Load regulation rate optimization circuit for wide-load LED driving power supply

Abstract

The utility model discloses a load regulation rate optimization circuit for a wide-load LED driving power supply, which relates to the technical field of LED lighting and comprises a voltage input module used for converting alternating current into direct current and outputting the direct current; the input undervoltage and overvoltage protection module is used for detecting the voltage condition of the voltage input module and feeding back the voltage condition to the control module; compared with the prior art, the beneficial effects of the utility model are that through the arrangement of the current compensation module, the current compensation module feeds back the voltage change information to the control module when the LED load is increased or decreased to cause the voltage change at the LED load, so that the control module changes the duty ratio of the driving output and finally changes the output current of the voltage output module; the current flowing through the LED load is kept stable, and the problems of large power error and large brightness fluctuation caused by the change of the output current along with the increase and decrease of the LED load (the change of the voltage at the LED load) are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to LED lighting technical field, concretely is a kind of wide load LED drive power load regulation rate optimization circuit. BACKGROUND

[0002] At present, LED lighting is widely used, so it needs efficient and stable LED drive power. However, the existing LED drive power may have the problem of poor load regulation rate when facing different loads, which leads to the problems of large power error and large brightness fluctuation when selecting LED drive power, and needs to be improved. UTILITY MODEL CONTENTS

[0003] The utility model aims at providing a kind of wide load LED drive power load regulation rate optimization circuit to solve the problems raised in the above background technology.

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

[0005] A kind of wide load LED drive power load regulation rate optimization circuit, comprising:

[0006] Voltage input module, for converting alternating current into direct current output;

[0007] Input under-voltage and over-voltage protection module, for detecting the voltage condition of voltage input module, feedback to control module;

[0008] High-voltage starting module, for providing starting voltage for control module when circuit starts;

[0009] BOOST boost module, for receiving the control of control module, the direct current output by voltage input module is boosted and output to voltage output module;

[0010] Overpower protection module, for detecting the output power of BOOST boost module, feedback to control module;

[0011] Voltage output module, for receiving the output voltage of BOOST boost module, processes and outputs direct current to supply LED load;

[0012] Output voltage feedback module, for sampling the voltage of voltage output module, feedback to control module;

[0013] Current compensation module, for changing the signal size of feedback to control module when the sampling voltage of output voltage feedback module reaches starting value, and then changing the duty cycle of drive output through control module, finally maintaining the current flowing through LED load smooth;

[0014] Power supply module, for providing working voltage for control module;

[0015] A control module is configured to comprehensively control the circuit operation.

[0016] The voltage input module is connected with the under-voltage and over-voltage protection module, the high-voltage starting module and the BOOST module. The under-voltage and over-voltage protection module is connected with the control module. The high-voltage starting module is connected with the control module. The BOOST module is connected with the over-power protection module, the voltage output module and the output voltage feedback module. The over-power protection module is connected with the control module. The output voltage feedback module is connected with the control module and the current compensation module. The current compensation module is connected with the control module. The power supply module is connected with the control module.

[0017] As a further scheme of the utility model: the input under-voltage and over-voltage protection module includes diode D6, diode D8, resistance R7, capacitor C8, the positive pole of diode D6 is connected with voltage input module, the positive pole of diode D8 is connected with voltage input module, the negative pole of diode D6 is connected with the negative pole of diode D8 and one end of resistance R7, the other end of resistance R7 is connected with one end of capacitor C8 and control module, the other end of capacitor C8 is grounded.

[0018] As a further scheme of the utility model: the high-voltage starting module includes resistance R3, resistance R5, triode Q2, diode D7, one end of resistance R3 is connected with one end of resistance R5 and voltage input module, the other end of resistance R3 is connected with the collector of triode Q2, the other end of resistance R5 is connected with the base of triode Q2 and control module, the emitter of triode Q2 is connected with the positive pole of diode D7, and the negative pole of diode D7 is connected with control module.

[0019] As a further scheme of the utility model: BOOST boost module includes transformer L1, diode D1, diode D2, triode Q1, resistance R11, resistance R2, capacitor C10, capacitor C2, capacitor C1, resistance R1, diode D5, MOS tube Q4, resistance R12, the fourth end of transformer L1 is connected voltage input module, diode D1's positive pole, the sixth end of voltage ware L1 is connected control module through resistance R8, the tenth end of transformer L1 is grounded, the first end of voltage ware L1 is connected triode Q1's collector, diode D2's positive pole, the emitter of triode Q1 is connected one end of resistance R11, control module, the other end of resistance R11 is grounded, the base of triode Q1 is connected control module, diode D1's negative pole is connected diode D2's negative pole, one end of resistance R2, one end of capacitor C2, one end of capacitor C1, one end of resistance R1, the first end of transformer T1, the other end of resistance R2 is connected control module, one end of capacitor C10, the other end of capacitor C10 is grounded, the other end of capacitor C2 is grounded, the other end of capacitor C1 is connected the other end of resistance R1, the negative pole of diode D5, the positive pole of diode D5 is connected the third end of transformer T1, the D pole of MOS tube Q4, the S pole of MOS tube Q4 is connected over-power protection module, the G pole of MOS tube Q4 is connected control module through resistance R12.

[0020] As a further scheme of the utility model: over-power protection module includes resistance R18, resistance R13, capacitor C12, one end of resistance R18 is connected one end of resistance R13, BOOST boost module, the other end of resistance R18 is grounded, the other end of resistance R13 is connected control module, one end of capacitor C12, the other end of capacitor C12 is grounded.

[0021] As a further scheme of the utility model: output voltage feedback module includes resistance R10, resistance R16, capacitor C11, one end of resistance R10 is connected diode D9's positive pole, the fourth end of transformer T1, the fifth end of transformer T1 is grounded, the negative pole of diode D9 is connected one end of resistance R6, the other end of resistance R6 is connected one end of capacitor C7, current compensation module, the other end of capacitor C7 is grounded, the other end of resistance R10 is connected one end of resistance R16, one end of capacitor C11, control module, the other end of capacitor C11 is grounded, the other end of resistance R16 is grounded.

[0022] As a further scheme of the utility model: the current compensation module includes diode ZD2, resistance R15, triode Q5, triode Q6, resistance R14, the negative pole of diode ZD2 is connected output voltage feedback module, the positive pole of diode ZD2 is connected one end of resistance R15, the other end of resistance R15 is connected the base of triode Q5, the base of triode Q6, the collector of triode Q6, the emitter of triode Q6 is directly grounded or grounded through a resistance, the emitter of triode Q5 is directly grounded or grounded through a resistance, the collector of triode Q5 is connected one end of resistance R14, the other end of resistance R14 is connected control module.

[0023] As a further scheme of the utility model: the control module includes chip U1, the model of chip U1 is IW3617 or IW3616, the 7th pin of chip U1 is connected power supply module, the 2nd pin of chip U1 is connected input undervoltage and overvoltage protection module, the 6th pin of chip U1 is connected high voltage starting module, the 4th pin and the 10th pin of chip U1 are connected BOOST boost module, the 11th pin of chip U1 is connected over-power protection module and current compensation module, the 12th pin of chip U1 is connected output voltage feedback module.

[0024] Compared with the prior art, the utility model has the advantages that: the utility model discloses through setting up current compensation module, when the voltage at LED load changes due to the increase and decrease of LED load, current compensation module feeds back voltage change information to control module, so that control module changes the duty cycle of driving output, finally changes the output current of voltage output module, maintains the current stability of flowing through LED load, avoids the problem of big power error and big brightness fluctuation caused by the change of output current with the increase and decrease of LED load (voltage change at LED load). BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a kind of wide load LED drive power load regulation rate optimization circuit circuit diagram.

[0026] Figure 2 It is the simulation circuit diagram of current compensation module.

[0027] Figure 3 It is the simulation waveform diagram of current compensation module.

[0028] Figure 4 It is another structure circuit diagram of current compensation module. DETAILED DESCRIPTION

[0029] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments, and based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0030] Please refer to Figure 1 A wide load LED drive power load regulation rate optimization circuit, comprising:

[0031] A voltage input module is used for converting alternating current into direct current output;

[0032] An input under-voltage and over-voltage protection module is used for detecting the voltage condition of the voltage input module and feeding back to the control module;

[0033] A high-voltage starting module is used for providing a starting voltage for the control module when the circuit starts;

[0034] A BOOST module is used for receiving the control of the control module, boosting the direct current output by the voltage input module and outputting to the voltage output module;

[0035] An over-power protection module is used for detecting the output power of the BOOST module and feeding back to the control module;

[0036] A voltage output module is used for receiving the output voltage of the BOOST module, processing and outputting direct current to supply the LED load;

[0037] An output voltage feedback module is used for sampling the voltage of the voltage output module and feeding back to the control module;

[0038] A current compensation module is used for changing the signal size fed back to the control module when the sampling voltage of the output voltage feedback module reaches the starting value, and then changing the duty cycle of the driving output through the control module, so as to finally maintain the smooth current flowing through the LED load;

[0039] A power supply module is used for providing a working voltage for the control module;

[0040] A control module is used for comprehensively controlling the circuit working;

[0041] The voltage input module is connected with an input under-voltage and over-voltage protection module, a high-voltage starting module and a BOOST module, the input under-voltage and over-voltage protection module is connected with a control module, the high-voltage starting module is connected with the control module, the BOOST module is connected with an over-power protection module, a voltage output module and an output voltage feedback module, the over-power protection module is connected with the control module, the output voltage feedback module is connected with the control module and a current compensation module, the current compensation module is connected with the control module, and a power supply module is connected with the control module.

[0042] In specific embodiments, please refer to Figure 1 In the voltage input module, the interface CN1 is an AC input terminal, 220V AC is introduced, overcurrent and short circuit protection is provided by the fuse F1, lightning pulse protection is provided by the temperature-sensitive resistor RV1, EMC common mode filter is provided by the common mode choke L3 and the capacitor CX1, full-wave rectification is provided by the rectifier bridge D4, and differential mode filter is provided by the capacitors C3 and C4 and the inductor L2.

[0043] In the voltage output module, the output voltage of the BOOST module is output through the transformer T1 (specifically the input and output terminals T1-A of the transformer), and is output to the LED load through the diode D3 and the capacitor C5 through the interface CN2.

[0044] In the power supply module, the fourth and fifth terminals of the transformer T1 (specifically the auxiliary winding T1-B of the transformer) form a voltage, which is input to the triode Q3, at this time the diode ZD1 is turned on, the base of the triode Q3 is the stable voltage value of the diode ZD1, and the triode Q3 is turned on to supply power to the control module.

[0045] In the present embodiment, please refer to Figure 1 The input under-voltage and over-voltage protection module includes a diode D6, a diode D8, a resistor R7 and a capacitor C8, the positive electrode of the diode D6 is connected with the voltage input module, the positive electrode of the diode D8 is connected with the voltage input module, the negative electrode of the diode D6 is connected with the negative electrode of the diode D8 and one end of the resistor R7, the other end of the resistor R7 is connected with one end of the capacitor C8 and the control module, and the other end of the capacitor C8 is grounded.

[0046] The voltage of the voltage input module is collected through the diode D6 and the diode D8, and is output to the control module through the resistor R7, and the control module acquires the information in time when the input voltage is abnormal.

[0047] In the present embodiment, please refer to Figure 1, the high-voltage starting module includes resistance R3, resistance R5, triode Q2, diode D7, one end of the resistance R3 is connected with one end of the resistance R5, voltage input module, the other end of the resistance R3 is connected with the collector of the triode Q2, the other end of the resistance R5 is connected with the base of the triode Q2, control module, the emitter of the triode Q2 is connected with the positive electrode of the diode D7, and the negative electrode of the diode D7 is connected with the control module.

[0048] Under normal conditions, the base of the triode Q2 is low level, when the circuit is powered on, the triode Q2 is turned on, the control module is powered through the diode D7, and the high-voltage starting of the control module is carried out.

[0049] In the embodiment, please refer to Figure 1 , the BOOST voltage boosting module includes transformer L1, diode D1, diode D2, triode Q1, resistance R11, resistance R2, capacitor C10, capacitor C2, capacitor C1, resistance R1, diode D5, MOS tube Q4 and resistance R12, the fourth end of the transformer L1 is connected with the positive electrode of the diode D1, the sixth end of the voltage transformer L1 is connected with the control module through the resistance R8, the tenth end of the transformer L1 is grounded, the first end of the voltage transformer L1 is connected with the collector of the triode Q1 and the positive electrode of the diode D2, the emitter of the triode Q1 is connected with one end of the resistance R11 and the control module, the other end of the resistance R11 is grounded, the base of the triode Q1 is connected with the control module, the negative electrode of the diode D1 is connected with the negative electrode of the diode D2, one end of the resistance R2, one end of the capacitor C2, one end of the capacitor C1, one end of the resistance R1 and the first end of the transformer T1, the other end of the resistance R2 is connected with the control module and one end of the capacitor C10, the other end of the capacitor C10 is grounded, the other end of the capacitor C2 is grounded, the other end of the capacitor C1 is connected with the other end of the resistance R1, the negative electrode of the diode D5, the positive electrode of the diode D5 is connected with the third end of the transformer T1 and the D pole of the MOS tube Q4, the S pole of the MOS tube Q4 is connected with the over-power protection module, and the G pole of the MOS tube Q4 is connected with the control module through the resistance R12.

[0050] The control module controls the current state on the inductor L1 by controlling the conduction frequency of the triode Q1, changes the voltage size on the capacitor C2 finally, and forms a voltage boosting circuit. The resistance R1, the capacitor C1 and the diode D5 constitute a reflected voltage peak absorption circuit, process the peak voltage at the transformer T1, the control module provides a driving PWM signal through the resistance R12 to control the conduction state of the MOS tube Q4, to control the current flowing state of the first end and the third end of the transformer T1, to adjust the output size, and the flyback power conversion circuit is composed of the transformer T1 and the MOS tube Q4.

[0051] In the embodiment, please refer to Figure 1The over-power protection module comprises a resistor R18, a resistor R13, and a capacitor C12, one end of the resistor R18 is connected to one end of the resistor R13, the BOOST module, the other end of the resistor R18 is grounded, the other end of the resistor R13 is connected to the control module and one end of the capacitor C12, and the other end of the capacitor C12 is grounded.

[0052] The constant current signal is output to the control module through the resistor R13, and the output state at the transformer T1 is sampled through the resistor R18, the voltage signal is obtained on the resistor R18, the greater the output voltage at the transformer T1, the greater the power output to the control module (the current is constant, and the voltage is increased), and the power information is fed back to the control module, so that the control module is timely processed in the case of power abnormality.

[0053] In the embodiment, refer to Figure 1 The output voltage feedback module comprises a resistor R10, a resistor R16, and a capacitor C11, one end of the resistor R10 is connected to the positive electrode of a diode D9 and the fourth end of the transformer T1, the fifth end of the transformer T1 is grounded, the negative electrode of the diode D9 is connected to one end of a resistor R6, the other end of the resistor R6 is connected to one end of a capacitor C7 and the current compensation module, the other end of the capacitor C7 is grounded, the other end of the resistor R10 is connected to one end of the resistor R16 and one end of the capacitor C11 and the control module, the other end of the capacitor C11 is grounded, and the other end of the resistor R16 is grounded.

[0054] The voltage information output to the LED lamp by the voltage output module is obtained through the voltage information of the fourth end and the fifth end of the transformer T1, the voltage of the fourth end and the fifth end of the transformer T1 is taken as a sampling voltage, the resistors R10 and R16 are divided, the voltage on the resistor R16 is filtered through the capacitor C11 and then output to the control module, the control module obtains the output voltage information, and the low output no-load voltage and the output overvoltage protection are maintained.

[0055] In the embodiment, refer to Figure 1 and Figure 4 The current compensation module comprises a diode ZD2, a resistor R15, a triode Q5, a triode Q6, and a resistor R14, the negative electrode of the diode ZD2 is connected to the output voltage feedback module, the positive electrode of the diode ZD2 is connected to one end of the resistor R15, the other end of the resistor R15 is connected to the base of the triode Q5, the base of the triode Q6, and the collector of the triode Q6, the emitter of the triode Q6 is directly grounded or grounded through a resistor, the emitter of the triode Q5 is directly grounded or grounded through a resistor, one end of the collector of the triode Q5 is connected to one end of the resistor R14, and the other end of the resistor R14 is connected to the control module.

[0056] The triode Q5, Q6 is made up of two tubes with the same characteristics. Since the c, b poles (collector, base) of the triode Q6 are connected, Uce=Ube, that is, the triode Q6 is in an amplification state, and let the current amplification coefficient be β, the collector current Ic=β*Ib. In addition, the b, e (base, emitter) of the triodes Q5, Q6 are connected respectively, so the base current Ib5=Ib6=Ib of the triodes Q5, Q6. Then the collector currents IC Q5 =IC Q6 =Ic=β*Ib. It can be seen that, due to the special connection of the circuit, the collector currents IC Q4 and IC Q5 of the two tubes are in a mirror image relationship, so this circuit is called a mirror constant current source.

[0057] The diode ZD2 is a 7.5V-12V voltage stabilizing diode, which obtains the voltage VREF processed at the auxiliary winding (T1-B) of the transformer T1, and the auxiliary winding voltage is proportional to the output load voltage, and the proportion coefficient n is the turn ratio of the transformer windings N2:N3.

[0058] For example: when the voltage signal of VREF increases with the increase of the LED load voltage. The current flowing through the base of the triode Q6 increases, and according to the working principle of the mirror current source, the current flowing through the resistor R14 of the triode Q5 also increases, so that the voltage division signal of the resistors R13 and R14 attenuates more, and the signal entering the pin 11 (FISNS pin) of the chip U1 becomes smaller. The chip U1 increases the PWM duty cycle output of the pin 10 (FDRV pin) of the chip U1 according to the current signal through the internal negative feedback, increases the output current, and finally maintains the current on the LED load stable, and does not fluctuate with the output load.

[0059] In another embodiment: the current compensation module cannot avoid the present application when building a similar functional circuit by appropriately increasing or decreasing the resistance. It is similar in the spirit of the new practical type and needs to be protected.

[0060] In another embodiment: the current compensation module cannot avoid the present application when building a similar functional circuit by replacing the triodes Q5, Q6 with other types of switching tubes. It is similar in the spirit of the new practical type and needs to be protected.

[0061] In another embodiment: the current compensation module cannot avoid the present application when building a similar functional circuit by appropriately changing the voltage stabilizing value of the voltage stabilizing diode ZD2. It is similar in the spirit of the new practical type and needs to be protected.

[0062] In the present embodiment: please refer to Figure 1The control module comprises a chip U1, the model number of the chip U1 is IW3617 or IW3616, the 7th pin of the chip U1 is connected with the power supply module, the 2nd pin of the chip U1 is connected with the input under-voltage and over-voltage protection module, the 6th pin of the chip U1 is connected with the high-voltage starting module, the 4th pin and the 10th pin of the chip U1 are connected with the BOOST voltage boosting module, the 11th pin of the chip U1 is connected with the over-power protection module and the current compensation module, and the 12th pin of the chip U1 is connected with the output voltage feedback module.

[0063] The chip U1 is a comprehensive control circuit, and the model number can be selected as IW3617 or IW3616.

[0064] Please refer to Figure 2 , Figure 3 In order to make the description clearer, a simulation circuit diagram is established, as shown in Figure 2 From the simulation waveform of Figure 3 , it can be known that the circuit starts to work from the VREF signal of about 12V, and the FISNS signal (the longitudinal axis) starts to decrease with the Vref signal.

[0065] The actual test data are shown in the following table:

[0066]

[0067]

[0068] In the prior art, the power error and the brightness fluctuation are large due to the change of the output current caused by the change of the LED load (the voltage change at the LED load), and from the above table, it can be known that the load adjustment rate is optimized from 11.28% to 1.82% after the application of the application, and the effect is very obvious.

[0069] The working principle of the utility model is: voltage input module is used for converting alternating current into direct current output; input under-voltage and over-voltage protection module is used for detecting voltage condition of voltage input module, and feedback is given to control module; high voltage starting module is used for providing starting voltage for control module when circuit starts; BOOST voltage increasing module is used for receiving control of control module, and after voltage increasing of direct current output of voltage input module, output is given to voltage output module; over-power protection module is used for detecting output power of BOOST voltage increasing module, and feedback is given to control module; voltage output module is used for receiving output voltage of BOOST voltage increasing module, and after processing, direct current is output for LED load; output voltage feedback module is used for sampling voltage of voltage output module, and feedback is given to control module; current compensation module is used for changing signal size of feedback to control module when sampling voltage of output voltage feedback module reaches starting value, and then through control module, duty cycle of driving output is changed, and finally current flowing through LED load is maintained stable; power supply module is used for providing working voltage for control module; control module is used for comprehensively controlling circuit working.

[0070] It is apparent for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model.

[0071] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A wide-load LED driver power supply load regulation optimization circuit, characterized in that, This wide-load LED driver power supply load regulation optimization circuit includes: The voltage input module is used to convert AC power into DC power output. The input undervoltage and overvoltage protection module is used to detect the voltage status of the voltage input module and feed it back to the control module; The high-voltage starting module is used to provide the starting voltage to the control module when the circuit starts up; The BOOST boost module receives control from the control module and boosts the DC power output from the voltage input module before outputting it to the voltage output module. The over-power protection module is used to detect the output power of the BOOST boost module and feed it back to the control module; The voltage output module receives the output voltage from the BOOST boost module, processes it, and outputs DC power to supply the LED load. The output voltage feedback module is used to sample the voltage of the voltage output module and feed it back to the control module; The current compensation module is used to change the signal size fed back to the control module when the sampling voltage of the output voltage feedback module reaches the start value. In turn, the control module changes the duty cycle of the drive output, and finally maintains a stable current flowing through the LED load. The power supply module is used to provide operating voltage to the control module; The control module is used for the operation of the integrated control circuit. The voltage input module is connected to the input undervoltage and overvoltage protection module, the high-voltage start module, and the BOOST boost module. The input undervoltage and overvoltage protection module is connected to the control module. The high-voltage start module is connected to the control module. The BOOST boost module is connected to the overpower protection module, the voltage output module, and the output voltage feedback module. The overpower protection module is connected to the control module. The output voltage feedback module is connected to the control module. The current compensation module is connected to the control module. The power supply module is connected to the control module. The current compensation module includes diode ZD2, resistor R15, transistor Q5, transistor Q6, and resistor R14. The negative terminal of diode ZD2 is connected to the output voltage feedback module, and the positive terminal of diode ZD2 is connected to one end of resistor R15. The other end of resistor R15 is connected to the base of transistor Q5, the base of transistor Q6, and the collector of transistor Q6. The emitter of transistor Q6 is directly grounded or grounded through a resistor. The emitter of transistor Q5 is directly grounded or grounded through a resistor. The collector of transistor Q5 is connected to one end of resistor R14, and the other end of resistor R14 is connected to the control module.

2. The wide-load LED driver power supply load regulation optimization circuit according to claim 1, characterized in that, The input undervoltage and overvoltage protection module includes diode D6, diode D8, resistor R7, and capacitor C8. The positive terminal of diode D6 is connected to the voltage input module, the positive terminal of diode D8 is connected to the voltage input module, the negative terminal of diode D6 is connected to the negative terminal of diode D8, one end of resistor R7 is connected to one end of capacitor C8, the control module is connected to the control module, and the other end of capacitor C8 is grounded.

3. The wide-load LED driver power supply load regulation optimization circuit according to claim 1, characterized in that, The high-voltage start-up module includes resistor R3, resistor R5, transistor Q2, and diode D7. One end of resistor R3 is connected to one end of resistor R5 and the voltage input module. The other end of resistor R3 is connected to the collector of transistor Q2. The other end of resistor R5 is connected to the base of transistor Q2 and the control module. The emitter of transistor Q2 is connected to the anode of diode D7, and the cathode of diode D7 is connected to the control module.

4. The wide-load LED driver power supply load regulation optimization circuit according to claim 1, characterized in that, The BOOST boost module includes a transformer L1, diodes D1 and D2, a transistor Q1, resistors R11 and R2, capacitors C10, C2, and C1, resistor R1, diode D5, MOSFET Q4, and resistor R12. The fourth terminal of transformer L1 is connected to the voltage input module and the positive terminal of diode D1. The sixth terminal of transformer L1 is connected to the control module via resistor R8. The tenth terminal of transformer L1 is grounded. The first terminal of transformer L1 is connected to the collector of transistor Q1 and the positive terminal of diode D2. The emitter of transistor Q1 is connected to one end of resistor R11 and the control module. The other end of resistor R11 is grounded. The base of diode 1 is connected to the control module. The negative terminal of diode D1 is connected to the negative terminal of diode D2, one end of resistor R2, one end of capacitor C2, one end of capacitor C1, one end of resistor R1, the first terminal of transformer T1, the other end of resistor R2 is connected to the control module, one end of capacitor C10 is grounded, the other end of capacitor C2 is grounded, the other end of capacitor C1 is connected to the other end of resistor R1, the negative terminal of diode D5, the positive terminal of diode D5 is connected to the third terminal of transformer T1, the drain terminal of MOSFET Q4, the source terminal of MOSFET Q4 is connected to the overpower protection module, and the gate terminal of MOSFET Q4 is connected to the control module through resistor R12.

5. The wide-load LED driver power supply load regulation optimization circuit according to claim 1, characterized in that, The overpower protection module includes resistor R18, resistor R13, and capacitor C12. One end of resistor R18 is connected to one end of resistor R13 and the BOOST boost module, and the other end of resistor R18 is grounded. The other end of resistor R13 is connected to the control module and one end of capacitor C12, and the other end of capacitor C12 is grounded.

6. The wide-load LED driver power supply load regulation optimization circuit according to claim 1, characterized in that, The output voltage feedback module includes resistors R10 and R16, and capacitor C11. One end of resistor R10 is connected to the positive terminal of diode D9 and the fourth terminal of transformer T1. The fifth terminal of transformer T1 is grounded. The negative terminal of diode D9 is connected to one end of resistor R6. The other end of resistor R6 is connected to one end of capacitor C7 and the current compensation module. The other end of capacitor C7 is grounded. The other end of resistor R10 is connected to one end of resistor R16, one end of capacitor C11, and the control module. The other end of capacitor C11 is grounded, and the other end of resistor R16 is grounded.

7. The wide-load LED driver power supply load regulation optimization circuit according to claim 1, characterized in that, The control module includes chip U1, model IW3617 or IW3616. Pin 7 of chip U1 is connected to the power supply module, pin 2 of chip U1 is connected to the input undervoltage and overvoltage protection module, pin 6 of chip U1 is connected to the high-voltage start-up module, pins 4 and 10 of chip U1 are connected to the BOOST boost module, pin 11 of chip U1 is connected to the overpower protection module and current compensation module, and pin 12 of chip U1 is connected to the output voltage feedback module.

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