for lighting, and cannot provide the most appropriate driving signal, resulting in a decrease in the driving efficiency of the thyristor LED, so it needs to be improved. Summary of the Invention

[0003] The embodiment of the present invention provides a thyristor LED dimming control circuit to solve the problems raised in the above background technology.

[0004] According to an embodiment of the present invention, a thyristor LED dimming control circuit is provided, comprising: a power module for receiving direct current power; a first power module, connected to the power module, configured to perform power regulation and voltage boosting on the DC power and output a first electric energy, and to perform self-superposition processing on the processed electric energy and output a second electric energy; a second power module, connected to the power module, configured to boost the DC power and output a third electric energy, and to reduce the DC power and output a fourth electric energy; a first mode module connected to the second power module, the first power module, the first LED module, the second LED module, and the third LED module, configured to transmit the third electrical energy to the first power module and perform electrical energy compensation and current boosting processing on the first electrical energy, transmit the fourth electrical energy to the first LED module, the second LED module, and the third LED module, and adjust the lighting brightness of the first LED module, the second LED module, and the third LED module; The second mode module is connected to the first power module and is used to control the first power module to perform power self-addition when the micro-control module does not change the connection state of the first LED module, the second LED module and the third LED module; A first LED module is connected to the first power module and is used for lighting; A second LED module is connected to the first LED module and is used for series lighting operation with the first LED module; a third LED module connected to the first LED module and the second LED module, for performing a series lighting operation with the first LED module and the second LED module, and performing a parallel lighting operation with the first LED module; The microcontroller module is connected to the first mode module, the second mode module, the first power tube module, the second power tube module, the first LED module, the second LED module and the third LED module, and is used to control the first power module to perform power adjustment when the first LED module is controlled to perform individual lighting or the first LED module and the second LED module are connected in series for lighting; when the connection status of the first LED module, the second LED module and the third LED module is not changed, the microcontroller module is controlled to perform voltage boost regulation; when the first LED module and the third LED module are controlled to perform parallel lighting, the microcontroller module is controlled to perform power compensation and current boost processing; when the lighting brightness of the first LED module, the second LED module or the third LED module needs to be adjusted, the microcontroller module is controlled to transmit the fourth power and stop the power compensation and current boost operations of the first mode module.

[0005] As a further embodiment of the present invention, the power module includes a power interface; the first power module includes a first inductor, a first transformer, a first thyristor, a second inductor, a first power transistor, a first diode, a first capacitor, a second diode, a second capacitor, a seventh thyristor, a third diode, and a third capacitor; and the microcontroller module includes a first controller; Preferably, the first end of the power interface is connected to the first end of the primary side of the first transformer and is connected to one end of the second inductor and one end of the first thyristor through the first inductor, the other end of the first thyristor is connected to the second end of the primary side of the first transformer, the other end of the second inductor is connected to the drain of the first power tube and the anode of the first diode, the cathode of the first diode is connected to one end of the first capacitor, the anode of the second diode and the first end of the secondary side of the first transformer, the second end of the secondary side of the first transformer is connected to the cathode of the second diode and the anode of the third diode through the second capacitor, the cathode of the third diode is connected to the other end of the first capacitor, the first end of the seventh thyristor, the source of the first power tube, the second end of the power interface and the ground through the third capacitor, the gate of the first power tube is connected to the IO1 end of the first controller, the control end of the first thyristor is connected to the second mode module, and the control end of the seventh thyristor is connected to the IO4 end of the first controller.

[0006] As a further solution of the present invention: the second power module includes a third inductor, a fourth capacitor, a fourth inductor, a second power tube, a fifth capacitor and a third power tube; Preferably, one end of the fourth capacitor is connected to the drain of the second power tube and is connected to the first end of the power interface through the third inductor, the source of the second power tube is connected to the drain of the third power tube, one end of the fifth capacitor and the first mode module, the source of the third power tube is connected to the other end of the fourth capacitor and is connected to the other end of the fifth capacitor and the second end of the power interface through the fourth inductor, and the gate of the second power tube and the gate of the third power tube are respectively connected to the IO2 end and IO3 end of the first controller.

[0007] As a further solution of the present invention: the first LED module includes a first LED group and a second thyristor; Preferably, the first end of the first LED main is connected to the cathode of the third diode, the second end of the first LED group is connected to the anode of the second thyristor, the cathode of the second thyristor is connected to the first mode module, and the control end of the second thyristor is connected to the IO5 end of the first controller and the cathode of the third diode.

[0008] As a further solution of the present invention: the second LED module includes a second LED group, a fourth diode and a third thyristor; the third LED module includes a fourth thyristor, a third LED group and a fifth diode; Preferably, the first end of the second LED group is connected to the second end of the first LED group, the second end of the second LED group is connected to the anode of the fourth diode, the cathode of the fourth diode is connected to the cathode of the fourth thyristor, one end of the third thyristor and the first end of the third LED group, the second end of the third LED group is connected to the anode of the fifth diode, the cathode of the fifth diode is connected to the cathode of the second thyristor, the second end of the seventh thyristor and the other end of the third thyristor, the anode of the fourth thyristor is connected to the cathode of the third diode, and the control end of the fourth thyristor and the control end of the third thyristor are respectively connected to the IO7 end and IO6 end of the first controller.

[0009] As a further solution of the present invention: the first mode module includes a fifth thyristor, a sixth thyristor, a sixth diode and a sixth capacitor; Preferably, one end of the fifth thyristor is connected to one end of the sixth thyristor and the drain of the third power tube, the other end of the fifth thyristor is connected to the anode of the sixth diode and grounded through the sixth capacitor, the other end of the sixth thyristor is connected to the cathode of the fifth diode, the cathode of the sixth diode is connected to the anode of the third diode, and the control end of the fifth thyristor and the control end of the sixth thyristor are respectively connected to the IO7 end and IO8 end of the first controller.

[0010] As a further solution of the present invention: the second mode module includes a first logic chip, a second logic chip and a first inverter; Preferably, the A end and the B end of the first logic chip are respectively connected to the IO5 end and the IO6 end of the first controller, the input end of the first inverter is connected to the IO7 end of the first controller, the A end and the B end of the second logic chip are respectively connected to the Y end of the first logic chip and the output end of the first inverter, and the Y end of the second logic chip is connected to the control end of the first thyristor.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the thyristor LED dimming control circuit of the present invention can control the connection status of the first LED module, the second LED module and the third LED module by the microcontroller module to realize parallel lighting or series lighting operation; when the first LED module and the second LED module are connected in series or the first LED module is illuminated alone, the first power module provides constant current and voltage stabilization; when the first LED module, the second LED module and the third LED module are illuminated in series, the second mode module controls the first power module to perform boost and superposition processing; when the first LED module and the third LED module are powered in parallel, the first analog switch controls the second power module to perform power compensation and current boost processing with the first power module, so as to meet the driving power required for different connection states of the LED modules and improve lighting efficiency; and the second mode module can control the second power module to perform dimming control on the first LED module, the second LED module and the third LED module, thereby improving dimming accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 A schematic block diagram of a thyristor LED dimming control circuit provided by an embodiment of the present invention.

[0014] Figure 2 A circuit diagram of a thyristor LED dimming control circuit provided by an embodiment of the present invention.

[0015] Figure 3 This is a circuit diagram of a first mode module provided by an embodiment of the present invention.

[0016] Figure 4 This is a circuit diagram of the second mode module provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] In one embodiment, see Figure 1 , a thyristor LED dimming control circuit, comprising: a power module 1 for receiving direct current power; The first power module 2 is connected to the power module 1 and is used to perform power regulation and voltage boosting on the DC power and output the first power, and to perform self-superposition processing on the processed power and output the second power; The second power module 3 is connected to the power module 1 and is used to boost the DC power and output the third power, and to step down the DC power and output the fourth power; The first mode module 4 is connected to the second power module 3, the first power module 2, the first LED module 6, the second LED module 7, and the third LED module 8, and is used to transmit the third electric energy to the first power module 2 and perform electric energy compensation and current boosting processing on the first electric energy, and transmit the fourth electric energy to the first LED module 6, the second LED module 7, and the third LED module 8 and adjust the lighting brightness of the first LED module 6, the second LED module 7, and the third LED module 8; The second mode module 5 is connected to the first power module 2 and is used to control the first power module 2 to perform power self-addition when the micro-control module 9 does not change the connection status of the first LED module 6, the second LED module 7 and the third LED module 8; A first LED module 6 is connected to the first power module 2 and is used for lighting; The second LED module 7 is connected to the first LED module 6 and is used for series lighting operation with the first LED module 6; A third LED module 8 is connected to the first LED module 6 and the second LED module 7, and is used to perform series lighting operation with the first LED module 6 and the second LED module 7, and perform parallel lighting operation with the first LED module 6; The microcontroller module 9 is connected to the first mode module 4, the second mode module 5, the first power tube Q1 module, the second power tube Q2 module, the first LED module 6, the second LED module 7 and the third LED module 8, and is used to control the first power module 2 to perform power adjustment when controlling the first LED module 6 to perform individual lighting or the first LED module 6 and the second LED module 7 to perform series lighting. When the connection status of the first LED module 6, the second LED module 7 and the third LED module 8 is not changed, the microcontroller module 9 controls the first power module 2 to perform voltage boost regulation. When controlling the first LED module 6 and the third LED module 8 to perform parallel lighting, the microcontroller module 9 controls the first mode module 4 to perform power compensation and current boost processing. When it is necessary to adjust the lighting brightness of the first LED module 6, the second LED module 7 or the third LED module 8, the microcontroller module 9 controls the first mode module 4 to transmit the fourth power and stop the power compensation and current boost operations of the first mode module 4.

[0019] In a specific embodiment, the power supply module 1 can adopt a power supply circuit composed of a power supply interface to access DC power; the first power module 2 can adopt a first power circuit composed of an inductor, a comparator, a field effect transistor, a diode, etc., which can perform power regulation and self-superposition and voltage boosting of electric energy; the second power module 3 can adopt a second power circuit composed of an inductor, a diode and a field effect transistor, which can perform voltage boost and voltage reduction regulation, realize power compensation and current boosting of the first power module 2, and realize dimming control of the first LED module 6, the second LED module 7 and the third LED module 8; the first mode module 4 can adopt a first mode circuit composed of a thyristor, a capacitor and a diode, which can control the power transmission path of the second power module 3, and then control the working state of the second power module 3 and the first power module 2, the first LED module 6, the second LED module 7 and the third LED module 8; The second mode module 5 can adopt a second mode circuit composed of a logic chip and an inverter, and control the self-superposition operation of the first mode module 4 according to the connection status of the first LED module 6, the second LED module 7 and the third LED module 8; the above-mentioned first LED module 6 can adopt a first LED module 6 composed of an LED group and a thyristor to perform lighting control and power transmission control; the above-mentioned second LED module 7 can adopt a second LED circuit composed of a diode, an LED group and a thyristor to perform lighting work and power transmission control; the above-mentioned third LED module 8 can adopt a third LED circuit composed of a diode, an LED group and a thyristor to perform lighting work and power transmission control; the above-mentioned microcontroller module 9 can adopt a microcontroller circuit composed of a single-chip microcomputer, which integrates many components such as an arithmetic unit, a controller, a memory, and an input and output device to realize functions such as signal processing, data storage, module control, and timing control.

[0020] In another embodiment, see Figure 1 、 Figure 2、 Figure 3 and Figure 4 The power module 1 includes a power interface; the first power module 2 includes a first inductor L1, a first transformer B1, a first thyristor S1, a second inductor L2, a first power tube Q1, a first diode D1, a first capacitor C1, a second diode D2, a second capacitor C2, a seventh thyristor S7, a third diode D3 and a third capacitor C3; the micro control module 9 includes a first controller U1; Specifically, the first end of the power interface is connected to the first end of the primary side of the first transformer B1 and is connected to one end of the second inductor L2 and one end of the first thyristor S1 through the first inductor L1. The other end of the first thyristor S1 is connected to the second end of the primary side of the first transformer B1. The other end of the second inductor L2 is connected to the drain of the first power tube Q1 and the anode of the first diode D1. The cathode of the first diode D1 is connected to one end of the first capacitor C1, the anode of the second diode D2, and the first end of the secondary side of the first transformer B1. The second end of the secondary side of the first transformer B1 is connected to the cathode of the second diode D2 and the anode of the third diode D3 through the second capacitor C2. The cathode of the third diode D3 is connected to the other end of the first capacitor C1, the first end of the seventh thyristor S7, the source of the first power tube Q1, the second end of the power interface, and the ground through the third capacitor C3. The gate of the first power tube Q1 is connected to the IO1 terminal of the first controller U1. The control end of the first thyristor S1 is connected to the second mode module 5. The control end of the seventh thyristor S7 is connected to the IO4 terminal of the first controller U1.

[0021] In a specific embodiment, the above-mentioned first power tube Q1 can be an N-channel field effect tube, which cooperates with the first inductor L1, the second inductor L2, the first diode D1, the second diode D2, the third diode D3 and the third capacitor C3 to perform power regulation processing. The first thyristor S1 can be a bidirectional thyristor, which cooperates with the first transformer B1 and the second capacitor C2 to perform self-superposition boost processing; the above-mentioned first inductor L1 and the second inductor L2 are the excitation inductance and leakage inductance of the first transformer B1 respectively; the above-mentioned first controller U1 can be an STM32 single-chip microcomputer; the above-mentioned seventh thyristor S7 can be a bidirectional thyristor.

[0022] Furthermore, the second power module 3 includes a third inductor L3, a fourth capacitor C4, a fourth inductor L4, a second power tube Q2, a fifth capacitor C5 and a third power tube Q3; Specifically, one end of the fourth capacitor C4 is connected to the drain of the second power tube Q2 and is connected to the first end of the power interface through the third inductor L3. The source of the second power tube Q2 is connected to the drain of the third power tube Q3, one end of the fifth capacitor C5 and the first mode module 4. The source of the third power tube Q3 is connected to the other end of the fourth capacitor C4 and is connected to the other end of the fifth capacitor C5 and the second end of the power interface through the fourth inductor L4. The gate of the second power tube Q2 and the gate of the third power tube Q3 are respectively connected to the IO2 terminal and IO3 terminal of the first controller U1.

[0023] In a specific embodiment, both the second power tube Q2 and the third power tube Q3 can be N-channel field effect tubes.

[0024] Furthermore, the first LED module 6 includes a first LED group and a second thyristor S2; Specifically, the first end of the first LED main is connected to the cathode of the third diode D3, the second end of the first LED group is connected to the anode of the second thyristor S2, the cathode of the second thyristor S2 is connected to the first mode module 4, and the control end of the second thyristor S2 is connected to the IO5 end of the first controller U1 and the cathode of the third diode D3.

[0025] In a specific embodiment, the second thyristor S2 can be a unidirectional thyristor.

[0026] Furthermore, the second LED module 7 includes a second LED group, a fourth diode D4 and a third thyristor S3; the third LED module 8 includes a fourth thyristor S4, a third LED group and a fifth diode D5; Specifically, the first end of the second LED group is connected to the second end of the first LED group, the second end of the second LED group is connected to the anode of the fourth diode D4, the cathode of the fourth diode D4 is connected to the cathode of the fourth thyristor S4, one end of the third thyristor S3 and the first end of the third LED group, the second end of the third LED group is connected to the anode of the fifth diode D5, the cathode of the fifth diode D5 is connected to the cathode of the second thyristor S2, the second end of the seventh thyristor S7 and the other end of the third thyristor S3, the anode of the fourth thyristor S4 is connected to the cathode of the third diode D3, and the control end of the fourth thyristor S4 and the control end of the third thyristor S3 are respectively connected to the IO7 end and IO6 end of the first controller U1.

[0027] In a specific embodiment, the third thyristor S3 may be a bidirectional thyristor; and the fourth thyristor S4 may be a unidirectional thyristor.

[0028] Furthermore, the first mode module 4 includes a fifth thyristor S5, a sixth thyristor S6, a sixth diode D6 and a sixth capacitor C6; Specifically, one end of the fifth thyristor S5 is connected to one end of the sixth thyristor S6 and the drain of the third power tube Q3, the other end of the fifth thyristor S5 is connected to the anode of the sixth diode D6 and grounded through the sixth capacitor C6, the other end of the sixth thyristor S6 is connected to the cathode of the fifth diode D5, the cathode of the sixth diode D6 is connected to the anode of the third diode D3, and the control end of the fifth thyristor S5 and the control end of the sixth thyristor S6 are respectively connected to the IO7 end and IO8 end of the first controller U1.

[0029] In a specific embodiment, both the fifth thyristor S5 and the sixth thyristor S6 can be bidirectional thyristors.

[0030] Furthermore, the second mode module 5 includes a first logic chip J1, a second logic chip J2 and a first inverter J3; Specifically, the A and B terminals of the first logic chip J1 are respectively connected to the IO5 and IO6 terminals of the first controller U1, the input terminal of the first inverter J3 is connected to the IO7 terminal of the first controller U1, the A and B terminals of the second logic chip J2 are respectively connected to the Y terminal of the first logic chip J1 and the output terminal of the first inverter J3, and the Y terminal of the second logic chip J2 is connected to the control terminal of the first thyristor S1.

[0031] In a specific embodiment, the first logic chip J1 may be an OR gate chip; the second logic chip J2 may be an AND gate chip; and the first inverter J3 may be a NOT gate chip.

[0032] In a thyristor LED dimming control circuit of this embodiment, DC power is connected to the power interface. When dimming control and parallel lighting control are not required, the IO4 terminal of the first controller U1 controls the seventh thyristor S7 to be turned on. When only the first LED group is required to perform lighting work, the IO5 terminal of the first controller U1 controls the second thyristor S2 to be turned on. When the first LED group and the second LED group perform series lighting work, the IO6 terminal of the first controller U1 controls the third thyristor S3 to be turned on. At the same time, the IO1 terminal of the first controller U1 controls the first power tube Q1 to be turned on, and cooperates with the first inductor L1 and the second The inductor L2, the first diode D1, the first capacitor C1, the second diode D2, the third diode D3 and the third capacitor C3 perform power regulation processing to meet the drive control of the first LED group and the second LED group. When it is necessary to control the first LED group, the second LED group and the third LED group to be illuminated in series, the first logic chip J1 and the first inverter J3 provide a high level to the second logic chip J2, so that the second logic chip J2 triggers the first thyristor S1 to turn on, and the IO1 end of the first controller U1 controls the first power tube Q1 to turn on, and then cooperates with the first inductor L1 and the second inductor L 2. The first diode D1, the first capacitor C1, the second capacitor C2, the third diode D3 and the third capacitor C3 perform a self-superposition and voltage boosting process on the electric energy to meet the driving power of the LED group in the series state. When the first LED group and the third LED group need to be powered in parallel, the IO7 terminal of the first controller U1 controls the fourth thyristor S4 and the fifth thyristor S5 to be turned on. At the same time, the IO2 and IO3 terminals of the first controller U1 control the conduction state of the second power tube Q2 and the third power tube Q3, and cooperate with the third inductor L3, the fourth inductor L4 and the fifth capacitor C5 to perform a voltage boosting process, and with The electric energy output by the first power module 2 is subjected to electric energy compensation and current boosting processing. When dimming control is required for the first LED module 6, the second LED module 7 and the third LED module 8, the first controller U1 stops controlling the conduction of the seventh thyristor S7 or the fifth thyristor S5, and the IO8 end of the first controller U1 controls the conduction of the sixth thyristor S6. At the same time, the first controller U1 controls the conduction state of the second power tube Q2 and the third power tube Q3 to realize step-down power supply, and then adjusts the output potential of the first LED module 6, the second LED module 7 and the third LED module 8, and then performs dimming control.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0034] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A thyristor LED dimming control circuit, characterized in that: The thyristor LED dimming control circuit includes: Power module, used to access DC power; a first power module, connected to the power module, configured to perform power regulation and voltage boosting on the DC power and output a first electric energy, and to perform self-superposition processing on the processed electric energy and output a second electric energy; a second power module, connected to the power module, configured to boost the DC power and output a third electric energy, and to reduce the DC power and output a fourth electric energy; a first mode module connected to the second power module, the first power module, the first LED module, the second LED module, and the third LED module, configured to transmit the third electrical energy to the first power module and perform electrical energy compensation and current boosting processing on the first electrical energy, transmit the fourth electrical energy to the first LED module, the second LED module, and the third LED module, and adjust the lighting brightness of the first LED module, the second LED module, and the third LED module; The second mode module is connected to the first power module and is used to control the first power module to perform power self-addition when the micro-control module does not change the connection state of the first LED module, the second LED module and the third LED module; A first LED module is connected to the first power module and is used for lighting; A second LED module is connected to the first LED module and is used for series lighting operation with the first LED module; a third LED module connected to the first LED module and the second LED module, for performing a series lighting operation with the first LED module and the second LED module, and performing a parallel lighting operation with the first LED module; The microcontroller module is connected to the first mode module, the second mode module, the first power tube module, the second power tube module, the first LED module, the second LED module and the third LED module, and is used to control the first power module to perform power adjustment when the first LED module is controlled to perform individual lighting or the first LED module and the second LED module are connected in series for lighting; when the connection status of the first LED module, the second LED module and the third LED module is not changed, the microcontroller module is controlled to perform voltage boost regulation; when the first LED module and the third LED module are controlled to perform parallel lighting, the microcontroller module is controlled to perform power compensation and current boost processing; when the lighting brightness of the first LED module, the second LED module or the third LED module needs to be adjusted, the microcontroller module is controlled to transmit the fourth power and stop the power compensation and current boost operations of the first mode module.

2. The thyristor LED dimming control circuit according to claim 1, characterized in that: The power module includes a power interface; the first power module includes a first inductor, a first transformer, a first thyristor, a second inductor, a first power tube, a first diode, a first capacitor, a second diode, a second capacitor, a seventh thyristor, a third diode and a third capacitor; the micro control module includes a first controller; The first end of the power interface is connected to the first end of the primary side of the first transformer and is connected to one end of the second inductor and one end of the first thyristor through the first inductor. The other end of the first thyristor is connected to the second end of the primary side of the first transformer. The other end of the second inductor is connected to the drain of the first power tube and the anode of the first diode. The cathode of the first diode is connected to one end of the first capacitor, the anode of the second diode and the first end of the secondary side of the first transformer. The second end of the secondary side of the first transformer is connected to the cathode of the second diode and the anode of the third diode through the second capacitor. The cathode of the third diode is connected to the other end of the first capacitor, the first end of the seventh thyristor, the source of the first power tube, the second end of the power interface and the ground through the third capacitor. The gate of the first power tube is connected to the IO1 end of the first controller, the control end of the first thyristor is connected to the second mode module, and the control end of the seventh thyristor is connected to the IO4 end of the first controller.

3. The thyristor LED dimming control circuit according to claim 2, characterized in that: The second power module includes a third inductor, a fourth capacitor, a fourth inductor, a second power tube, a fifth capacitor and a third power tube; One end of the fourth capacitor is connected to the drain of the second power tube and is connected to the first end of the power interface through the third inductor. The source of the second power tube is connected to the drain of the third power tube, one end of the fifth capacitor and the first mode module. The source of the third power tube is connected to the other end of the fourth capacitor and is connected to the other end of the fifth capacitor and the second end of the power interface through the fourth inductor. The gate of the second power tube and the gate of the third power tube are respectively connected to the IO2 end and IO3 end of the first controller.

4. The thyristor LED dimming control circuit according to claim 3, characterized in that: The first LED module includes a first LED group and a second thyristor; The first end of the first LED main is connected to the cathode of the third diode, the second end of the first LED group is connected to the anode of the second thyristor, the cathode of the second thyristor is connected to the first mode module, and the control end of the second thyristor is connected to the IO5 end of the first controller and the cathode of the third diode.

5. The thyristor LED dimming control circuit according to claim 4, characterized in that: The second LED module includes a second LED group, a fourth diode and a third thyristor; the third LED module includes a fourth thyristor, a third LED group and a fifth diode; The first end of the second LED group is connected to the second end of the first LED group, the second end of the second LED group is connected to the anode of the fourth diode, the cathode of the fourth diode is connected to the cathode of the fourth thyristor, one end of the third thyristor and the first end of the third LED group, the second end of the third LED group is connected to the anode of the fifth diode, the cathode of the fifth diode is connected to the cathode of the second thyristor, the second end of the seventh thyristor and the other end of the third thyristor, the anode of the fourth thyristor is connected to the cathode of the third diode, and the control end of the fourth thyristor and the control end of the third thyristor are respectively connected to the IO7 end and IO6 end of the first controller.

6. The thyristor LED dimming control circuit according to claim 5, characterized in that: The first mode module includes a fifth thyristor, a sixth thyristor, a sixth diode and a sixth capacitor; One end of the fifth thyristor is connected to one end of the sixth thyristor and the drain of the third power tube, the other end of the fifth thyristor is connected to the anode of the sixth diode and grounded through the sixth capacitor, the other end of the sixth thyristor is connected to the cathode of the fifth diode, the cathode of the sixth diode is connected to the anode of the third diode, and the control end of the fifth thyristor and the control end of the sixth thyristor are respectively connected to the IO7 end and IO8 end of the first controller.

7. The thyristor LED dimming control circuit according to claim 6, characterized in that: The second mode module includes a first logic chip, a second logic chip and a first inverter; The A and B terminals of the first logic chip are respectively connected to the IO5 and IO6 terminals of the first controller, the input terminal of the first inverter is connected to the IO7 terminal of the first controller, the A and B terminals of the second logic chip are respectively connected to the Y terminal of the first logic chip and the output terminal of the first inverter, and the Y terminal of the second logic chip is connected to the control terminal of the first thyristor.

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