Ultrahigh frequency gallium nitride LED driving power supply

Abstract

The utility model relates to an ultrahigh frequency gallium nitride LED driving power supply which comprises an AC input and EMC circuit, a PFC and LLC control circuit, an auxiliary power supply circuit, an output synchronous rectification circuit and an output loop control circuit. The input end of the AC input and EMC circuit is connected with a power supply, the output end of the AC input and EMC circuit is connected with the input end of the PFC and LLC control circuit, the output end of the PFC and LLC control circuit is connected with the input end of the output synchronous rectification circuit, and the output end of the output synchronous rectification circuit outputs power supply voltage. The auxiliary power supply circuit and the output loop control circuit are connected with the PFC and LLC control circuit, the circuit topology is Boost PFC + LLC half-bridge two-stage to obtain high efficiency, low output ripple and no stroboflash, the size can be obviously reduced, the efficiency can be improved, the heat dissipation requirement can be reduced, and the high-power LED power supply circuit is very suitable for being applied to a high-power LED power supply.

Description

Technical Field

[0001] The utility model discloses an LED driving power supply, belongs to the technical field of LED power supplies, and specifically relates to an ultra-high frequency gallium nitride LED driving power supply. Background Art

[0002] High-power LED power supplies are usually used to drive LED lights that require higher power, such as outdoor lighting, industrial lighting, etc. This type of LED power supply usually needs to have the following features:

[0003] High efficiency: In order to reduce energy loss, high-power LED power supplies need to have high efficiency, which can be achieved by selecting efficient electronic components and designing reasonable circuits.

[0004] Stability: LED has strict requirements on voltage and current, so high-power LED power supply needs to have stable output voltage and current to ensure the normal operation of LED.

[0005] Protection function: In order to protect the LED and the power supply itself, high-power LED power supplies usually have built-in over-current protection, over-voltage protection, over-heat protection and other functions.

[0006] Good heat dissipation performance: Since high-power LED power supplies will generate a certain amount of heat during operation, they need to have good heat dissipation performance to ensure that the power supply works stably and reliably.

[0007] When choosing a high-power LED power supply, it is necessary to determine the output power, input voltage range, operating temperature range and other parameters according to actual needs, and ensure that the selected power supply meets the relevant safety certification standards to ensure safe and reliable use. At present, with the increasing popularity of LED lighting, the disadvantages of traditional power supplies are becoming more and more serious. Large size and temperature rise can no longer meet the higher requirements of high-end lighting design.

[0008] The development of GaN technology is not only widely used in fast charging, but also in LED lighting. GaN switch tube LED power supply can work stably and reliably at high frequency, 100kHz-1MHz significantly reduces the volume, has low on-resistance, can improve efficiency, reduce heat dissipation requirements, and is very suitable for high-power LED power supply applications, as well as products that need to be miniaturized, such as cabinet light driver power supply with height restrictions.

[0009] The extensive use of gallium nitride (GaN) in LED drivers has brought the advantages of GaN technology's small size and high efficiency to LED lighting. The use of gallium nitride (GaN) in high-power LED power supplies can reduce power loss and cooling requirements, making the already energy-saving LED lighting even more environmentally friendly.

[0010] However, the gallium nitride LED driving power supply in the prior art uses a single-stage circuit during operation, and thus a large power frequency ripple may occur in the output voltage, which may affect the health of human eyes. Utility Model Content

[0011] Purpose of the utility model: to provide an ultra-high frequency gallium nitride LED driver power supply to solve the above-mentioned problems.

[0012] Technical solution: An ultra-high frequency gallium nitride LED driver power supply, the LED driver power supply comprising: AC input and EMC circuit, PFC plus LLC control circuit, auxiliary power supply circuit, output synchronous rectification circuit and output loop control circuit;

[0013] The input end of the AC input and EMC circuit is connected to the power supply, and the output end is connected to the input end of the PFC plus LLC control circuit. The output end of the PFC plus LLC control circuit is connected to the input end of the output synchronous rectification circuit. The output end of the output synchronous rectification circuit outputs the power supply voltage. The auxiliary power supply circuit and the output loop control circuit are connected to the PFC plus LLC control circuit.

[0014] In a further embodiment, the PFC plus LLC control circuit includes: a PFC and LLC drive control chip U1, a resistor BC1, a resistor BC2, a diode rectifier D2, a capacitor C1, a polar capacitor EC1, a polar capacitor EC2, a gallium nitride MOS tube Q2, a voltage regulator ZD1, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a capacitor C3, a diode D7, a resistor R2, a resistor R3, a resistor R4, a diode D4, a voltage regulator diode Z1, a diode D5, a diode D6, a resistor R1, a diode D3, a gallium nitride MOS tube Q1, a capacitor C2, a resistor R9, Resistor R10, resistor R13, diode D9, Zener diode Z2, diode D10, diode D11, resistor R11, diode D8, gallium nitride MOS tube Q3, capacitor C8, capacitor C6, capacitor C7, magnetic core T2C, resistor RS1, resistor RS2, resistor R22, capacitor C11, resistor R33, capacitor C14, resistor R15, resistor R16, resistor R17, capacitor C10, resistor R29, diode D14, capacitor C15, capacitor C16, polarity capacitor EC7, resistor R36, resistor R40, resistor R43, resistor R44, inductor L2;

[0015] One end of the resistor BC1 is connected to one end of the resistor BC2 and one end of the resistor R33 at the same time, and one end of the resistor BC2 is connected to the output end of the AC input and EMC circuit, the other end of the resistor BC1 is connected to the A1 end and the A2 end of the diode rectifier D2, the output end of the diode rectifier D2 is connected to one end of the capacitor C1, the positive electrode of the polar capacitor EC1, the positive electrode of the polar capacitor EC2, the D electrode of the gallium nitride MOS tube Q1 and the negative electrode of the diode D3 at the same time, the positive electrode of the polar capacitor EC1 is connected to the output end of the AC input and EMC circuit, and the D electrode of the gallium nitride MOS tube Q2 is connected to the other end of the resistor BC2 The G poles of the two ends of the gallium nitride MOS tube Q2 are simultaneously connected to the negative pole of the voltage regulator tube ZD1, one end of the resistor R7, one end of the capacitor C3 and one end of the resistor R6. The other end of the resistor R6 is simultaneously connected to one end of the resistor R5, one end of the resistor R8 and the other end of the capacitor C3. The positive pole of the diode D7 is connected to the other end of the resistor R8. The S pole of the gallium nitride MOS tube Q2 is simultaneously connected to the other end of the resistor R7 and the positive pole of the voltage regulator tube ZD1 and is grounded, and is simultaneously connected to the other end of the capacitor C1, the negative pole of the polar capacitor EC1, the negative pole of the polar capacitor EC2, one end of the resistor RS1 and one end of the resistor RS2. One end of the resistor RS2 is grounded, the other end of the capacitor C1 and the negative electrode of the polar capacitor EC1 are grounded, the other end of the resistor RS1 and the other end of the resistor RS2 are connected to one end of the resistor R22 and are grounded, the G pole of the gallium nitride MOS tube Q1 is simultaneously connected to one end of the resistor R1, the negative electrode of the voltage regulator tube Z1, one end of the resistor R3 and one end of the capacitor C2, the S pole of the gallium nitride MOS tube Q1 is simultaneously connected to the positive electrode of the diode D3, one end of the inductor L2, the D pole of the gallium nitride MOS tube Q3, the negative electrode of the diode D8, the other end of the resistor R1, the positive electrode of the diode D6 and the negative electrode of the diode D5, the voltage regulator tube The positive electrode of Z1 is simultaneously connected to the positive electrode of the diode D5 and the negative electrode of the diode D6, the other end of the resistor R3 is simultaneously connected to one end of the resistor R2, one end of the resistor R4 and the other end of the capacitor C2, the positive electrode of the diode D4 is connected to the other end of the resistor R4, the G electrode of the gallium nitride MOS tube Q3 is simultaneously connected to one end of the resistor R11, the negative electrode of the voltage regulator tube Z2, one end of the resistor R10 and one end of the capacitor C8, the S electrode of the gallium nitride MOS tube Q3 is simultaneously connected to the positive electrode of the diode D8, the other end of the resistor R11, the positive electrode of the diode D11, the negative electrode of the diode D10 and one end of the capacitor C5 and is grounded,One end of the magnetic core T2C is connected to the other end of the inductor L2, and the other end is connected to the other end of the capacitor C6 and one end of the capacitor C7. The positive electrode of the voltage regulator Z2 is connected to the positive electrode of the diode D10 and the negative electrode of the diode D11. The other end of the resistor R10 is connected to one end of the resistor R9, one end of the resistor R13 and the other end of the capacitor C8. The positive electrode of the diode D9 is connected to the other end of the resistor R13. The other end of the capacitor C7 is connected to one end of the resistor R15, one end of the resistor R16 and one end of the resistor R17. The other end of the resistor R15 is connected to the other end of the resistor R16 and one end of the capacitor C10. The first end of the PFC and LLC drive control chip U1 is connected to the other end of the resistor R2 and the cathode of the diode D4, the first end of the PFC and LLC drive control chip U1 is connected to one end of the capacitor C15, the third end of the PFC and LLC drive control chip U1 is connected to the other end of the capacitor C15 and one end of the resistor R29, the other end of the resistor R29 is connected to the cathode of the diode D14, the fifth end of the PFC and LLC drive control chip U1 inputs the voltage VCC, and is connected to the anode of the diode D14, one end of the capacitor C16 and the cathode of the polar capacitor EC7, the cathode of the capacitor C16 is connected to the cathode of the diode D14 ... The other end and the negative electrode of the polarity capacitor EC7 are grounded, the No. 6 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the other end of the resistor R17 and one end of the capacitor C10, the No. 10 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the other end of the resistor R22 and one end of the capacitor C11, the No. 11 pin of the PFC and LLC drive control chip U1 is connected to one end of the capacitor C14, the other end of the capacitor C11 is connected to the other end of the capacitor C14 is grounded, the No. 12 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 13 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 14 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 15 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 16 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 17 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 18 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 19 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 20 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor Pin 13 of the chip U1 is grounded, Pin 14 of the PFC and LLC drive control chip U1 is simultaneously connected to the other end of the resistor R9 and the negative electrode of the diode D9, Pin 16 of the PFC and LLC drive control chip U1 is connected to one end of the resistor R33, the other end of the resistor R33 is connected to one end of the resistor BC1, one end of the resistor R26 is connected to one end of the polar capacitor EC2, and the other end is connected to one end of the resistor R40, one end of the resistor R43 is connected to the other end of the resistor R40, and the other end is simultaneously connected to one end of the resistor R44 and Pin 11 of the PFC and LLC drive control chip U1, and the other end of the resistor R44 is grounded.

[0016] In a further embodiment, the model of the PFC and LLC drive control chip U1 is SY5955.

[0017] In a further embodiment, the AC input and EMC circuit includes: interface CN2, fuse F1, varistor MOV2, resistor R31, resistor R34, resistor R35, capacitor C19, resistor R26, resistor R27, diode D12, diode D13, common mode inductor LF3, resistor RX1, resistor RX3, resistor RX2, resistor RX4, thermistor RT1, capacitor CX2, capacitor CY4, capacitor CY3, resistor BC3, resistor BC4, common mode inductor LF2, varistor MOV1, capacitor CX1, rectifier bridge BD1, capacitor CB2, capacitor CB1, diode D1, iron core inductor L1, iron core inductor T1;

[0018] Pin 1 of the interface CN2 is connected to the ground, pin 3 is connected to one end of the varistor MOV2 and pin 2 of the common-mode inductor LF3, pin 5 is connected to one end of the fuse F1, the other end of the fuse F1 is connected to pin 1 of the common-mode inductor LF3 and the other end of the varistor MOV2, pin 3 of the common-mode inductor LF3 is connected to the positive electrode of the diode D12 and one end of the thermistor RT1, the negative electrode of the diode D12 is connected to one end of the resistor R26, pin 4 of the common-mode inductor LF3 is connected to the positive electrode of the diode D13, one end of the capacitor CX2, one end of the resistor RX1, and the positive electrode of the diode D13. One end of the resistor RX3, one end of the capacitor CY3 and pin 1 of the common-mode inductor LF2 are connected, the cathode of the diode D13 is connected to one end of the resistor R27, one end of the resistor R31 is simultaneously connected to the other end of the resistor R26 and the other end of the resistor R27, and the other end is connected to one end of the resistor R34, the other end of the resistor R34 is simultaneously connected to one end of the resistor R35 and one end of the capacitor C19 and is connected to pin 9 of the PFC and LLC drive control chip U1, the other end of the resistor R35 and the other end of the capacitor C19 are grounded, the other end of the thermistor RT1 is simultaneously connected to the other end of the capacitor CX2, the resistor RX 2, one end of the resistor RX4, one end of the capacitor CY4 and pin 2 of the common-mode inductor LF2, the other end of the resistor RX1 is simultaneously connected to the other end of the resistor RX2, the other end of the resistor RX3 and the other end of the resistor RX4, the other end of the capacitor CY3 is connected to one end of the resistor BC3, the other end of the capacitor CY4 is connected to one end of the resistor BC4, the other end of the resistor BC3 is connected to the other end of the resistor BC4 and is grounded, pin 4 of the common-mode inductor LF2 is simultaneously connected to one end of the varistor MOV1, one end of the capacitor CX1 and pin 3 of the rectifier BD1, the common-mode inductor LF2 Pin 3 of is simultaneously connected to the other end of the varistor MOV1, the other end of the capacitor CX1 and pin 2 of the rectifier BD1, pin 4 of the rectifier BD1 is grounded, pin 1 of the rectifier BD1 is simultaneously connected to one end of the capacitor CB2 and pin 2 of the core inductor L1, the other end of the capacitor CB2 is grounded, pin 1 of the core inductor L1 is simultaneously connected to one end of the capacitor CB1, pin 3 of the core inductor T1 and the positive electrode of the diode D1, the other end of the capacitor CB1 is grounded, the other end of the core inductor T1 is connected to one end of the resistor CB2, and the negative electrode of the diode D1 is connected to the positive electrode of the polarity capacitor EC1.

[0019] In a further embodiment, the output synchronous rectification circuit includes: a magnetic core T2A, a magnetic core T2B, a polar capacitor EC3, a polar capacitor EC6, a polar capacitor EC4, a polar capacitor EC5, a capacitor C5, a resistor R14, a voltage regulator ZD2, a resistor R21, a capacitor C13, a MOS tube Q4, a resistor R23, a resistor R18, a capacitor C9, a resistor R19, a resistor R24, a MOS tube Q5, a resistor R20, a capacitor C12, a common mode inductor LF1, a resistor B1, a resistor B2, a capacitor C4, a capacitor CY1, a capacitor CY2, a resistor R12, an interface CN1, and a synchronous rectification controller U2;

[0020] Pin No. 9 of the magnetic core T2A is connected to pin No. 10 of the magnetic core T2B and is also connected to the positive electrode of the polar capacitor EC3, one end of the resistor R14, the positive electrode of the polar capacitor EC4, the positive electrode of the polar capacitor EC5, the positive electrode of the polar capacitor EC6, one end of the capacitor C5 and pin No. 2 of the common-mode inductor LF1. Pin No. 1 of the common-mode inductor LF1 is also connected to the negative electrode of the polar capacitor EC3, the negative electrode of the polar capacitor EC4, the negative electrode of the polar capacitor EC5, the negative electrode of the polar capacitor EC6 and the other end of the capacitor C5 and is grounded. One end of the capacitor C5 is input with voltage VOUT, the negative electrode of the polar capacitor EC4 is grounded, and the magnetic core T2 Pin No. 11 and Pin No. 12 of A are simultaneously connected to one end of the resistor R24, the D pole of the MOS tube Q5 and one end of the resistor R20, Pin No. 7 and Pin No. 8 of the magnetic core T2B are simultaneously connected to one end of the resistor R21, the D pole of the MOS tube Q4 and one end of the resistor R23, the other end of the resistor R21 is connected to one end of the capacitor C13, the G pole of the MOS tube Q4 is connected to one end of the resistor R18, the other end of the resistor R14 is connected to the negative pole of the voltage regulator tube ZD2, the other end of the resistor R20 is connected to one end of the capacitor C12, the G pole of the MOS tube Q5 is connected to one end of the resistor R19, and Pin No. 1 of the synchronous rectification controller U2 is connected to the negative pole of the MOS tube Q5. The pin No. 2 of the synchronous rectifier controller U2 is connected to the other end of the resistor R19, the pin No. 2 of the synchronous rectifier controller U2 is connected to one end of the capacitor C9 and grounded, the pin No. 3 of the synchronous rectifier controller U2 is connected to the other end of the resistor R24, the pin No. 4 of the synchronous rectifier controller U2 is simultaneously connected to the S pole of the MOS tube Q5 and the other end of the capacitor C12 and grounded, the pin No. 5 of the synchronous rectifier controller U2 is simultaneously connected to the S pole of the MOS tube Q4 and the other end of the capacitor C13 and grounded, the pin No. 6 of the synchronous rectifier controller U2 is connected to the other end of the resistor R23, and the pin No. 7 of the synchronous rectifier controller U2 is simultaneously connected to the positive electrode of the voltage regulator tube ZD2 and the other end of the capacitor C9 One end is connected, pin 8 of the synchronous rectification controller U2 is connected to the other end of the resistor R18, pin 3 of the common-mode inductor LF1 is simultaneously connected to one end of the resistor B1, one end of the capacitor C4, one end of the resistor R12, and pins 4 and 5 of the interface CN1, one end of the resistor R12 outputs a voltage VOUT1, the other end of the resistor B1 is connected to one end of the capacitor CY1, and the other end of the capacitor CY1 is connected to the ground, pin 4 of the common-mode inductor LF1 is simultaneously connected to one end of the resistor B2, the other end of the capacitor C4, the other end of the resistor R12, and pins 1 and 2 of the interface CN1, and one end of the resistor R12 is grounded,The other end of the resistor B2 is connected to one end of the capacitor CY2, and the other end of the capacitor CY2 is connected to the ground.

[0021] In a further embodiment, the auxiliary power supply circuit includes: a diode D15, a resistor R25, a resistor R28, a resistor R30, a resistor R32, a capacitor C18, a capacitor C17, and a magnetic core T2D;

[0022] The cathode of the diode D15 is connected to the anode of the polarity capacitor EC7, and the anode is also connected to one end of the resistor R25 and one end of the resistor R28. Pin 3 of the magnetic core T2D is also connected to the other end of the resistor R58, the other end of the resistor R28, one end of the resistor R30 and one end of the capacitor C17. Pin 5 of the magnetic core T2D is grounded. The other end of the resistor R30 is also connected to one end of the resistor R32, one end of the capacitor C18 and pin 7 of the PFC and LLC drive control chip U1. The other end of the capacitor C17 is also connected to the other end of the resistor R32 and the other end of the capacitor C18 and is grounded.

[0023] In a further embodiment, the output loop control circuit includes: resistor R38, capacitor C21, optocoupler U3, resistor R37, resistor R41, resistor R39, capacitor C20, capacitor C22, capacitor C23, resistor R42, resistor R45, resistor R46, voltage regulator transistor U4, capacitor CY5, resistor BC5, capacitor CY6, resistor BC6;

[0024] One end of the resistor R38 is connected to pin 8 of the PFC and LLC drive control chip U1, and the other end is connected to one end of the capacitor C21 and pin 1 of the optocoupler U3. Pin 2 of the optocoupler U3 is connected to the other end of the capacitor C21 and grounded. Pin 3 of the optocoupler U3 is connected to one end of the resistor R37 and one end of the resistor R41. Pin 4 of the optocoupler U3 is connected to the other end of the resistor R41, one end of the capacitor C22, one end of the capacitor C23 and pin 3 of the voltage-stabilizing transistor U4. One end of the resistor R39 is connected to the other end of the resistor R37 and one end of the capacitor C20 and outputs the voltage VOUT. The other end of the capacitor C20 is connected to the public A common end, the other end of the resistor R39 is simultaneously connected to one end of the resistor R44, the other end of the capacitor C23, one end of the resistor R46, one end of the resistor R45 and pin No. 2 of the voltage-regulating transistor U4, the other end of the capacitor C22 is connected to the other end of the resistor R44, the other end of the resistor R45 is simultaneously connected to the other end of the resistor R46 and pin No. 1 of the voltage-regulating transistor U4, one end of the capacitor CY5 is connected to one end of the resistor BC5, one end of the capacitor CY6 is connected to one end of the resistor BC6, the other end of the capacitor CY5 is grounded, the other end of the resistor BC5 is grounded, the other end of the capacitor CY6 is connected to the positive electrode of the polarity capacitor EC2, and the other end of the resistor BC6 is grounded.

[0025] In a further embodiment, the model of the synchronous rectification controller U2 is WS2995.

[0026] In a further embodiment, the model of the optocoupler U3 is CT1019, and the model of the voltage regulator transistor is AZ431.

[0027] Beneficial effects: The utility model discloses an LED driver power supply, which belongs to the field of LED power supply technology, and specifically relates to an ultra-high frequency gallium nitride LED driver power supply. The circuit topology of the utility model is Boost PFC+LLC half-bridge two-stage to achieve high efficiency and low output ripple, and no flicker. The LED driver power supply of the utility model can increase the operating frequency, thereby reducing the volume of the system, making the LED driver power supply smaller and thinner. In a small space, gallium nitride has lower switching loss and lower on-resistance, which can improve the conversion efficiency of the LED power supply and reduce system heat generation, while achieving the benefits of energy conservation and emission reduction, helping to achieve carbon peak and carbon neutrality, and at the same time can significantly reduce the volume, improve efficiency, and reduce heat dissipation requirements, which is very suitable for high-power LED power supply applications.

[0028] In addition, the utility model has the advantage that when the output is used in an external PWM dimmer, excellent dimming performance is obtained. Due to the ultra-high operating frequency, the dynamic response performance of the LED driver power supply is improved, and it can better respond to the output load jump from no-load to full-load. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of an LED driving power supply of the utility model.

[0030] Figure 2 It is a schematic diagram of AC input and EMC circuit of the utility model.

[0031] Figure 3 This is a schematic diagram of a PFC plus LLC control circuit of the utility model.

[0032] Figure 4 It is a schematic diagram of an output synchronous rectification circuit of the utility model.

[0033] Figure 5 It is a schematic diagram of the output loop control circuit of the utility model.

[0034] Figure 6 This is a schematic diagram of the auxiliary power supply circuit of the utility model. DETAILED DESCRIPTION

[0035] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0038] An ultra-high frequency gallium nitride LED driver power supply, such as Figure 1 As shown, it includes: AC input and EMC circuit, PFC plus LLC control circuit, auxiliary power supply circuit, output synchronous rectification circuit and output loop control circuit;

[0039] The input end of the AC input and EMC circuit is connected to the power supply, and the output end is connected to the input end of the PFC plus LLC control circuit. The output end of the PFC plus LLC control circuit is connected to the input end of the output synchronous rectification circuit. The output end of the output synchronous rectification circuit outputs the power supply voltage. The auxiliary power supply circuit and the output loop control circuit are connected to the PFC plus LLC control circuit.

[0040] In one embodiment, Figure 3 As shown, the PFC plus LLC control circuit includes: a PFC and LLC drive control chip U1, a resistor BC1, a resistor BC2, a diode rectifier D2, a capacitor C1, a polar capacitor EC1, a polar capacitor EC2, a gallium nitride MOS tube Q2, a voltage regulator ZD1, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a capacitor C3, a diode D7, a resistor R2, a resistor R3, a resistor R4, a diode D4, a voltage regulator diode Z1, a diode D5, a diode D6, a resistor R1, a diode D3, a gallium nitride MOS tube Q1, a capacitor C2, a resistor R9, and a resistor R1 0, resistor R13, diode D9, Zener diode Z2, diode D10, diode D11, resistor R11, diode D8, gallium nitride MOS tube Q3, capacitor C8, capacitor C6, capacitor C7, magnetic core T2C, resistor RS1, resistor RS2, resistor R22, capacitor C11, resistor R33, capacitor C14, resistor R15, resistor R16, resistor R17, capacitor C10, resistor R29, diode D14, capacitor C15, capacitor C16, polarity capacitor EC7, resistor R36, resistor R40, resistor R43, resistor R44, inductor L2;

[0041] One end of the resistor BC1 is connected to one end of the resistor BC2 and one end of the resistor R33 at the same time, and one end of the resistor BC2 is connected to the output end of the AC input and EMC circuit, the other end of the resistor BC1 is connected to the A1 end and the A2 end of the diode rectifier D2, the output end of the diode rectifier D2 is connected to one end of the capacitor C1, the positive electrode of the polar capacitor EC1, the positive electrode of the polar capacitor EC2, the D electrode of the gallium nitride MOS tube Q1 and the negative electrode of the diode D3 at the same time, the positive electrode of the polar capacitor EC1 is connected to the output end of the AC input and EMC circuit, and the D electrode of the gallium nitride MOS tube Q2 is connected to the other end of the resistor BC2 The G poles of the two ends of the gallium nitride MOS tube Q2 are simultaneously connected to the negative pole of the voltage regulator tube ZD1, one end of the resistor R7, one end of the capacitor C3 and one end of the resistor R6. The other end of the resistor R6 is simultaneously connected to one end of the resistor R5, one end of the resistor R8 and the other end of the capacitor C3. The positive pole of the diode D7 is connected to the other end of the resistor R8. The S pole of the gallium nitride MOS tube Q2 is simultaneously connected to the other end of the resistor R7 and the positive pole of the voltage regulator tube ZD1 and is grounded, and is simultaneously connected to the other end of the capacitor C1, the negative pole of the polar capacitor EC1, the negative pole of the polar capacitor EC2, one end of the resistor RS1 and one end of the resistor RS2. One end of the resistor RS2 is grounded, the other end of the capacitor C1 and the negative electrode of the polar capacitor EC1 are grounded, the other end of the resistor RS1 and the other end of the resistor RS2 are connected to one end of the resistor R22 and are grounded, the G pole of the gallium nitride MOS tube Q1 is simultaneously connected to one end of the resistor R1, the negative electrode of the voltage regulator tube Z1, one end of the resistor R3 and one end of the capacitor C2, the S pole of the gallium nitride MOS tube Q1 is simultaneously connected to the positive electrode of the diode D3, one end of the inductor L2, the D pole of the gallium nitride MOS tube Q3, the negative electrode of the diode D8, the other end of the resistor R1, the positive electrode of the diode D6 and the negative electrode of the diode D5, the voltage regulator tube The positive electrode of Z1 is simultaneously connected to the positive electrode of the diode D5 and the negative electrode of the diode D6, the other end of the resistor R3 is simultaneously connected to one end of the resistor R2, one end of the resistor R4 and the other end of the capacitor C2, the positive electrode of the diode D4 is connected to the other end of the resistor R4, the G electrode of the gallium nitride MOS tube Q3 is simultaneously connected to one end of the resistor R11, the negative electrode of the voltage regulator tube Z2, one end of the resistor R10 and one end of the capacitor C8, the S electrode of the gallium nitride MOS tube Q3 is simultaneously connected to the positive electrode of the diode D8, the other end of the resistor R11, the positive electrode of the diode D11, the negative electrode of the diode D10 and one end of the capacitor C5 and is grounded,One end of the magnetic core T2C is connected to the other end of the inductor L2, and the other end is connected to the other end of the capacitor C6 and one end of the capacitor C7. The positive electrode of the voltage regulator Z2 is connected to the positive electrode of the diode D10 and the negative electrode of the diode D11. The other end of the resistor R10 is connected to one end of the resistor R9, one end of the resistor R13 and the other end of the capacitor C8. The positive electrode of the diode D9 is connected to the other end of the resistor R13. The other end of the capacitor C7 is connected to one end of the resistor R15, one end of the resistor R16 and one end of the resistor R17. The other end of the resistor R15 is connected to the other end of the resistor R16 and one end of the capacitor C10. The first end of the PFC and LLC drive control chip U1 is connected to the other end of the resistor R2 and the cathode of the diode D4, the first end of the PFC and LLC drive control chip U1 is connected to one end of the capacitor C15, the third end of the PFC and LLC drive control chip U1 is connected to the other end of the capacitor C15 and one end of the resistor R29, the other end of the resistor R29 is connected to the cathode of the diode D14, the fifth end of the PFC and LLC drive control chip U1 inputs the voltage VCC, and is connected to the anode of the diode D14, one end of the capacitor C16 and the cathode of the polar capacitor EC7, the cathode of the capacitor C16 is connected to the cathode of the diode D14 ... The other end and the negative electrode of the polarity capacitor EC7 are grounded, the No. 6 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the other end of the resistor R17 and one end of the capacitor C10, the No. 10 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the other end of the resistor R22 and one end of the capacitor C11, the No. 11 pin of the PFC and LLC drive control chip U1 is connected to one end of the capacitor C14, the other end of the capacitor C11 is connected to the other end of the capacitor C14 is grounded, the No. 12 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 13 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 14 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 15 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 16 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 17 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 18 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 19 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 20 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor Pin 13 of the chip U1 is grounded, Pin 14 of the PFC and LLC drive control chip U1 is simultaneously connected to the other end of the resistor R9 and the negative electrode of the diode D9, Pin 16 of the PFC and LLC drive control chip U1 is connected to one end of the resistor R33, the other end of the resistor R33 is connected to one end of the resistor BC1, one end of the resistor R26 is connected to one end of the polar capacitor EC2, and the other end is connected to one end of the resistor R40, one end of the resistor R43 is connected to the other end of the resistor R40, and the other end is simultaneously connected to one end of the resistor R44 and Pin 11 of the PFC and LLC drive control chip U1, and the other end of the resistor R44 is grounded.

[0042] In one embodiment, Figure 3 As shown, the model of the PFC and LLC drive control chip U1 is SY5955.

[0043] In one embodiment, Figure 2 As shown, the AC input and EMC circuit includes: interface CN2, fuse F1, varistor MOV2, resistor R31, resistor R34, resistor R35, capacitor C19, resistor R26, resistor R27, diode D12, diode D13, common mode inductor LF3, resistor RX1, resistor RX3, resistor RX2, resistor RX4, thermistor RT1, capacitor CX2, capacitor CY4, capacitor CY3, resistor BC3, resistor BC4, common mode inductor LF2, varistor MOV1, capacitor CX1, rectifier bridge BD1, capacitor CB2, capacitor CB1, diode D1, iron core inductor L1, iron core inductor T1;

[0044] Pin 1 of the interface CN2 is connected to the ground, pin 3 is connected to one end of the varistor MOV2 and pin 2 of the common-mode inductor LF3, pin 5 is connected to one end of the fuse F1, the other end of the fuse F1 is connected to pin 1 of the common-mode inductor LF3 and the other end of the varistor MOV2, pin 3 of the common-mode inductor LF3 is connected to the positive electrode of the diode D12 and one end of the thermistor RT1, the negative electrode of the diode D12 is connected to one end of the resistor R26, pin 4 of the common-mode inductor LF3 is connected to the positive electrode of the diode D13, one end of the capacitor CX2, one end of the resistor RX1, and the positive electrode of the diode D13. One end of the resistor RX3, one end of the capacitor CY3 and pin 1 of the common-mode inductor LF2 are connected, the cathode of the diode D13 is connected to one end of the resistor R27, one end of the resistor R31 is simultaneously connected to the other end of the resistor R26 and the other end of the resistor R27, and the other end is connected to one end of the resistor R34, the other end of the resistor R34 is simultaneously connected to one end of the resistor R35 and one end of the capacitor C19 and is connected to pin 9 of the PFC and LLC drive control chip U1, the other end of the resistor R35 and the other end of the capacitor C19 are grounded, the other end of the thermistor RT1 is simultaneously connected to the other end of the capacitor CX2, the resistor RX 2, one end of the resistor RX4, one end of the capacitor CY4 and pin 2 of the common-mode inductor LF2, the other end of the resistor RX1 is simultaneously connected to the other end of the resistor RX2, the other end of the resistor RX3 and the other end of the resistor RX4, the other end of the capacitor CY3 is connected to one end of the resistor BC3, the other end of the capacitor CY4 is connected to one end of the resistor BC4, the other end of the resistor BC3 is connected to the other end of the resistor BC4 and is grounded, pin 4 of the common-mode inductor LF2 is simultaneously connected to one end of the varistor MOV1, one end of the capacitor CX1 and pin 3 of the rectifier BD1, the common-mode inductor LF2 Pin 3 of is simultaneously connected to the other end of the varistor MOV1, the other end of the capacitor CX1 and pin 2 of the rectifier BD1, pin 4 of the rectifier BD1 is grounded, pin 1 of the rectifier BD1 is simultaneously connected to one end of the capacitor CB2 and pin 2 of the core inductor L1, the other end of the capacitor CB2 is grounded, pin 1 of the core inductor L1 is simultaneously connected to one end of the capacitor CB1, pin 3 of the core inductor T1 and the positive electrode of the diode D1, the other end of the capacitor CB1 is grounded, the other end of the core inductor T1 is connected to one end of the resistor CB2, and the negative electrode of the diode D1 is connected to the positive electrode of the polarity capacitor EC1.

[0045] In one embodiment, Figure 4 As shown, the output synchronous rectification circuit includes: a magnetic core T2A, a magnetic core T2B, a polar capacitor EC3, a polar capacitor EC6, a polar capacitor EC4, a polar capacitor EC5, a capacitor C5, a resistor R14, a voltage regulator ZD2, a resistor R21, a capacitor C13, a MOS tube Q4, a resistor R23, a resistor R18, a capacitor C9, a resistor R19, a resistor R24, a MOS tube Q5, a resistor R20, a capacitor C12, a common mode inductor LF1, a resistor B1, a resistor B2, a capacitor C4, a capacitor CY1, a capacitor CY2, a resistor R12, an interface CN1, and a synchronous rectification controller U2;

[0046] Pin No. 9 of the magnetic core T2A is connected to pin No. 10 of the magnetic core T2B and is also connected to the positive electrode of the polar capacitor EC3, one end of the resistor R14, the positive electrode of the polar capacitor EC4, the positive electrode of the polar capacitor EC5, the positive electrode of the polar capacitor EC6, one end of the capacitor C5 and pin No. 2 of the common-mode inductor LF1. Pin No. 1 of the common-mode inductor LF1 is also connected to the negative electrode of the polar capacitor EC3, the negative electrode of the polar capacitor EC4, the negative electrode of the polar capacitor EC5, the negative electrode of the polar capacitor EC6 and the other end of the capacitor C5 and is grounded. One end of the capacitor C5 is input with voltage VOUT, the negative electrode of the polar capacitor EC4 is grounded, and the magnetic core T2 Pin No. 11 and Pin No. 12 of A are simultaneously connected to one end of the resistor R24, the D pole of the MOS tube Q5 and one end of the resistor R20, Pin No. 7 and Pin No. 8 of the magnetic core T2B are simultaneously connected to one end of the resistor R21, the D pole of the MOS tube Q4 and one end of the resistor R23, the other end of the resistor R21 is connected to one end of the capacitor C13, the G pole of the MOS tube Q4 is connected to one end of the resistor R18, the other end of the resistor R14 is connected to the negative pole of the voltage regulator tube ZD2, the other end of the resistor R20 is connected to one end of the capacitor C12, the G pole of the MOS tube Q5 is connected to one end of the resistor R19, and Pin No. 1 of the synchronous rectification controller U2 is connected to the negative pole of the MOS tube Q5. The pin No. 2 of the synchronous rectifier controller U2 is connected to the other end of the resistor R19, the pin No. 2 of the synchronous rectifier controller U2 is connected to one end of the capacitor C9 and grounded, the pin No. 3 of the synchronous rectifier controller U2 is connected to the other end of the resistor R24, the pin No. 4 of the synchronous rectifier controller U2 is simultaneously connected to the S pole of the MOS tube Q5 and the other end of the capacitor C12 and grounded, the pin No. 5 of the synchronous rectifier controller U2 is simultaneously connected to the S pole of the MOS tube Q4 and the other end of the capacitor C13 and grounded, the pin No. 6 of the synchronous rectifier controller U2 is connected to the other end of the resistor R23, and the pin No. 7 of the synchronous rectifier controller U2 is simultaneously connected to the positive electrode of the voltage regulator tube ZD2 and the other end of the capacitor C9 One end is connected, pin 8 of the synchronous rectification controller U2 is connected to the other end of the resistor R18, pin 3 of the common-mode inductor LF1 is simultaneously connected to one end of the resistor B1, one end of the capacitor C4, one end of the resistor R12, and pins 4 and 5 of the interface CN1, one end of the resistor R12 outputs a voltage VOUT1, the other end of the resistor B1 is connected to one end of the capacitor CY1, and the other end of the capacitor CY1 is connected to the ground, pin 4 of the common-mode inductor LF1 is simultaneously connected to one end of the resistor B2, the other end of the capacitor C4, the other end of the resistor R12, and pins 1 and 2 of the interface CN1, and one end of the resistor R12 is grounded,The other end of the resistor B2 is connected to one end of the capacitor CY2, and the other end of the capacitor CY2 is connected to the ground.

[0047] In one embodiment, Figure 6 As shown, the auxiliary power supply circuit includes: a diode D15, a resistor R25, a resistor R28, a resistor R30, a resistor R32, a capacitor C18, a capacitor C17, and a magnetic core T2D;

[0048] The cathode of the diode D15 is connected to the anode of the polarity capacitor EC7, and the anode is also connected to one end of the resistor R25 and one end of the resistor R28. Pin 3 of the magnetic core T2D is also connected to the other end of the resistor R58, the other end of the resistor R28, one end of the resistor R30 and one end of the capacitor C17. Pin 5 of the magnetic core T2D is grounded. The other end of the resistor R30 is also connected to one end of the resistor R32, one end of the capacitor C18 and pin 7 of the PFC and LLC drive control chip U1. The other end of the capacitor C17 is also connected to the other end of the resistor R32 and the other end of the capacitor C18 and is grounded.

[0049] In one embodiment, Figure 5 As shown, the output loop control circuit includes: resistor R38, capacitor C21, optocoupler U3, resistor R37, resistor R41, resistor R39, capacitor C20, capacitor C22, capacitor C23, resistor R42, resistor R45, resistor R46, voltage regulator transistor U4, capacitor CY5, resistor BC5, capacitor CY6, resistor BC6;

[0050] One end of the resistor R38 is connected to pin 8 of the PFC and LLC drive control chip U1, and the other end is connected to one end of the capacitor C21 and pin 1 of the optocoupler U3. Pin 2 of the optocoupler U3 is connected to the other end of the capacitor C21 and grounded. Pin 3 of the optocoupler U3 is connected to one end of the resistor R37 and one end of the resistor R41. Pin 4 of the optocoupler U3 is connected to the other end of the resistor R41, one end of the capacitor C22, one end of the capacitor C23 and pin 3 of the voltage-stabilizing transistor U4. One end of the resistor R39 is connected to the other end of the resistor R37 and one end of the capacitor C20 and outputs the voltage VOUT. The other end of the capacitor C20 is connected to the public A common end, the other end of the resistor R39 is simultaneously connected to one end of the resistor R44, the other end of the capacitor C23, one end of the resistor R46, one end of the resistor R45 and pin No. 2 of the voltage-regulating transistor U4, the other end of the capacitor C22 is connected to the other end of the resistor R44, the other end of the resistor R45 is simultaneously connected to the other end of the resistor R46 and pin No. 1 of the voltage-regulating transistor U4, one end of the capacitor CY5 is connected to one end of the resistor BC5, one end of the capacitor CY6 is connected to one end of the resistor BC6, the other end of the capacitor CY5 is grounded, the other end of the resistor BC5 is grounded, the other end of the capacitor CY6 is connected to the positive electrode of the polarity capacitor EC2, and the other end of the resistor BC6 is grounded.

[0051] In one embodiment, the gallium nitride MOS tube Q2, gallium nitride MOS tube Q1 and gallium nitride MOS tube Q3 used in the PFC and LLC drive control chip U1 are used as switch tubes. The gallium nitride MOS tube Q2, gallium nitride MOS tube Q1 and gallium nitride MOS tube Q3 adopt the INN650D140A and INN650D240A of InnoGaN products, all of which use a compact (DFN8*8) package, and have the characteristics of small parasitic inductance, small parasitic capacitance, low driving charge, fast switching speed, etc., which not only facilitates the layout and thermal design of the power supply product, but also can significantly reduce the switching loss and driving loss of the power supply product.

[0052] The PFC and LLC drive control chip U1 uses Silergy's SY5955, a two-in-one chip that includes PFC and LLC drive control.

[0053] In one embodiment, the input voltage of the LED driver of the utility model is 180V-264V, the output voltage is 24V, the output current is 8.3A, and the power is 200W.

[0054] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. An ultra-high frequency gallium nitride LED driver power supply, characterized in that: The LED driving power supply includes: AC input and EMC circuit, PFC plus LLC control circuit, auxiliary power supply circuit, output synchronous rectification circuit and output loop control circuit; The input end of the AC input and EMC circuit is connected to the power supply, and the output end is connected to the input end of the PFC plus LLC control circuit. The output end of the PFC plus LLC control circuit is connected to the input end of the output synchronous rectification circuit. The output end of the output synchronous rectification circuit outputs the power supply voltage. The auxiliary power supply circuit and the output loop control circuit are connected to the PFC plus LLC control circuit.

2. The ultra-high frequency gallium nitride LED driving power supply according to claim 1, characterized in that: The PFC plus LLC control circuit includes: a PFC and LLC drive control chip U1, a resistor BC1, a resistor BC2, a diode rectifier D2, a capacitor C1, a polar capacitor EC1, a polar capacitor EC2, a gallium nitride MOS tube Q2, a voltage regulator ZD1, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a capacitor C3, a diode D7, a resistor R2, a resistor R3, a resistor R4, a diode D4, a voltage regulator diode Z1, a diode D5, a diode D6, a resistor R1, a diode D3, a gallium nitride MOS tube Q1, a capacitor C2, a resistor R9, and a resistor R10 , resistor R13, diode D9, Zener diode Z2, diode D10, diode D11, resistor R11, diode D8, gallium nitride MOS tube Q3, capacitor C8, capacitor C6, capacitor C7, magnetic core T2C, resistor RS1, resistor RS2, resistor R22, capacitor C11, resistor R33, capacitor C14, resistor R15, resistor R16, resistor R17, capacitor C10, resistor R29, diode D14, capacitor C15, capacitor C16, polarity capacitor EC7, resistor R36, resistor R40, resistor R43, resistor R44, inductor L2; One end of the resistor BC1 is connected to one end of the resistor BC2 and one end of the resistor R33 at the same time, and one end of the resistor BC2 is connected to the output end of the AC input and EMC circuit, the other end of the resistor BC1 is connected to the A1 end and the A2 end of the diode rectifier D2, the output end of the diode rectifier D2 is connected to one end of the capacitor C1, the positive electrode of the polar capacitor EC1, the positive electrode of the polar capacitor EC2, the D electrode of the gallium nitride MOS tube Q1 and the negative electrode of the diode D3 at the same time, the positive electrode of the polar capacitor EC1 is connected to the output end of the AC input and EMC circuit, and the D electrode of the gallium nitride MOS tube Q2 is connected to the other end of the resistor BC2 The G poles of the two ends of the gallium nitride MOS tube Q2 are simultaneously connected to the negative pole of the voltage regulator tube ZD1, one end of the resistor R7, one end of the capacitor C3 and one end of the resistor R6. The other end of the resistor R6 is simultaneously connected to one end of the resistor R5, one end of the resistor R8 and the other end of the capacitor C3. The positive pole of the diode D7 is connected to the other end of the resistor R8. The S pole of the gallium nitride MOS tube Q2 is simultaneously connected to the other end of the resistor R7 and the positive pole of the voltage regulator tube ZD1 and is grounded, and is simultaneously connected to the other end of the capacitor C1, the negative pole of the polar capacitor EC1, the negative pole of the polar capacitor EC2, one end of the resistor RS1 and one end of the resistor RS2. One end of the resistor RS2 is grounded, the other end of the capacitor C1 and the negative electrode of the polar capacitor EC1 are grounded, the other end of the resistor RS1 and the other end of the resistor RS2 are connected to one end of the resistor R22 and are grounded, the G pole of the gallium nitride MOS tube Q1 is simultaneously connected to one end of the resistor R1, the negative electrode of the voltage regulator tube Z1, one end of the resistor R3 and one end of the capacitor C2, the S pole of the gallium nitride MOS tube Q1 is simultaneously connected to the positive electrode of the diode D3, one end of the inductor L2, the D pole of the gallium nitride MOS tube Q3, the negative electrode of the diode D8, the other end of the resistor R1, the positive electrode of the diode D6 and the negative electrode of the diode D5, the voltage regulator tube The positive electrode of Z1 is simultaneously connected to the positive electrode of the diode D5 and the negative electrode of the diode D6, the other end of the resistor R3 is simultaneously connected to one end of the resistor R2, one end of the resistor R4 and the other end of the capacitor C2, the positive electrode of the diode D4 is connected to the other end of the resistor R4, the G electrode of the gallium nitride MOS tube Q3 is simultaneously connected to one end of the resistor R11, the negative electrode of the voltage regulator tube Z2, one end of the resistor R10 and one end of the capacitor C8, the S electrode of the gallium nitride MOS tube Q3 is simultaneously connected to the positive electrode of the diode D8, the other end of the resistor R11, the positive electrode of the diode D11, the negative electrode of the diode D10 and one end of the capacitor C5 and is grounded,One end of the magnetic core T2C is connected to the other end of the inductor L2, and the other end is connected to the other end of the capacitor C6 and one end of the capacitor C7. The positive electrode of the voltage regulator Z2 is connected to the positive electrode of the diode D10 and the negative electrode of the diode D11. The other end of the resistor R10 is connected to one end of the resistor R9, one end of the resistor R13 and the other end of the capacitor C8. The positive electrode of the diode D9 is connected to the other end of the resistor R13. The other end of the capacitor C7 is connected to one end of the resistor R15, one end of the resistor R16 and one end of the resistor R17. The other end of the resistor R15 is connected to the other end of the resistor R16 and one end of the capacitor C10. The first end of the PFC and LLC drive control chip U1 is connected to the other end of the resistor R2 and the cathode of the diode D4, the first end of the PFC and LLC drive control chip U1 is connected to one end of the capacitor C15, the third end of the PFC and LLC drive control chip U1 is connected to the other end of the capacitor C15 and one end of the resistor R29, the other end of the resistor R29 is connected to the cathode of the diode D14, the fifth end of the PFC and LLC drive control chip U1 inputs the voltage VCC, and is connected to the anode of the diode D14, one end of the capacitor C16 and the cathode of the polar capacitor EC7, the cathode of the capacitor C16 is connected to the cathode of the diode D14 ... The other end and the negative electrode of the polarity capacitor EC7 are grounded, the No. 6 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the other end of the resistor R17 and one end of the capacitor C10, the No. 10 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the other end of the resistor R22 and one end of the capacitor C11, the No. 11 pin of the PFC and LLC drive control chip U1 is connected to one end of the capacitor C14, the other end of the capacitor C11 is connected to the other end of the capacitor C14 is grounded, the No. 12 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 13 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 14 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 15 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 16 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 17 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 18 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 19 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor R5, the No. 20 pin of the PFC and LLC drive control chip U1 is simultaneously connected to the negative electrode of the diode D7 and the other end of the resistor Pin 13 of the chip U1 is grounded, Pin 14 of the PFC and LLC drive control chip U1 is simultaneously connected to the other end of the resistor R9 and the negative electrode of the diode D9, Pin 16 of the PFC and LLC drive control chip U1 is connected to one end of the resistor R33, the other end of the resistor R33 is connected to one end of the resistor BC1, one end of the resistor R26 is connected to one end of the polar capacitor EC2, and the other end is connected to one end of the resistor R40, one end of the resistor R43 is connected to the other end of the resistor R40, and the other end is simultaneously connected to one end of the resistor R44 and Pin 11 of the PFC and LLC drive control chip U1, and the other end of the resistor R44 is grounded.

3. The ultra-high frequency gallium nitride LED driving power supply according to claim 2, characterized in that: The model of the PFC and LLC drive control chip U1 is SY5955.

4. The ultra-high frequency gallium nitride LED driving power supply according to claim 2, characterized in that: The AC input and EMC circuit includes: interface CN2, fuse F1, varistor MOV2, resistor R31, resistor R34, resistor R35, capacitor C19, resistor R26, resistor R27, diode D12, diode D13, common mode inductor LF3, resistor RX1, resistor RX3, resistor RX2, resistor RX4, thermistor RT1, capacitor CX2, capacitor CY4, capacitor CY3, resistor BC3, resistor BC4, common mode inductor LF2, varistor MOV1, capacitor CX1, rectifier bridge BD1, capacitor CB2, capacitor CB1, diode D1, iron core inductor L1, iron core inductor T1; Pin 1 of the interface CN2 is connected to the ground, pin 3 is connected to one end of the varistor MOV2 and pin 2 of the common-mode inductor LF3, pin 5 is connected to one end of the fuse F1, the other end of the fuse F1 is connected to pin 1 of the common-mode inductor LF3 and the other end of the varistor MOV2, pin 3 of the common-mode inductor LF3 is connected to the positive electrode of the diode D12 and one end of the thermistor RT1, the negative electrode of the diode D12 is connected to one end of the resistor R26, pin 4 of the common-mode inductor LF3 is connected to the positive electrode of the diode D13, one end of the capacitor CX2, one end of the resistor RX1, and the positive electrode of the diode D13. One end of the resistor RX3, one end of the capacitor CY3 and pin 1 of the common-mode inductor LF2 are connected, the cathode of the diode D13 is connected to one end of the resistor R27, one end of the resistor R31 is simultaneously connected to the other end of the resistor R26 and the other end of the resistor R27, and the other end is connected to one end of the resistor R34, the other end of the resistor R34 is simultaneously connected to one end of the resistor R35 and one end of the capacitor C19 and is connected to pin 9 of the PFC and LLC drive control chip U1, the other end of the resistor R35 and the other end of the capacitor C19 are grounded, the other end of the thermistor RT1 is simultaneously connected to the other end of the capacitor CX2, the resistor RX 2, one end of the resistor RX4, one end of the capacitor CY4 and pin 2 of the common-mode inductor LF2, the other end of the resistor RX1 is simultaneously connected to the other end of the resistor RX2, the other end of the resistor RX3 and the other end of the resistor RX4, the other end of the capacitor CY3 is connected to one end of the resistor BC3, the other end of the capacitor CY4 is connected to one end of the resistor BC4, the other end of the resistor BC3 is connected to the other end of the resistor BC4 and is grounded, pin 4 of the common-mode inductor LF2 is simultaneously connected to one end of the varistor MOV1, one end of the capacitor CX1 and pin 3 of the rectifier BD1, the common-mode inductor LF2 Pin 3 of is simultaneously connected to the other end of the varistor MOV1, the other end of the capacitor CX1 and pin 2 of the rectifier BD1, pin 4 of the rectifier BD1 is grounded, pin 1 of the rectifier BD1 is simultaneously connected to one end of the capacitor CB2 and pin 2 of the core inductor L1, the other end of the capacitor CB2 is grounded, pin 1 of the core inductor L1 is simultaneously connected to one end of the capacitor CB1, pin 3 of the core inductor T1 and the positive electrode of the diode D1, the other end of the capacitor CB1 is grounded, the other end of the core inductor T1 is connected to one end of the resistor CB2, and the negative electrode of the diode D1 is connected to the positive electrode of the polarity capacitor EC1.

5. The ultra-high frequency gallium nitride LED driving power supply according to claim 2, characterized in that: The output synchronous rectification circuit includes: a magnetic core T2A, a magnetic core T2B, a polar capacitor EC3, a polar capacitor EC6, a polar capacitor EC4, a polar capacitor EC5, a capacitor C5, a resistor R14, a voltage regulator tube ZD2, a resistor R21, a capacitor C13, a MOS tube Q4, a resistor R23, a resistor R18, a capacitor C9, a resistor R19, a resistor R24, a MOS tube Q5, a resistor R20, a capacitor C12, a common mode inductor LF1, a resistor B1, a resistor B2, a capacitor C4, a capacitor CY1, a capacitor CY2, a resistor R12, an interface CN1, and a synchronous rectification controller U2; Pin No. 9 of the magnetic core T2A is connected to pin No. 10 of the magnetic core T2B and is also connected to the positive electrode of the polar capacitor EC3, one end of the resistor R14, the positive electrode of the polar capacitor EC4, the positive electrode of the polar capacitor EC5, the positive electrode of the polar capacitor EC6, one end of the capacitor C5 and pin No. 2 of the common-mode inductor LF1. Pin No. 1 of the common-mode inductor LF1 is also connected to the negative electrode of the polar capacitor EC3, the negative electrode of the polar capacitor EC4, the negative electrode of the polar capacitor EC5, the negative electrode of the polar capacitor EC6 and the other end of the capacitor C5 and is grounded. One end of the capacitor C5 is input with voltage VOUT, the negative electrode of the polar capacitor EC4 is grounded, and the magnetic core T2 Pin No. 11 and Pin No. 12 of A are simultaneously connected to one end of the resistor R24, the D pole of the MOS tube Q5 and one end of the resistor R20, Pin No. 7 and Pin No. 8 of the magnetic core T2B are simultaneously connected to one end of the resistor R21, the D pole of the MOS tube Q4 and one end of the resistor R23, the other end of the resistor R21 is connected to one end of the capacitor C13, the G pole of the MOS tube Q4 is connected to one end of the resistor R18, the other end of the resistor R14 is connected to the negative pole of the voltage regulator tube ZD2, the other end of the resistor R20 is connected to one end of the capacitor C12, the G pole of the MOS tube Q5 is connected to one end of the resistor R19, and Pin No. 1 of the synchronous rectification controller U2 is connected to the negative pole of the MOS tube Q5. The pin No. 2 of the synchronous rectifier controller U2 is connected to the other end of the resistor R19, the pin No. 2 of the synchronous rectifier controller U2 is connected to one end of the capacitor C9 and grounded, the pin No. 3 of the synchronous rectifier controller U2 is connected to the other end of the resistor R24, the pin No. 4 of the synchronous rectifier controller U2 is simultaneously connected to the S pole of the MOS tube Q5 and the other end of the capacitor C12 and grounded, the pin No. 5 of the synchronous rectifier controller U2 is simultaneously connected to the S pole of the MOS tube Q4 and the other end of the capacitor C13 and grounded, the pin No. 6 of the synchronous rectifier controller U2 is connected to the other end of the resistor R23, and the pin No. 7 of the synchronous rectifier controller U2 is simultaneously connected to the positive electrode of the voltage regulator tube ZD2 and the other end of the capacitor C9 One end is connected, pin 8 of the synchronous rectification controller U2 is connected to the other end of the resistor R18, pin 3 of the common-mode inductor LF1 is simultaneously connected to one end of the resistor B1, one end of the capacitor C4, one end of the resistor R12, and pins 4 and 5 of the interface CN1, one end of the resistor R12 outputs a voltage VOUT1, the other end of the resistor B1 is connected to one end of the capacitor CY1, and the other end of the capacitor CY1 is connected to the ground, pin 4 of the common-mode inductor LF1 is simultaneously connected to one end of the resistor B2, the other end of the capacitor C4, the other end of the resistor R12, and pins 1 and 2 of the interface CN1, and one end of the resistor R12 is grounded,The other end of the resistor B2 is connected to one end of the capacitor CY2, and the other end of the capacitor CY2 is connected to the ground.

6. The ultra-high frequency gallium nitride LED driving power supply according to claim 2, characterized in that: The auxiliary power supply circuit includes: a diode D15, a resistor R25, a resistor R28, a resistor R30, a resistor R32, a capacitor C18, a capacitor C17, and a magnetic core T2D; The cathode of the diode D15 is connected to the anode of the polarity capacitor EC7, and the anode is also connected to one end of the resistor R25 and one end of the resistor R28. Pin 3 of the magnetic core T2D is also connected to the other end of the resistor R58, the other end of the resistor R28, one end of the resistor R30 and one end of the capacitor C17. Pin 5 of the magnetic core T2D is grounded. The other end of the resistor R30 is also connected to one end of the resistor R32, one end of the capacitor C18 and pin 7 of the PFC and LLC drive control chip U1. The other end of the capacitor C17 is also connected to the other end of the resistor R32 and the other end of the capacitor C18 and is grounded.

7. The ultra-high frequency gallium nitride LED driving power supply according to claim 2, characterized in that: The output loop control circuit includes: resistor R38, capacitor C21, optocoupler U3, resistor R37, resistor R41, resistor R39, capacitor C20, capacitor C22, capacitor C23, resistor R42, resistor R45, resistor R46, voltage-stabilizing transistor U4, capacitor CY5, resistor BC5, capacitor CY6, resistor BC6; One end of the resistor R38 is connected to pin 8 of the PFC and LLC drive control chip U1, and the other end is connected to one end of the capacitor C21 and pin 1 of the optocoupler U3. Pin 2 of the optocoupler U3 is connected to the other end of the capacitor C21 and grounded. Pin 3 of the optocoupler U3 is connected to one end of the resistor R37 and one end of the resistor R41. Pin 4 of the optocoupler U3 is connected to the other end of the resistor R41, one end of the capacitor C22, one end of the capacitor C23 and pin 3 of the voltage-stabilizing transistor U4. One end of the resistor R39 is connected to the other end of the resistor R37 and one end of the capacitor C20 and outputs the voltage VOUT. The other end of the capacitor C20 is connected to the public A common end, the other end of the resistor R39 is simultaneously connected to one end of the resistor R44, the other end of the capacitor C23, one end of the resistor R46, one end of the resistor R45 and pin No. 2 of the voltage-regulating transistor U4, the other end of the capacitor C22 is connected to the other end of the resistor R44, the other end of the resistor R45 is simultaneously connected to the other end of the resistor R46 and pin No. 1 of the voltage-regulating transistor U4, one end of the capacitor CY5 is connected to one end of the resistor BC5, one end of the capacitor CY6 is connected to one end of the resistor BC6, the other end of the capacitor CY5 is grounded, the other end of the resistor BC5 is grounded, the other end of the capacitor CY6 is connected to the positive electrode of the polarity capacitor EC2, and the other end of the resistor BC6 is grounded.

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