Driving circuit and driver of LED lamp

Abstract

The invention discloses a driving circuit and a driver of an LED lamp, the driving circuit comprises a rectification filtering module, a constant voltage driving circuit module, a flyback module and a secondary rectification module which are connected in sequence, the rectification filtering module comprises a first difference and common mode inductance unit and a rectifier bridge unit, the input end of the first difference and common mode inductance unit is connected with external alternating current, and the output end of the first difference and common mode inductance unit is connected with external alternating current. The output end is connected with the input end of the rectifier bridge unit, and the output end of the rectifier bridge unit is connected with the constant-voltage driving circuit module; the first differential and common mode inductor unit is used for receiving external alternating current and suppressing common mode current and filtering differential mode interference noise for the received alternating current, and the rectifier bridge unit is used for converting the alternating current output by the first differential and common mode inductor unit into direct current. According to the driving circuit of the LED lamp, the differential-common mode integrated inductor integrating the characteristics of the common mode inductor and the differential mode inductor is arranged on the rectifying and filtering module, so that the driving circuit of the LED lamp is simplified.

Description

Technical Field

[0001] The present invention relates to the technical field of LEDs, and in particular to a driving circuit and a driver for an LED lamp. Background Art

[0002] In modern homes, people's control over home appliances is no longer limited to switches, but is remotely controlled by controlling home appliance servers. However, when controlling these large home appliances, electromagnetic interference will be generated, thus affecting the normal operation of home LED lighting equipment drivers. The existing method is to add common-mode inductors and differential-mode inductors to the filter circuit to enhance the anti-interference ability of the LED driver circuit, but the structure of the existing LED driver circuit with anti-interference ability is relatively complex. Summary of the invention

[0003] In order to solve the problem that the existing LED driving circuit with anti-interference capability has a relatively complex structure, the present invention provides a driving circuit and a driver for an LED lamp. The specific technical solution of the present invention is as follows:

[0004] A driving circuit for an LED lamp comprises: a rectifying and filtering module, a constant voltage driving circuit module, a flyback module and a secondary rectifying module connected in sequence, wherein the rectifying and filtering module comprises a first differential common mode inductor unit and a rectifier bridge unit, wherein the input end of the first differential common mode inductor unit is connected to an external alternating current, and the output end is connected to the input end of the rectifier bridge unit, and the output end of the rectifier bridge is connected to the constant voltage driving circuit module; the first differential common mode inductor unit is used to receive external alternating current, and suppress common mode current and filter differential mode interference noise of the received alternating current; the rectifier bridge unit is used to convert the alternating current output by the first differential common mode inductor unit into direct current; the constant voltage driving circuit module is used to adjust the voltage of the direct current output by the rectifier bridge unit to a constant voltage; the flyback module is used to transform the constant voltage output by the constant voltage driving circuit module; the secondary rectifying module is used to perform secondary filtering on the direct current with the transformed constant voltage output by the flyback module, and transmit the filtered direct current to an external LED lamp.

[0005] Furthermore, the rectification and filtering module also includes an AC input interface CON1, a resistor F1, a resistor R16, a capacitor C1, a capacitor CX1, an inductor L4 and a ground terminal GND, the input end of the first differential common mode inductor unit LF3 is connected to the AC input interface CON1 through the resistor F1, the two ends of the capacitor CX1 are respectively connected to the two output ends of the first differential common mode inductor unit LF3, the output end of the first differential common mode inductor unit LF3 is respectively connected to the input end of the rectifier bridge unit DB1 through the resistor R16 and the inductor L4, and the two ends of the capacitor C1 are respectively connected to the two output ends of the rectifier bridge unit DB1.

[0006] Furthermore, the driving circuit also includes a signal input module for receiving external digital signals, the signal input module includes an interface DA1, an interface DA2, an adjustable metal resistor MOV1, an adjustable metal resistor MOV2 and a resistor F2, the adjustable metal resistor MOV1 and the adjustable metal resistor MOV2 are connected in parallel between the interface DA1 and the interface DA2, the interface DA1 is connected to the AC power input interface CON1, and the interface DA2 is connected to the AC power input interface CON1 through the resistor F2.

[0007] Furthermore, the constant voltage drive circuit module includes a constant voltage drive chip U1, a resistor R8, a resistor R9, a resistor R10, a resistor R22, a resistor R27, a resistor R28, a resistor R36, a resistor R38, a resistor R50, a capacitor C6, a capacitor C7, a capacitor C17, a capacitor C22, a diode D1, a diode D6, a diode D10 and a ground terminal GND, and a pin 1 of the constant voltage drive chip U1 is connected to the output end of the rectifier bridge unit DB1 through the resistor R28, the resistor R38 and the resistor R36, a pin 2 is connected to the ground terminal GND through the capacitor C7, a pin 3 is connected to the ground terminal GND, and a pin 4 is connected to the ground terminal GND through the capacitor C6. Connected to the ground terminal GND, pin 4 is connected to the flyback module through resistor R22 and diode D6, pin 4 is connected to the output end of the rectifier bridge unit DB1 through diode D10, resistor R38 and resistor R36, pin 5 is connected to the flyback module through diode D1, pin 6 is connected to pin 5, pin 6 is connected to pin 7 through capacitor C17, pin 7 is connected to the ground terminal GND through resistor R8 and resistor R9 respectively, capacitor C22 and resistor R50 are connected in parallel between pin 1 of the constant voltage drive chip U1 and the ground terminal GND, and resistor R10 and resistor R27 are connected in series between pin 2 of the constant voltage drive chip U1 and the ground terminal GND.

[0008] Furthermore, the model of the constant voltage driving chip U1 is BP2636C.

[0009] Furthermore, the flyback module includes an LED driver chip U4, a transformer T1-A, a resistor R1, a resistor R3, a resistor R6, a resistor R11, a resistor R12, a resistor R14, a resistor R18, a capacitor C4, a capacitor C10, a capacitor C11, a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16, a capacitor C19, a diode D4 and a diode D9. Pin 1 of the LED driver chip U4 is connected to the ground terminal GND through capacitors C14 and C15, respectively, pin 1 is connected to the constant voltage drive circuit module through diode D9, and pin 2 is connected to the constant voltage drive circuit module through capacitors C13 and resistor R14, respectively. The pin 3 is connected to the ground terminal GND through the capacitor C11, the pin 4 is connected to the ground terminal GND through the resistor R18 and the capacitor C16, the pin 5 is connected to the ground terminal GND, the pin 6 is connected to the ground terminal GND through R11 and R12, the pin 6 is connected to the pin 7 through the capacitor C19, the pin 7 is connected to the input end of the transformer T1-A, the pin 7 is connected to the constant voltage drive circuit module through the diode D4, the resistor R1 and the resistor R3, the resistor R6 and the capacitor C10 are connected in parallel between the resistor R1 and the input end of the transformer T1-A, and the capacitor C4 is connected in parallel with the diode D4.

[0010] Furthermore, the model of the LED driver chip U4 is BP3177DG.

[0011] Furthermore, the secondary rectifier and filter module includes a second differential common mode inductor unit LF2, an output interface CONS1, a resistor RS1, a resistor RS2, a capacitor C8, a capacitor CS1, a capacitor CS2, a capacitor CY1 and a diode DS1, wherein pin 1 of the second differential common mode inductor unit LF2 is connected to the output end of the transformer T1-A, pins 2 and 3 are connected to the output interface CONS1, and pin 4 is connected to the output end of the transformer T1-A through a diode DS1, the resistor RS1 and the capacitor CS1 are connected in series and then connected in parallel with the diode DS1, the resistor RS2 and the capacitor CS2 are connected in parallel between pin 1 and pin 4 of the second differential common mode inductor unit LF2, one end of the capacitor CY1 is connected to pin 4 of the second differential common mode inductor unit LF2, and the other end is connected to the ground terminal GND, the two ends of the capacitor C8 are respectively connected to pin 2 and pin 3 of the second differential common mode inductor unit LF2, and the output interface CONS1 is used to be connected to an external LED lamp.

[0012] Furthermore, the drive circuit also includes a standby power supply module, which includes a power supply chip U2, a resistor R7, a resistor R17, a resistor R20, a capacitor C18, a capacitor C20, a polarity capacitor CS3, an inductor L5, a diode D11, a diode D12 and a ground terminal GND. Pin 1 and pin 2 of the power supply chip U2 are connected and then connected to pin 5 through resistor R17. Pin 3 is connected to the flyback module through diode D12, pin 4 is connected to the constant voltage drive circuit module, and pin 5 is connected to inductor L5 through resistor R17. The capacitor C18 and the diode D11 are connected in series between pin 3 of the power supply chip U2 and the ground terminal GND, the resistor R7, the resistor R20 and the capacitor C20 are connected in series between pin 3 of the power supply chip U2 and the ground terminal GND, and the diode D12 and the polarity capacitor CS3 are connected in series between pin 3 of the power supply chip U2 and the ground terminal GND.

[0013] A driver for an LED lamp, the driver comprising the above-mentioned driving circuit for the LED lamp.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: the driving circuit of the LED lamp described in the present application is provided with a differential common-mode integrated inductor which integrates the characteristics of the common-mode inductor and the differential-mode inductor in the rectifier and filter module, which simplifies the driving circuit of the LED lamp and enables the rectifier and filter module to suppress the common-mode current and filter out the differential-mode interference noise, thereby improving the working efficiency of the driving circuit of the LED lamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a driving circuit in one embodiment of the present invention;

[0016] Figure 2 A schematic diagram of a rectifying and filtering module in one embodiment of the present invention;

[0017] Figure 3 A schematic diagram of a constant voltage driving circuit module in one embodiment of the present invention;

[0018] Figure 4 A schematic diagram of a flyback module in one embodiment of the present invention;

[0019] Figure 5 A schematic diagram of a secondary rectifier module in one embodiment of the present invention;

[0020] Figure 6 The figure is a schematic diagram of a standby power supply module in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the specific embodiments of the present invention or equivalent replacement of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed by the present invention.

[0022] like Figures 1 to 6 As shown, a driving circuit of an LED lamp comprises: a rectifier and filter module, a constant voltage drive circuit module, a flyback module and a secondary rectifier module connected in sequence, wherein the rectifier and filter module comprises a first differential common mode inductor unit and a rectifier bridge unit, wherein the input end of the first differential common mode inductor unit is connected to an external alternating current, and the output end is connected to the input end of the rectifier bridge unit, and the output end of the rectifier bridge is connected to the constant voltage drive circuit module; the first differential common mode inductor unit is used to receive external alternating current, and suppress common mode current and filter differential mode interference noise of the received alternating current; the rectifier bridge unit is used to convert the alternating current output by the first differential common mode inductor unit into direct current; the constant voltage drive circuit module is used to adjust the voltage of the direct current output by the rectifier bridge unit to a constant voltage; the flyback module is used to transform the constant voltage output by the constant voltage drive circuit module; the secondary rectifier module is used to perform secondary filtering on the direct current with the transformed constant voltage output by the flyback module, and transmit the filtered direct current to the external LED lamp.

[0023] As one of the embodiments, the rectifier and filter module also includes an AC input interface CON1, a resistor F1, a resistor R16, a capacitor C1, a capacitor CX1, an inductor L4 and a ground terminal GND. The input end of the first differential common mode inductor unit LF3 is connected to the AC input interface CON1 through the resistor F1, and the two ends of the capacitor CX1 are respectively connected to the two output ends of the first differential common mode inductor unit LF3. The output end of the first differential common mode inductor unit LF3 is respectively connected to the input end of the rectifier bridge unit DB1 through the resistor R16 and the inductor L4, and the two ends of the capacitor C1 are respectively connected to the two output ends of the rectifier bridge unit DB1.

[0024] As one embodiment, the driving circuit also includes a signal input module for receiving external digital signals, the signal input module includes an interface DA1, an interface DA2, an adjustable metal resistor MOV1, an adjustable metal resistor MOV2 and a resistor F2, the adjustable metal resistor MOV1 and the adjustable metal resistor MOV2 are connected in parallel between the interface DA1 and the interface DA2, the interface DA1 is connected to the AC power input interface CON1, and the interface DA2 is connected to the AC power input interface CON1 through the resistor F2.

[0025] As one embodiment, the constant voltage drive circuit module includes a constant voltage drive chip U1, a resistor R8, a resistor R9, a resistor R10, a resistor R22, a resistor R27, a resistor R28, a resistor R36, a resistor R38, a resistor R50, a capacitor C6, a capacitor C7, a capacitor C17, a capacitor C22, a diode D1, a diode D6, a diode D10 and a ground terminal GND, and the pin 1 of the constant voltage drive chip U1 is connected to the output end of the rectifier bridge unit DB1 through the resistor R28, the resistor R38 and the resistor R36, the pin 2 is connected to the ground terminal GND through the capacitor C7, the pin 3 is connected to the ground terminal GND, and the pin 4 is connected to the ground terminal GND through the capacitor C7. Capacitor C6 is connected to the ground terminal GND, pin 4 is connected to the flyback module through resistor R22 and diode D6, pin 4 is connected to the output end of the rectifier bridge unit DB1 through diode D10, resistor R38 and resistor R36, pin 5 is connected to the flyback module through diode D1, pin 6 is connected to pin 5, pin 6 is connected to pin 7 through capacitor C17, pin 7 is connected to the ground terminal GND through resistor R8 and resistor R9 respectively, capacitor C22 and resistor R50 are connected in parallel between pin 1 of the constant voltage driver chip U1 and the ground terminal GND, and resistor R10 and resistor R27 are connected in series between pin 2 of the constant voltage driver chip U1 and the ground terminal GND.

[0026] As one of the embodiments, the model of the constant voltage driver chip U1 is BP2636C. BP2636C is a high-efficiency, high PF value, and low THD boost PFC constant voltage driver chip. The chip operates in the critical continuous mode of the inductor current, which helps to optimize EMI and efficiency. BP2636C detects zero crossing through the gate of the MOSFET and does not require an auxiliary winding. At the same time, it uses high-voltage power supply, built-in loop compensation, and built-in MOSFET. Only a few peripheral components are needed to achieve excellent constant voltage characteristics, greatly saving system cost and volume. BP2636C has multiple protection functions, including output overvoltage protection (OVP), MOSFET overcurrent protection, chip temperature overheating protection, etc.

[0027] As one embodiment, the flyback module includes an LED driver chip U4, a transformer T1-A, a resistor R1, a resistor R3, a resistor R6, a resistor R11, a resistor R12, a resistor R14, a resistor R18, a capacitor C4, a capacitor C10, a capacitor C11, a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16, a capacitor C19, a diode D4 and a diode D9, and the pin 1 of the LED driver chip U4 is connected to the ground terminal GND through the capacitor C14 and the capacitor C15 respectively, the pin 1 is connected to the constant voltage drive circuit module through the diode D9, and the pin 2 is connected to the constant voltage drive circuit module through the capacitor C13 and the resistor R14 is connected to the ground terminal GND, pin 3 is connected to the ground terminal GND through capacitor C11, pin 4 is connected to the ground terminal GND through resistor R18 and capacitor C16 respectively, pin 5 is connected to the ground terminal GND, pin 6 is connected to the ground terminal GND through R11 and R12 respectively, pin 6 is connected to pin 7 through capacitor C19, pin 7 is connected to the input end of transformer T1-A, pin 7 is connected to the constant voltage drive circuit module through diode D4, resistor R1 and resistor R3, the resistor R6 and capacitor C10 are connected in parallel between the resistor R1 and the input end of the transformer T1-A, and the capacitor C4 is connected in parallel with the diode D4.

[0028] As one embodiment, the model of the LED driver chip U4 is BP3177DG. BP3177DG is an isolated low PF dimmable LED driver suitable for flyback circuits, supports PWM and analog dimming signals, and fully simulates dimming, which can achieve high-precision, flicker-free lighting.

[0029] The flyback circuit controlled by BP3177DG operates in the critical conduction and quasi-resonant mode of the inductor current, thereby achieving higher conversion efficiency and lower electromagnetic interference (EMI), and improving the utilization rate of the transformer. BP3177DG adopts an advanced primary-side sampling constant current algorithm to achieve excellent linear regulation and load regulation, while eliminating secondary-side feedback components, simplifying the BOM quantity and system cost. BP3177DG provides a wealth of protection functions to ensure the reliability of the power supply design. BP3177DG adopts DIP-7 package. Supports PWM dimming and analog dimming signals, with a dimming depth as low as 1%, and the low end can be shut down. Output current reference accuracy ±3% Good batch consistency during deep dimming Supports a wide output load voltage range Built-in line voltage compensation and load compensation Various protection functions.

[0030] As one of the embodiments, the secondary rectifier and filter module includes a second differential common mode inductor unit LF2, an output interface CONS1, a resistor RS1, a resistor RS2, a capacitor C8, a capacitor CS1, a capacitor CS2, a capacitor CY1 and a diode DS1, wherein pin 1 of the second differential common mode inductor unit LF2 is connected to the output end of the transformer T1-A, pins 2 and 3 are connected to the output interface CONS1, and pin 4 is connected to the output end of the transformer T1-A through a diode DS1, the resistor RS1 and the capacitor CS1 are connected in series and then connected in parallel with the diode DS1, the resistor RS2 and the capacitor CS2 are connected in parallel between pin 1 and pin 4 of the second differential common mode inductor unit LF2, one end of the capacitor CY1 is connected to pin 4 of the second differential common mode inductor unit LF2, and the other end is connected to the ground terminal GND, the two ends of the capacitor C8 are respectively connected to pin 2 and pin 3 of the second differential common mode inductor unit LF2, and the output interface CONS1 is used to be connected to an external LED lamp. The secondary rectification and filtering module suppresses the common mode current and filters out the differential mode interference noise of the received direct current through the second differential common mode unit, thereby improving the stability of the current received by the external LED lamp.

[0031] As one embodiment, the drive circuit also includes a standby power supply module, which includes a power chip U2, a resistor R7, a resistor R17, a resistor R20, a capacitor C18, a capacitor C20, a polar capacitor CS3, an inductor L5, a diode D11, a diode D12 and a ground terminal GND. Pin 1 and pin 2 of the power chip U2 are connected and then connected to pin 5 through a resistor R17. Pin 3 is connected to the flyback module through a diode D12, and pin 4 is connected to the constant voltage drive circuit module. Pin 5 is connected to the inductor L5 through a resistor R17. The capacitor C18 and the diode D11 are connected in series between the pin 3 of the power chip U2 and the ground terminal GND. The resistor R7, the resistor R20 and the capacitor C20 are connected in series between the pin 3 of the power chip U2 and the ground terminal GND. The diode D12 and the polar capacitor CS3 are connected in series between the pin 3 of the power chip U2 and the ground terminal GND. The drive circuit supplies power to the LED in standby mode through the standby power supply module to reduce energy consumption.

[0032] A driver for an LED lamp, the driver comprising the above-mentioned driving circuit for the LED lamp.

[0033] The driving circuit of the LED lamp described in the present application is provided with a differential common-mode integrated inductor that integrates the characteristics of common-mode inductance and differential-mode inductance in the rectifier and filter module. While simplifying the driving circuit of the LED lamp, the rectifier and filter module not only suppresses the common-mode current but also filters out the differential-mode interference noise, thereby improving the working efficiency of the driving circuit of the LED lamp.

[0034] The specific principle of the method can be found in the explanation of the circuit, which will not be repeated here.

[0035] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A driving circuit for an LED lamp, characterized in that: include: A rectifier and filter module, a constant voltage drive circuit module, a flyback module and a secondary rectifier module connected in sequence, wherein the rectifier and filter module comprises a first differential common mode inductor unit and a rectifier bridge unit, wherein the input end of the first differential common mode inductor unit is connected to the external alternating current, and the output end is connected to the input end of the rectifier bridge unit, and the output end of the rectifier bridge is connected to the constant voltage drive circuit module; The first differential common mode inductor unit is used to receive external alternating current, and suppress common mode current and filter differential mode interference noise of the received alternating current. The rectifier bridge unit is used to convert the alternating current output by the first differential common mode inductor unit into direct current. The constant voltage drive circuit module is used to adjust the voltage of the direct current output by the rectifier bridge unit to a constant voltage. The flyback module is used to transform the constant voltage output by the constant voltage drive circuit module. The secondary rectifier module is used to perform secondary filtering on the transformed constant voltage direct current output by the flyback module, and transmit the filtered direct current to the external LED lamp.

2. The driving circuit of the LED lamp according to claim 1, characterized in that: The rectification and filtering module also includes an AC input interface CON1, a resistor F1, a resistor R16, a capacitor C1, a capacitor CX1, an inductor L4 and a ground terminal GND. The input end of the first differential common mode inductor unit LF3 is connected to the AC input interface CON1 through the resistor F1, and the two ends of the capacitor CX1 are respectively connected to the two output ends of the first differential common mode inductor unit LF3. The output end of the first differential common mode inductor unit LF3 is respectively connected to the input end of the rectifier bridge unit DB1 through the resistor R16 and the inductor L4, and the two ends of the capacitor C1 are respectively connected to the two output ends of the rectifier bridge unit DB1.

3. The driving circuit of the LED lamp according to claim 2, characterized in that: The driving circuit also includes a signal input module for receiving external digital signals, the signal input module includes an interface DA1, an interface DA2, an adjustable metal resistor MOV1, an adjustable metal resistor MOV2 and a resistor F2, the adjustable metal resistor MOV1 and the adjustable metal resistor MOV2 are connected in parallel between the interface DA1 and the interface DA2, the interface DA1 is connected to the AC power input interface CON1, and the interface DA2 is connected to the AC power input interface CON1 through the resistor F2.

4. The driving circuit of the LED lamp according to claim 2, characterized in that: The constant voltage drive circuit module includes a constant voltage drive chip U1, a resistor R8, a resistor R9, a resistor R10, a resistor R22, a resistor R27, a resistor R28, a resistor R36, a resistor R38, a resistor R50, a capacitor C6, a capacitor C7, a capacitor C17, a capacitor C22, a diode D1, a diode D6, a diode D10 and a ground terminal GND. Pin 1 of the constant voltage drive chip U1 is connected to the output end of the rectifier bridge unit DB1 through resistors R28, R38 and R36, pin 2 is connected to the ground terminal GND through capacitor C7, pin 3 is connected to the ground terminal GND, and pin 4 is connected to the ground terminal GND through capacitor C6. The ground terminal GND is connected, pin 4 is connected to the flyback module through a resistor R22 and a diode D6, pin 4 is connected to the output end of the rectifier bridge unit DB1 through a diode D10, a resistor R38 and a resistor R36, pin 5 is connected to the flyback module through a diode D1, pin 6 is connected to pin 5, pin 6 is connected to pin 7 through a capacitor C17, and pin 7 is connected to the ground terminal GND through resistors R8 and R9 respectively, capacitor C22 and resistor R50 are connected in parallel between pin 1 of the constant voltage drive chip U1 and the ground terminal GND, and resistors R10 and R27 are connected in series between pin 2 of the constant voltage drive chip U1 and the ground terminal GND.

5. The driving circuit of the LED lamp according to claim 4, characterized in that: The model of the constant voltage driver chip U1 is BP2636C.

6. The driving circuit of the LED lamp according to claim 4, characterized in that: The flyback module includes an LED driver chip U4, a transformer T1-A, a resistor R1, a resistor R3, a resistor R6, a resistor R11, a resistor R12, a resistor R14, a resistor R18, a capacitor C4, a capacitor C10, a capacitor C11, a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16, a capacitor C19, a diode D4 and a diode D9. Pin 1 of the LED driver chip U4 is connected to the ground terminal GND through capacitors C14 and C15, respectively, pin 1 is connected to the constant voltage drive circuit module through diode D9, and pin 2 is connected to the ground terminal GND through capacitors C13 and resistor R14, respectively. The ground terminal GND is connected, pin 3 is connected to the ground terminal GND through capacitor C11, pin 4 is connected to the ground terminal GND through resistor R18 and capacitor C16, pin 5 is connected to the ground terminal GND, pin 6 is connected to the ground terminal GND through R11 and R12, pin 6 is connected to pin 7 through capacitor C19, pin 7 is connected to the input end of the transformer T1-A, pin 7 is connected to the constant voltage drive circuit module through diode D4, resistor R1 and resistor R3, the resistor R6 and capacitor C10 are connected in parallel between the resistor R1 and the input end of the transformer T1-A, and the capacitor C4 is connected in parallel with the diode D4.

7. The driving circuit of the LED lamp according to claim 6, characterized in that: The model of the LED driver chip U4 is BP3177DG.

8. The driving circuit of the LED lamp according to claim 6, characterized in that: The secondary rectification and filtering module includes a second differential common mode inductor unit LF2, an output interface CONS1, a resistor RS1, a resistor RS2, a capacitor C8, a capacitor CS1, a capacitor CS2, a capacitor CY1 and a diode DS1. Pin 1 of the second differential common mode inductor unit LF2 is connected to the output end of the transformer T1-A, pins 2 and 3 are connected to the output interface CONS1, and pin 4 is connected to the output end of the transformer T1-A through a diode DS1. The resistor RS1 and the capacitor CS1 are connected in series and then connected in parallel with the diode DS1. The resistor RS2 and the capacitor CS2 are connected in parallel between pin 1 and pin 4 of the second differential common mode inductor unit LF2. One end of the capacitor CY1 is connected to pin 4 of the second differential common mode inductor unit LF2, and the other end is connected to the ground terminal GND. The two ends of the capacitor C8 are respectively connected to pin 2 and pin 3 of the second differential common mode inductor unit LF2. The output interface CONS1 is used to be connected to an external LED lamp.

9. The driving circuit of the LED lamp according to claim 8, characterized in that: The drive circuit also includes a standby power supply module, which includes a power chip U2, a resistor R7, a resistor R17, a resistor R20, a capacitor C18, a capacitor C20, a polar capacitor CS3, an inductor L5, a diode D11, a diode D12 and a ground terminal GND. Pin 1 and pin 2 of the power chip U2 are connected and then connected to pin 5 through resistor R17. Pin 3 is connected to the flyback module through diode D12. Pin 4 is connected to the constant voltage drive circuit module. Pin 5 is connected to inductor L5 through resistor R17. The capacitor C18 and the diode D11 are connected in series between pin 3 of the power chip U2 and the ground terminal GND. The resistor R7, the resistor R20 and the capacitor C20 are connected in series between pin 3 of the power chip U2 and the ground terminal GND. The diode D12 and the polar capacitor CS3 are connected in series between pin 3 of the power chip U2 and the ground terminal GND.

10. A driver for an LED lamp, characterized in that: The driver comprises the driving circuit of the LED lamp according to any one of claims 1 to 9.

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