Computer power supply circuit

Abstract

The utility model discloses a computer power supply circuit, which relates to the field of computer power supplies and comprises a switching circuit, a filter rectifier circuit and a power factor correction circuit which are connected in sequence. The switching circuit comprises a socket, a switch, a safety capacitor CX1, safety capacitors CY1 to CY2 and a fuse F1, the filtering and rectifying circuit comprises an MOS (Metal Oxide Semiconductor) tube Q5, a transformer T1, capacitors C3-C4, a capacitor C53, a capacitor C66, resistors R10-R11, a resistor R30, resistors R51-R52, resistors R88-R89, a diode D1, a diode D6, a diode D10, common mode inductors FL1-FL2, an iron core inductor L1, a chip U10, a chip U11, a piezoresistor TH1, a polar capacitor C1 and a rectifier bridge BD2, and the filtering and rectifying circuit outputs 12V power after filtering. The power supply can be independently controlled to be turned on or turned off. And through light-emitting indication of the light-emitting diode, a user can conveniently master the working state of the circuit and conveniently find faults in time, and maintenance is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of computer power supplies, in particular to a computer power supply circuit. Background Art

[0002] In the field of computer servers, there is an expansion box that does not have a motherboard but only has devices such as a hard disk. Because the expansion box does not have a motherboard, it is impossible to control the start and stop of the expansion box power supply, which makes it very inconvenient during on-site deployment. Currently, in order to achieve power control of the expansion box, the traditional practice is to short-circuit the power supply in the startup working state, and when shutting down, it is necessary to disconnect the AC power input plug. The above-mentioned power control has the following shortcomings: not only is the operation cumbersome, but there are also safety hazards.

[0003] Therefore, a computer power supply circuit is provided, which can independently control the power on and off and output the auxiliary power supply voltage. Utility Model Content

[0004] To achieve the above object, the present invention adopts the following technical solution: a computer power supply circuit, comprising: a switching circuit, a filtering and rectifying circuit, and a power factor correction circuit, wherein the switching circuit, the filtering and rectifying circuit and the power factor correction circuit are connected in sequence;

[0005] The switch circuit includes: a socket, a switch, a safety capacitor CX1, safety capacitors CY1-CY2, and a fuse F1. The socket is provided with a live wire terminal L, a neutral wire terminal N, and a ground wire terminal G. The live wire terminal L, the fuse F1, the safety capacitor CX1, and the neutral wire terminal N are connected in series in sequence. One end of the safety capacitor CY1 and the safety capacitor CY2 are both connected to the ground wire terminal G. The other end of the safety capacitor CY1 is connected between the neutral wire terminal N and the safety capacitor CX1. The other end of the safety capacitor CY2 is connected between the live wire terminal L and the fuse F1. One end of the switch is connected between the safety capacitor CX1 and the neutral wire terminal N.

[0006] The filtering and rectifying circuit includes: MOS tube Q5, transformer T1, capacitors C3-C4, capacitor C53, capacitor C66, resistors R10-R11, resistor R30, resistors R51-R52, resistors R88-R89, diode D1, diode D6, diode D10, common-mode inductors FL1-FL2, iron core inductor L1, chip U10, chip U11, varistor TH1, polarized capacitor C1 and rectifier bridge BD2, the live wire terminal L, fuse F1 and the live wire input end of the common-mode inductor FL1 are connected in series in sequence, the live wire terminal L, fuse F1, resistor R88, resistor R51 and the common-mode inductor FL 1 are connected in series in sequence, the neutral line terminal N, the switch and the neutral line input terminal of the common-mode inductor FL1 are connected in series in sequence, the neutral line terminal N, the switch, the resistor R89, the resistor R52 and the neutral line input terminal of the common-mode inductor FL1 are connected in series in sequence, one end of the chip U10 is connected between the resistor R88 and the resistor R51, the 5th pin, the 6th pin, the 7th pin and the 8th pin of the chip U11 are all connected between the resistor R88 and the resistor R51, the other end of the chip U10 is connected between the resistor R89 and the resistor R52, the 1st pin, the 2nd pin, the 3rd pin and the 4th pin of the chip U11 are all connected between the resistor R88 and the resistor R51. The common-mode inductor FL1, the rectifier bridge BD2 and the common-mode inductor FL2 are connected in series in sequence. The capacitor C4 is connected between the two DC output pins of the rectifier bridge BD2. The live input pin of the common-mode inductor FL2, the capacitor C53, the capacitor C66 and the neutral input pin of the common-mode inductor FL2 are connected in series in sequence. The live output pin of the common-mode inductor FL2, the diode D1, the varistor TH1 and the drain of the MOS tube Q5 are connected in series in sequence. The iron core inductor L1 and the diode D6 are connected in series and then in parallel with the diode D1. The capacitor C3 is connected between the live output pin and the neutral output pin of the common-mode inductor FL2. The positive terminal of the polarized capacitor C1 is connected in series with the positive terminal of the polarized capacitor C1. The gate of the MOS transistor Q5 is connected between the varistor TH1 and the drain of the MOS transistor Q5. The negative electrode of the polarized capacitor C1 is grounded. The resistor R10 and the resistor R11 are connected in parallel, and one end is connected to the neutral line output pin of the common-mode inductor FL2. The other end of the resistor R10 and the resistor R11 are connected in parallel between the polarized capacitor C1 and ground. The gate of the MOS transistor Q5, the resistor R30, the primary winding of the transformer T1, and the positive electrode of the diode D10 are connected in series in sequence. The source of the MOS transistor Q5 is connected between the resistor R30 and the primary winding of the transformer T1. The negative electrode of the diode D10 is connected between the varistor TH1 and the drain of the MOS transistor Q5.

[0007] Preferably, the power factor correction circuit includes a VDD pin, a correction circuit and a drive circuit. The neutral line output pin of the common-mode inductor FL2 and the output pin of the core inductor L1 are both connected to the correction circuit. The correction circuit and the drive circuit are both connected to the VDD pin. The correction circuit is connected to the drive circuit. The drive circuit is connected to the gate of the MOS tube Q5 and the primary winding of the transformer T1.

[0008] Preferably, the filter rectifier circuit further includes: a diode D25, diodes D38-D39, a capacitor C64, a capacitor C26, a polarized capacitor C32, a polarized capacitor C37, a polarized capacitor C39, a resistor R100, a resistor R115, a coupled inductor L12 and an iron core inductor L9, the two ends of the secondary winding of the transformer T1 are respectively connected to the positive electrode of the diode D38 and the ground, the negative electrode of the diode D38, the primary winding of the coupled inductor L12, the iron core inductor L9 and the 12V positive output end are connected in series in sequence. The positive electrode and negative electrode of the diode D39 are grounded to the negative electrode of the diode D38 respectively; one end of the capacitor C64, the capacitor C26 and the polarized capacitor C32 are connected between the primary winding of the coupling inductor L12 and the iron core inductor L9; the other ends of the capacitor C64, the capacitor C26 and the polarized capacitor C32 are grounded; one end of the polarized capacitor C37 and the resistor R100 are connected between the iron core inductor L9 and the 12V positive output terminal; the other ends of the polarized capacitor C37 and the resistor R100 are grounded;

[0009] The positive electrode of the diode D25 is connected to the negative output terminal of 12V, the negative electrode of the diode D25, the secondary winding of the coupled inductor L12 and the ground are connected in series in sequence, and one end of the polarized capacitor C39 and the resistor R115 are both connected between the positive electrode of the diode D25 and the negative output terminal of 12V, and the other ends of the polarized capacitor C39 and the resistor R115 are both grounded.

[0010] Preferably, the filtering and rectifying circuit further includes: capacitors C52 to C53, resistors R40, R44, R56 and R64. The capacitor C53 and the resistor R64 are connected in series and then in parallel to the diode D38. The resistor R56 is connected in parallel to the resistor R64. The capacitor C52 and the resistor R44 are connected in series and then in parallel to the diode D39. The resistor R40 is connected in parallel to the resistor R44.

[0011] Preferably, the correction circuit includes: chip U1, iron core inductor L1, transistor Q3, transistor Q6, diode D8, diode D11, diode D17, diode D22, diode D38, resistors R2 to R4, resistors R6 to R9, resistor R12, resistor R17, resistor R19, resistor R21, resistor R27, resistor R39, capacitor C2, capacitor C8, capacitor C13, capacitor C19, capacitor C110 and MOS tube Q2, the neutral line output pin of the common mode inductor FL2, resistor R27 and chip U 1 is connected in series, the Isense pin of the chip U1, the diode D11, the diode D22, the diode D38 and the ground are connected in series, the capacitor C8 is connected between the Isense pin of the chip U1 and the ground, the VDD pin, the diode D17, the transistor Q6 and the transistor Q3 are connected in series with the ground, the output pin of the core inductor L1 is connected to the drain of the MOS tube Q2, the source of the MOS tube Q2 is grounded, the resistor R19 is connected between the gate and source of the MOS tube Q2, and the MOS tube Q2 is connected in series. The gate, resistor R39 and one end of resistor R17 are connected in series in sequence. The other end of the resistor R17 is connected between transistor Q6 and transistor Q3. The diode D8 is connected in parallel with the resistor R17. One end of the resistor R21 is connected to the base of transistor Q6 and the base of transistor Q3. The other end of the resistor R21 is connected to the PFC pin of chip U1. One end of the capacitor C110 is connected between diode D17 and transistor Q6. The other end of the capacitor C110 is grounded. The Iac pin of chip U1, resistor R12, resistor R8, resistor R 4 and the live input pin of the common-mode inductor FL2 are connected in series in sequence. The capacitor C13 is connected between the Iac pin of the chip U1 and ground. The Vrms pin of the chip U1, the resistor R6, the resistor R9, the resistor R7, the resistor R3 and the live input pin of the common-mode inductor FL2 are connected in series in sequence. One end of the resistor R2 and the capacitor C2 are both connected between the resistor R6 and the resistor R9, and the other ends of the resistor R2 and the capacitor C2 are both grounded. One end of the capacitor C19 is connected between the Vrms pin of the chip U1 and the resistor R6, and the other end of the capacitor C19 is grounded.

[0012] Preferably, the driving circuit includes: chip U13, resistor R1, resistor R14, resistor R16, resistor R31, resistors R36-R38, resistor R41, resistor R50, resistor R90, resistor R99, resistor R101, MOS tube Q1, diode D7, diode D9, diode D12, diode D19, capacitors C107-C109 and Zener diode ZD4, the PWM pin of the chip U1, resistor R37 and resistor R90 are connected in series in sequence, and the resistor R90 is connected to the Hin pin and Lin pin of the chip U13 The DClimit pin of the chip U1, the resistor R41 and the source of the MOS transistor Q1 are connected in series in sequence. The two ends of the resistor R1 are connected to the source of the MOS transistor Q1 and the ground respectively. The two ends of the resistor R14 are connected to the gate and source of the MOS transistor Q1 respectively. The LO pin of the chip U13, the resistor R16, the resistor R38 and the gate of the MOS transistor Q1 are connected in series in sequence. The anode of the diode D7 is connected between the resistor R16 and the resistor R38. The cathode of the diode D7 is connected between the LO pin of the chip U13 and the resistor R16. The MOS transistor Q The drain of 1 is connected between the primary winding of the transformer T1 and the diode D10. The HO pin of the chip U13, the resistor R31, the resistor R36 and the gate of the MOS tube Q5 are connected in series in sequence. The anode of the diode D12 is connected between the resistor R31 and the resistor R36. The cathode of the diode D12 is connected between the HO pin of the chip U13 and the resistor R31. One end of the diode D9 is connected between the source of the MOS tube Q5 and the primary winding of the transformer T1. The other end of the diode D9 is grounded. The VDD pin, the resistor R99, the diode The diode D19, the resistor R101 and the VB pin of the chip U13 are connected in series in sequence. The voltage regulator diode ZD4 and the capacitor C107 are connected in parallel, and their two ends are respectively connected to the anode of the diode D19 and the GND pin of the chip U13. The VCC pin of the chip U13 is connected to the anode of the diode D19. The two ends of the capacitors C109, C108 and the resistor R94 are respectively connected to the VB pin and the Vs pin of the chip U13. One end of the resistor R50 is connected between the resistor R30 and the primary winding of the transformer T1, and the other end of the resistor R50 is connected to the Vs pin of the chip U13.

[0013] Preferably, the correction circuit also includes: a capacitor C11, a resistor R18, a resistor R20, a resistor R29, and a resistor R32. The Vfb pin of the chip U1, the resistor R29, the resistor R20, and one end of the resistor R18 are connected in series in sequence. One end of the resistor R32 is connected between the Vfb pin of the chip U1 and the resistor R29. The other end of the resistor R32 is grounded. The two ends of the capacitor C11 are respectively connected to the Vfb pin of the chip U1 and the ground.

[0014] Preferably, a 5VSB circuit is further included, and the 5VSB circuit is connected to the switching circuit. The 5VSB circuit includes a transformer T3, a chip U9, a voltage regulator chip U7, a resistor R18, resistors R24 to R26, a resistor R28, a resistor R34 to R35, a resistor R46, a resistor R49, a resistor R58, a resistor R60, a resistor R62, a resistor R67, a resistor R95, a diode D13, a diode D14, a diode D15, a diode D20, a diode D32, a diode D33, a diode D37, a diode D39, a voltage regulator diode ZD3, a voltage regulator diode ZD6, a voltage regulator diode ZD9, a voltage regulator diode ZD10, a capacitor C4, a capacitor C10, a capacitor C17, and a capacitor C18, capacitor C30, capacitor C49, capacitor C50, capacitor C56, capacitor C67, polarized capacitor C16, polarized capacitor C14, polarized capacitor C29, polarized capacitor C42, iron core inductor L5, phototransistor V1, light emitting diode, 5VSB output port, 5VSB1 output port, the transformer T3 is provided with a first primary winding, a second primary winding and a third secondary winding, the live wire terminal L of the socket, the diode D33 and the input end of the resistor R35 are connected in series in sequence, the neutral wire terminal N of the socket, the diode D32 and the input end of the resistor R35 are connected in series in sequence, the resistor R35, the resistor R34, the resistor R26 and the AC input pin of the chip U9 are connected in sequence, the chip U9 The Drain pin, the first primary winding of the transformer T3 and the other end of the resistor R18 are connected in series in sequence. The positive poles of the Zener diode ZD9 and the diode D13 are connected to the two ends of the first primary winding of the transformer T3 respectively. The negative poles of the Zener diode ZD9 and the diode D13 are connected to one end of the capacitor C4. The other end of the capacitor C4 is connected between the first primary winding of the transformer T3 and the resistor R18. One end of the second primary winding of the transformer T3 is grounded. The other end of the second primary winding of the transformer T3, the resistor R28, the diode D14, the diode D15 and the VDD pin of the chip U9 are connected in series in sequence. The positive pole of the Zener diode ZD6 is grounded. The negative pole of the Zener diode ZD6, the resistor R67 and the VDD pin of the chip U9 are connected in series in sequence. The VDD pins are connected in series in sequence, one end of the capacitor C17, the negative electrode of the polarized capacitor C16 and the negative electrode of the polarized capacitor C14 are all grounded, the positive electrode of the polarized capacitor C16 and the other end of the capacitor C17 are all connected between the diode D15 and the VDD pin of the chip U9, the positive electrode of the polarized capacitor C14 is connected between the diode D14 and the diode D15, the phototransistor V1, the capacitor C10 and the voltage-stabilizing diode ZD3 are all connected between the FB pin of the chip U9 and the ground, the capacitor C18 and the resistor R24 are all connected between the AC input pin of the chip U9 and the ground, the resistor R95 and the resistor 25 are connected in parallel, the two ends of which are respectively connected to the CS pin of the chip U9 and the ground, and one end of the third secondary winding of the transformer is grounded.The other end of the third secondary winding of the transformer, the diode D20, the core inductor L5 and the 5VSB output port are connected in series in sequence, the 5VSB1 output port is connected between the diode D20 and the core inductor L5, one end of the polarized capacitor C42 is connected between the core inductor L5 and the 5VSB output port, the other end of the polarized capacitor C42 is grounded, the cathode of the diode D20, the resistor R46, the voltage regulator chip U7 and the ground are connected in series in sequence, the resistor R49 is connected in series with the light emitting diode and then in parallel with the resistor R46, the diode D20, the core inductor L5, the resistor R62, the resistor R60 and the ground are connected in series in sequence, one end of the capacitor C56 is connected Connected between resistor R46 and voltage regulator chip U7, the other end of capacitor C56 is connected between resistor R62 and resistor R60, the resistor R58 is connected in series with capacitor C30 and then in parallel with capacitor C56, the diode D39 is connected in series with capacitor C67 and then in parallel with resistor R62, the diode D37 and diode D39 are connected in anti-parallel, the two ends of capacitor C49 and capacitor C50 are connected in parallel, respectively, the cathode of diode D20 and ground, the voltage regulator diode ZD10 is connected between the cathode of diode D20 and the core inductor L5, and the other end of the voltage regulator diode ZD10 is grounded, and the polarized capacitor C29 is connected in parallel with the voltage regulator diode ZD10.

[0015] Preferably, the 5VSB circuit further includes a phototransistor V2, a resistor R33, a transistor Q9, a diode D24, a voltage-stabilizing diode ZD2, the base of the transistor Q9, a VCC output port, and a VDD output port, the collector of the transistor Q9 is connected between the diode D14 and the diode D15, the collector of the transistor Q9, the phototransistor V2, the resistor R33, and the base of the transistor Q9 are connected in series in sequence, the emitter of the transistor Q9, the diode D24, and the VDD output port are connected in series in sequence, the emitter of the transistor Q9 is connected to the VCC output port, and the base of the transistor Q9, the voltage-stabilizing diode ZD2, and the ground are connected in series in sequence.

[0016] The beneficial effects of this utility model include: the filter and rectifier circuit outputs 12V power after filtering, and a switch is provided on the neutral line between the switching circuit and the filter and rectifier circuit, allowing the power supply to be independently turned on and off. Furthermore, the light-emitting diodes (LEDs) provide an indication of the circuit's operating status, allowing users to promptly detect faults and facilitate maintenance. Filtering and rectification are performed first, followed by subsequent circuitry to step down the voltage to a specific voltage, simplifying the circuit. Furthermore, each circuit can be modularly manufactured and subsequently assembled for easy wiring, facilitating production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings further illustrate the present invention, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention.

[0018] Figure 1 A circuit diagram of a computer power supply circuit provided in one embodiment of the present utility model;

[0019] Figure 2 This is a circuit diagram of a 5VSB circuit provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0021] It should be noted that, in the present invention, unless otherwise stated, when an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0022] like Figure 1-Figure 2 As shown in , an embodiment of the present invention provides a computer power supply circuit, comprising: a switching circuit, a filtering and rectifying circuit, and a power factor correction circuit, wherein the switching circuit, the filtering and rectifying circuit, and the power factor correction circuit are connected in sequence;

[0023] The switch circuit includes: a socket, a switch, a safety capacitor CX1, safety capacitors CY1-CY2, and a fuse F1. The socket is provided with a live wire terminal L, a neutral wire terminal N, and a ground wire terminal G. The live wire terminal L, the fuse F1, the safety capacitor CX1, and the neutral wire terminal N are connected in series in sequence. One end of the safety capacitor CY1 and the safety capacitor CY2 are both connected to the ground wire terminal G. The other end of the safety capacitor CY1 is connected between the neutral wire terminal N and the safety capacitor CX1. The other end of the safety capacitor CY2 is connected between the live wire terminal L and the fuse F1. One end of the switch is connected between the safety capacitor CX1 and the neutral wire terminal N.

[0024] The filtering and rectifying circuit includes: MOS tube Q5, transformer T1, capacitors C3-C4, capacitor C53, capacitor C66, resistors R10-R11, resistor R30, resistors R51-R52, resistors R88-R89, diode D1, diode D6, diode D10, common-mode inductors FL1-FL2, iron core inductor L1, chip U10, chip U11, varistor TH1, polarized capacitor C1 and rectifier bridge BD2, the live wire terminal L, fuse F1 and the live wire input end of the common-mode inductor FL1 are connected in series in sequence, the live wire terminal L, fuse F1, resistor R88, resistor R51 and the common-mode inductor FL 1 are connected in series in sequence, the neutral line terminal N, the switch and the neutral line input terminal of the common-mode inductor FL1 are connected in series in sequence, the neutral line terminal N, the switch, the resistor R89, the resistor R52 and the neutral line input terminal of the common-mode inductor FL1 are connected in series in sequence, one end of the chip U10 is connected between the resistor R88 and the resistor R51, the 5th pin, the 6th pin, the 7th pin and the 8th pin of the chip U11 are all connected between the resistor R88 and the resistor R51, the other end of the chip U10 is connected between the resistor R89 and the resistor R52, the 1st pin, the 2nd pin, the 3rd pin and the 4th pin of the chip U11 are all connected between the resistor R88 and the resistor R51. The common-mode inductor FL1, the rectifier bridge BD2 and the common-mode inductor FL2 are connected in series in sequence. The capacitor C4 is connected between the two DC output pins of the rectifier bridge BD2. The live input pin of the common-mode inductor FL2, the capacitor C53, the capacitor C66 and the neutral input pin of the common-mode inductor FL2 are connected in series in sequence. The live output pin of the common-mode inductor FL2, the diode D1, the varistor TH1 and the drain of the MOS tube Q5 are connected in series in sequence. The iron core inductor L1 and the diode D6 are connected in series and then in parallel with the diode D1. The capacitor C3 is connected between the live output pin and the neutral output pin of the common-mode inductor FL2. The positive terminal of the polarized capacitor C1 is connected in series with the positive terminal of the polarized capacitor C1. The gate of the MOS transistor Q5 is connected between the varistor TH1 and the drain of the MOS transistor Q5. The negative electrode of the polarized capacitor C1 is grounded. The resistor R10 and the resistor R11 are connected in parallel, and one end is connected to the neutral line output pin of the common-mode inductor FL2. The other end of the resistor R10 and the resistor R11 are connected in parallel between the polarized capacitor C1 and ground. The gate of the MOS transistor Q5, the resistor R30, the primary winding of the transformer T1, and the positive electrode of the diode D10 are connected in series in sequence. The source of the MOS transistor Q5 is connected between the resistor R30 and the primary winding of the transformer T1. The negative electrode of the diode D10 is connected between the varistor TH1 and the drain of the MOS transistor Q5.

[0025] The power factor correction circuit includes a VDD pin, a correction circuit, and a drive circuit. The neutral line output pin of the common-mode inductor FL2 and the output pin of the core inductor L1 are both connected to the correction circuit. The correction circuit and the drive circuit are both connected to the VDD pin. The correction circuit is connected to the drive circuit. The drive circuit is connected to the gate of the MOS transistor Q5 and the primary winding of the transformer T1.

[0026] The filtering and rectifying circuit further includes: a diode D25, diodes D38-D39, a capacitor C64, a capacitor C26, a polarized capacitor C32, a polarized capacitor C37, a polarized capacitor C39, a resistor R100, a resistor R115, a coupling inductor L12, and an iron core inductor L9. The two ends of the secondary winding of the transformer T1 are connected to the positive electrode of the diode D38 and the ground respectively. The negative electrode of the diode D38, the primary winding of the coupling inductor L12, the iron core inductor L9, and the 12V positive output terminal are connected in series in sequence. The positive electrode and negative electrode of the diode D39 are grounded and the negative electrode of the diode D38 respectively. One end of the capacitor C64, the capacitor C26 and the polarized capacitor C32 are all connected between the primary winding of the coupling inductor L12 and the iron core inductor L9. The other ends of the capacitor C64, the capacitor C26 and the polarized capacitor C32 are all grounded. One end of the polarized capacitor C37 and the resistor R100 are both connected between the iron core inductor L9 and the 12V positive output terminal. The other ends of the polarized capacitor C37 and the resistor R100 are both grounded.

[0027] The positive electrode of the diode D25 is connected to the negative output terminal of 12V, the negative electrode of the diode D25, the secondary winding of the coupled inductor L12 and the ground are connected in series in sequence, and one end of the polarized capacitor C39 and the resistor R115 are both connected between the positive electrode of the diode D25 and the negative output terminal of 12V, and the other ends of the polarized capacitor C39 and the resistor R115 are both grounded.

[0028] The filtering and rectifying circuit further includes: capacitors C52 to C53, resistors R40, R44, R56 and R64. The capacitor C53 and the resistor R64 are connected in series and then in parallel to the diode D38. The resistor R56 is connected in parallel to the resistor R64. The capacitor C52 and the resistor R44 are connected in series and then in parallel to the diode D39. The resistor R40 is connected in parallel to the resistor R44.

[0029] The correction circuit includes: chip U1, iron core inductor L1, transistor Q3, transistor Q6, diode D8, diode D11, diode D17, diode D22, diode D38, resistors R2-R4, resistors R6-R9, resistor R12, resistor R17, resistor R19, resistor R21, resistor R27, resistor R39, capacitor C2, capacitor C8, capacitor C13, capacitor C19, capacitor C110 and MOS tube Q2, the neutral line output pin of the common mode inductor FL2, resistor R27 and the I The sense pins are connected in series in sequence. The Isense pin of the chip U1, the diode D11, the diode D22, the diode D38 and the ground are connected in series in sequence. The capacitor C8 is connected between the Isense pin of the chip U1 and the ground. The VDD pin, the diode D17, the transistor Q6 and the transistor Q3 are connected in series in sequence with the ground. The output pin of the core inductor L1 is connected to the drain of the MOS tube Q2. The source of the MOS tube Q2 is grounded. The resistor R19 is connected between the gate and source of the MOS tube Q2. The gate of the MOS tube Q2 is connected to the ground. The base, resistor R39 and one end of resistor R17 are connected in series in sequence. The other end of the resistor R17 is connected between transistor Q6 and transistor Q3. The diode D8 is connected in parallel with the resistor R17. One end of the resistor R21 is connected to the base of transistor Q6 and the base of transistor Q3. The other end of the resistor R21 is connected to the PFC pin of chip U1. One end of the capacitor C110 is connected between diode D17 and transistor Q6. The other end of the capacitor C110 is grounded. The Iac pin of chip U1, resistor R12, resistor R8, and resistor R4 The live wire input pin of the common-mode inductor FL2 is connected in series in sequence. The capacitor C13 is connected between the Iac pin of the chip U1 and the ground. The Vrms pin of the chip U1, the resistor R6, the resistor R9, the resistor R7, the resistor R3 and the live wire input pin of the common-mode inductor FL2 are connected in series in sequence. One end of the resistor R2 and the capacitor C2 are both connected between the resistor R6 and the resistor R9, and the other end of the resistor R2 and the capacitor C2 are both grounded. One end of the capacitor C19 is connected between the Vrms pin of the chip U1 and the resistor R6, and the other end of the capacitor C19 is grounded.

[0030] The driving circuit includes: chip U13, resistor R1, resistor R14, resistor R16, resistor R31, resistors R36-R38, resistor R41, resistor R50, resistor R90, resistor R99, resistor R101, MOS tube Q1, diode D7, diode D9, diode D12, diode D19, capacitors C107-C109 and voltage stabilizing diode ZD4, the PWM pin of the chip U1, resistor R37 and resistor R90 are connected in series in sequence, the resistor R90 is connected to the Hin pin and Lin pin of the chip U13, the The DClimit pin of the chip U1, the resistor R41, and the source of the MOS transistor Q1 are connected in series in sequence. The two ends of the resistor R1 are connected to the source of the MOS transistor Q1 and the ground respectively. The two ends of the resistor R14 are connected to the gate and source of the MOS transistor Q1 respectively. The LO pin of the chip U13, the resistor R16, the resistor R38, and the gate of the MOS transistor Q1 are connected in series in sequence. The positive electrode of the diode D7 is connected between the resistor R16 and the resistor R38. The negative electrode of the diode D7 is connected between the LO pin of the chip U13 and the resistor R16. The drain is connected between the primary winding of the transformer T1 and the diode D10. The HO pin of the chip U13, the resistor R31, the resistor R36 and the gate of the MOS tube Q5 are connected in series in sequence. The anode of the diode D12 is connected between the resistor R31 and the resistor R36. The cathode of the diode D12 is connected between the HO pin of the chip U13 and the resistor R31. One end of the diode D9 is connected between the source of the MOS tube Q5 and the primary winding of the transformer T1. The other end of the diode D9 is grounded. The VDD pin, the resistor R99, the diode D19, resistor R101 and the VB pin of chip U13 are connected in series in sequence. After the voltage regulator diode ZD4 and capacitor C107 are connected in parallel, their two ends are connected to the positive electrode of diode D19 and the GND pin of chip U13 respectively. The VCC pin of chip U13 is connected to the positive electrode of diode D19. The two ends of capacitor C109, capacitor C108 and resistor R94 are connected to the VB pin and Vs pin of chip U13 respectively. One end of the resistor R50 is connected between resistor R30 and the primary winding of transformer T1, and the other end of the resistor R50 is connected to the Vs pin of chip U13.

[0031] The correction circuit also includes: a capacitor C11, a resistor R18, a resistor R20, a resistor R29, and a resistor R32. The Vfb pin of the chip U1, the resistor R29, the resistor R20, and one end of the resistor R18 are connected in series in sequence. One end of the resistor R32 is connected between the Vfb pin of the chip U1 and the resistor R29, and the other end of the resistor R32 is grounded. The two ends of the capacitor C11 are respectively connected to the Vfb pin of the chip U1 and the ground.

[0032] It also includes a 5VSB circuit, which is connected to the switching circuit. The 5VSB circuit includes a transformer T3, a chip U9, a voltage regulator chip U7, a resistor R18, resistors R24 to R26, a resistor R28, resistors R34 to R35, a resistor R46, a resistor R49, a resistor R58, a resistor R60, a resistor R62, a resistor R67, a resistor R95, a diode D13, a diode D14, a diode D15, a diode D20, a diode D32, a diode D33, a diode D37, a diode D39, a Zener diode ZD3, a Zener diode ZD6, a Zener diode ZD9, a Zener diode ZD10, a capacitor C4, a capacitor C10, a capacitor C17, and a capacitor C18 , capacitor C30, capacitor C49, capacitor C50, capacitor C56, capacitor C67, polarized capacitor C16, polarized capacitor C14, polarized capacitor C29, polarized capacitor C42, iron core inductor L5, phototransistor V1, light emitting diode, 5VSB output port, 5VSB1 output port, the transformer T3 is provided with a first primary winding, a second primary winding and a third secondary winding, the live wire terminal L of the socket, the diode D33 and the input end of the resistor R35 are connected in series in sequence, the neutral wire terminal N of the socket, the diode D32 and the input end of the resistor R35 are connected in series in sequence, the resistor R35, the resistor R34, the resistor R26 and the AC input pin of the chip U9 are connected in sequence, the Dr of the chip U9 The ain pin, the first primary winding of the transformer T3 and the other end of the resistor R18 are connected in series in sequence. The positive poles of the Zener diode ZD9 and the diode D13 are connected to the two ends of the first primary winding of the transformer T3 respectively. The negative poles of the Zener diode ZD9 and the diode D13 are connected to one end of the capacitor C4. The other end of the capacitor C4 is connected between the first primary winding of the transformer T3 and the resistor R18. One end of the second primary winding of the transformer T3 is grounded. The other end of the second primary winding of the transformer T3, the resistor R28, the diode D14, the diode D15 and the VDD pin of the chip U9 are connected in series in sequence. The positive pole of the Zener diode ZD6 is grounded. The negative pole of the Zener diode ZD6, the resistor R67 and the V The DD pins are connected in series in sequence, one end of the capacitor C17, the negative electrode of the polarized capacitor C16 and the negative electrode of the polarized capacitor C14 are all grounded, the positive electrode of the polarized capacitor C16 and the other end of the capacitor C17 are all connected between the diode D15 and the VDD pin of the chip U9, the positive electrode of the polarized capacitor C14 is connected between the diode D14 and the diode D15, the phototransistor V1, the capacitor C10 and the voltage-stabilizing diode ZD3 are all connected between the FB pin of the chip U9 and the ground, the capacitor C18 and the resistor R24 are all connected between the AC input pin of the chip U9 and the ground, the resistor R95 and the resistor 25 are connected in parallel, the two ends of which are respectively connected to the CS pin of the chip U9 and the ground, and one end of the third secondary winding of the transformer is grounded.The other end of the third secondary winding of the transformer, the diode D20, the core inductor L5 and the 5VSB output port are connected in series in sequence, the 5VSB1 output port is connected between the diode D20 and the core inductor L5, one end of the polarized capacitor C42 is connected between the core inductor L5 and the 5VSB output port, the other end of the polarized capacitor C42 is grounded, the cathode of the diode D20, the resistor R46, the voltage regulator chip U7 and the ground are connected in series in sequence, the resistor R49 is connected in series with the light emitting diode and then in parallel with the resistor R46, the diode D20, the core inductor L5, the resistor R62, the resistor R60 and the ground are connected in series in sequence, one end of the capacitor C56 is connected Connected between resistor R46 and voltage regulator chip U7, the other end of capacitor C56 is connected between resistor R62 and resistor R60, the resistor R58 is connected in series with capacitor C30 and then in parallel with capacitor C56, the diode D39 is connected in series with capacitor C67 and then in parallel with resistor R62, the diode D37 and diode D39 are connected in anti-parallel, the two ends of capacitor C49 and capacitor C50 are connected in parallel, respectively, the cathode of diode D20 and ground, the voltage regulator diode ZD10 is connected between the cathode of diode D20 and the core inductor L5, and the other end of the voltage regulator diode ZD10 is grounded, and the polarized capacitor C29 is connected in parallel with the voltage regulator diode ZD10.

[0033] The 5VSB circuit also includes a phototransistor V2, a resistor R33, a transistor Q9, a diode D24, a voltage-stabilizing diode ZD2, the base of the transistor Q9, a VCC output port, and a VDD output port. The collector of the transistor Q9 is connected between the diode D14 and the diode D15. The collector of the transistor Q9, the phototransistor V2, the resistor R33, and the base of the transistor Q9 are connected in series in sequence. The emitter of the transistor Q9, the diode D24, and the VDD output port are connected in series in sequence. The emitter of the transistor Q9 is connected to the VCC output port. The base of the transistor Q9, the voltage-stabilizing diode ZD2, and the ground are connected in series in sequence.

[0034] The technical features of the above-described embodiments may be combined in any manner. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements should be considered within the scope of this specification.

Claims

1. A computer power supply circuit, characterized in that: include: A switching circuit, a filtering and rectifying circuit, and a power factor correction circuit, wherein the switching circuit, the filtering and rectifying circuit, and the power factor correction circuit are connected in sequence; The switch circuit includes: a socket, a switch, a safety capacitor CX1, safety capacitors CY1-CY2, and a fuse F1. The socket is provided with a live wire terminal L, a neutral wire terminal N, and a ground wire terminal G. The live wire terminal L, the fuse F1, the safety capacitor CX1, and the neutral wire terminal N are connected in series in sequence. One end of the safety capacitor CY1 and the safety capacitor CY2 are both connected to the ground wire terminal G. The other end of the safety capacitor CY1 is connected between the neutral wire terminal N and the safety capacitor CX1. The other end of the safety capacitor CY2 is connected between the live wire terminal L and the fuse F1. One end of the switch is connected between the safety capacitor CX1 and the neutral wire terminal N. The filtering and rectifying circuit includes: MOS tube Q5, transformer T1, capacitors C3-C4, capacitor C53, capacitor C66, resistors R10-R11, resistor R30, resistors R51-R52, resistors R88-R89, diode D1, diode D6, diode D10, common-mode inductors FL1-FL2, iron core inductor L1, chip U10, chip U11, varistor TH1, polarized capacitor C1 and rectifier bridge BD2, the live wire terminal L, fuse F1 and the live wire input end of the common-mode inductor FL1 are connected in series in sequence, the live wire terminal L, fuse F1, resistor R88, resistor R51 and the common-mode inductor FL 1 are connected in series in sequence, the neutral line terminal N, the switch and the neutral line input terminal of the common-mode inductor FL1 are connected in series in sequence, the neutral line terminal N, the switch, the resistor R89, the resistor R52 and the neutral line input terminal of the common-mode inductor FL1 are connected in series in sequence, one end of the chip U10 is connected between the resistor R88 and the resistor R51, the 5th pin, the 6th pin, the 7th pin and the 8th pin of the chip U11 are all connected between the resistor R88 and the resistor R51, the other end of the chip U10 is connected between the resistor R89 and the resistor R52, the 1st pin, the 2nd pin, the 3rd pin and the 4th pin of the chip U11 are all connected between the resistor R88 and the resistor R51. The common-mode inductor FL1, the rectifier bridge BD2 and the common-mode inductor FL2 are connected in series in sequence. The capacitor C4 is connected between the two DC output pins of the rectifier bridge BD2. The live input pin of the common-mode inductor FL2, the capacitor C53, the capacitor C66 and the neutral input pin of the common-mode inductor FL2 are connected in series in sequence. The live output pin of the common-mode inductor FL2, the diode D1, the varistor TH1 and the drain of the MOS tube Q5 are connected in series in sequence. The iron core inductor L1 and the diode D6 are connected in series and then in parallel with the diode D1. The capacitor C3 is connected between the live output pin and the neutral output pin of the common-mode inductor FL2. The positive terminal of the polarized capacitor C1 is connected in series with the positive terminal of the polarized capacitor C1. The gate of the MOS transistor Q5 is connected between the varistor TH1 and the drain of the MOS transistor Q5. The negative electrode of the polarized capacitor C1 is grounded. The resistor R10 and the resistor R11 are connected in parallel, and one end is connected to the neutral line output pin of the common-mode inductor FL2. The other end of the resistor R10 and the resistor R11 are connected in parallel between the polarized capacitor C1 and ground. The gate of the MOS transistor Q5, the resistor R30, the primary winding of the transformer T1, and the positive electrode of the diode D10 are connected in series in sequence. The source of the MOS transistor Q5 is connected between the resistor R30 and the primary winding of the transformer T1. The negative electrode of the diode D10 is connected between the varistor TH1 and the drain of the MOS transistor Q5.

2. The computer power supply circuit according to claim 1, wherein: The power factor correction circuit includes a VDD pin, a correction circuit, and a drive circuit. The neutral line output pin of the common-mode inductor FL2 and the output pin of the core inductor L1 are both connected to the correction circuit. The correction circuit and the drive circuit are both connected to the VDD pin. The correction circuit is connected to the drive circuit. The drive circuit is connected to the gate of the MOS transistor Q5 and the primary winding of the transformer T1.

3. The computer power supply circuit according to claim 1, wherein: The filtering and rectifying circuit further includes: a diode D25, diodes D38-D39, a capacitor C64, a capacitor C26, a polarized capacitor C32, a polarized capacitor C37, a polarized capacitor C39, a resistor R100, a resistor R115, a coupling inductor L12, and an iron core inductor L9. The two ends of the secondary winding of the transformer T1 are connected to the positive electrode of the diode D38 and the ground respectively. The negative electrode of the diode D38, the primary winding of the coupling inductor L12, the iron core inductor L9, and the 12V positive output terminal are connected in series in sequence. The positive electrode and negative electrode of the diode D39 are grounded and the negative electrode of the diode D38 respectively. One end of the capacitor C64, the capacitor C26 and the polarized capacitor C32 are all connected between the primary winding of the coupling inductor L12 and the iron core inductor L9. The other ends of the capacitor C64, the capacitor C26 and the polarized capacitor C32 are all grounded. One end of the polarized capacitor C37 and the resistor R100 are both connected between the iron core inductor L9 and the 12V positive output terminal. The other ends of the polarized capacitor C37 and the resistor R100 are both grounded. The positive electrode of the diode D25 is connected to the negative output terminal of 12V, the negative electrode of the diode D25, the secondary winding of the coupled inductor L12 and the ground are connected in series in sequence, and one end of the polarized capacitor C39 and the resistor R115 are both connected between the positive electrode of the diode D25 and the negative output terminal of 12V, and the other ends of the polarized capacitor C39 and the resistor R115 are both grounded.

4. The computer power supply circuit according to claim 3, wherein: The filtering and rectifying circuit further includes: capacitors C52 to C53, resistors R40, R44, R56 and R64. The capacitor C53 and the resistor R64 are connected in series and then in parallel to the diode D38. The resistor R56 is connected in parallel to the resistor R64. The capacitor C52 and the resistor R44 are connected in series and then in parallel to the diode D39. The resistor R40 is connected in parallel to the resistor R44.

5. The computer power supply circuit according to claim 2, wherein: The correction circuit includes: chip U1, iron core inductor L1, transistor Q3, transistor Q6, diode D8, diode D11, diode D17, diode D22, diode D38, resistors R2-R4, resistors R6-R9, resistor R12, resistor R17, resistor R19, resistor R21, resistor R27, resistor R39, capacitor C2, capacitor C8, capacitor C13, capacitor C19, capacitor C110 and MOS tube Q2, the neutral line output pin of the common mode inductor FL2, resistor R27 and the I The sense pins are connected in series in sequence. The Isense pin of the chip U1, the diode D11, the diode D22, the diode D38 and the ground are connected in series in sequence. The capacitor C8 is connected between the Isense pin of the chip U1 and the ground. The VDD pin, the diode D17, the transistor Q6 and the transistor Q3 are connected in series in sequence with the ground. The output pin of the core inductor L1 is connected to the drain of the MOS tube Q2. The source of the MOS tube Q2 is grounded. The resistor R19 is connected between the gate and source of the MOS tube Q2. The gate of the MOS tube Q2 is connected to the ground. The base, resistor R39 and one end of resistor R17 are connected in series in sequence. The other end of the resistor R17 is connected between transistor Q6 and transistor Q3. The diode D8 is connected in parallel with the resistor R17. One end of the resistor R21 is connected to the base of transistor Q6 and the base of transistor Q3. The other end of the resistor R21 is connected to the PFC pin of chip U1. One end of the capacitor C110 is connected between diode D17 and transistor Q6. The other end of the capacitor C110 is grounded. The Iac pin of chip U1, resistor R12, resistor R8, and resistor R4 The live wire input pin of the common-mode inductor FL2 is connected in series in sequence. The capacitor C13 is connected between the Iac pin of the chip U1 and the ground. The Vrms pin of the chip U1, the resistor R6, the resistor R9, the resistor R7, the resistor R3 and the live wire input pin of the common-mode inductor FL2 are connected in series in sequence. One end of the resistor R2 and the capacitor C2 are both connected between the resistor R6 and the resistor R9, and the other end of the resistor R2 and the capacitor C2 are both grounded. One end of the capacitor C19 is connected between the Vrms pin of the chip U1 and the resistor R6, and the other end of the capacitor C19 is grounded.

6. The computer power supply circuit according to claim 2, wherein: The driving circuit includes: chip U13, resistor R1, resistor R14, resistor R16, resistor R31, resistors R36-R38, resistor R41, resistor R50, resistor R90, resistor R99, resistor R101, MOS tube Q1, diode D7, diode D9, diode D12, diode D19, capacitors C107-C109 and voltage stabilizing diode ZD4, the PWM pin of the chip U1, resistor R37 and resistor R90 are connected in series in sequence, the resistor R90 is connected to the Hin pin and Lin pin of the chip U13, the The DClimit pin of the chip U1, the resistor R41, and the source of the MOS transistor Q1 are connected in series in sequence. The two ends of the resistor R1 are connected to the source of the MOS transistor Q1 and the ground respectively. The two ends of the resistor R14 are connected to the gate and source of the MOS transistor Q1 respectively. The LO pin of the chip U13, the resistor R16, the resistor R38, and the gate of the MOS transistor Q1 are connected in series in sequence. The positive electrode of the diode D7 is connected between the resistor R16 and the resistor R38. The negative electrode of the diode D7 is connected between the LO pin of the chip U13 and the resistor R16. The drain is connected between the primary winding of the transformer T1 and the diode D10. The HO pin of the chip U13, the resistor R31, the resistor R36 and the gate of the MOS tube Q5 are connected in series in sequence. The anode of the diode D12 is connected between the resistor R31 and the resistor R36. The cathode of the diode D12 is connected between the HO pin of the chip U13 and the resistor R31. One end of the diode D9 is connected between the source of the MOS tube Q5 and the primary winding of the transformer T1. The other end of the diode D9 is grounded. The VDD pin, the resistor R99, the diode D19, resistor R101 and the VB pin of chip U13 are connected in series in sequence. After the voltage regulator diode ZD4 and capacitor C107 are connected in parallel, their two ends are connected to the positive electrode of diode D19 and the GND pin of chip U13 respectively. The VCC pin of chip U13 is connected to the positive electrode of diode D19. The two ends of capacitor C109, capacitor C108 and resistor R94 are connected to the VB pin and Vs pin of chip U13 respectively. One end of the resistor R50 is connected between resistor R30 and the primary winding of transformer T1, and the other end of the resistor R50 is connected to the Vs pin of chip U13.

7. The computer power supply circuit according to claim 1, wherein: The correction circuit also includes: a capacitor C11, a resistor R18, a resistor R20, a resistor R29, and a resistor R32. The Vfb pin of the chip U1, the resistor R29, the resistor R20, and one end of the resistor R18 are connected in series in sequence. One end of the resistor R32 is connected between the Vfb pin of the chip U1 and the resistor R29, and the other end of the resistor R32 is grounded. The two ends of the capacitor C11 are respectively connected to the Vfb pin of the chip U1 and the ground.

8. The computer power supply circuit according to claim 7, wherein: It also includes a 5VSB circuit, which is connected to the switching circuit. The 5VSB circuit includes a transformer T3, a chip U9, a voltage regulator chip U7, a resistor R18, resistors R24 to R26, a resistor R28, resistors R34 to R35, a resistor R46, a resistor R49, a resistor R58, a resistor R60, a resistor R62, a resistor R67, a resistor R95, a diode D13, a diode D14, a diode D15, a diode D20, a diode D32, a diode D33, a diode D37, a diode D39, a Zener diode ZD3, a Zener diode ZD6, a Zener diode ZD9, a Zener diode ZD10, a capacitor C4, a capacitor C10, a capacitor C17, and a capacitor C18 , capacitor C30, capacitor C49, capacitor C50, capacitor C56, capacitor C67, polarized capacitor C16, polarized capacitor C14, polarized capacitor C29, polarized capacitor C42, iron core inductor L5, phototransistor V1, light emitting diode, 5VSB output port, 5VSB1 output port, the transformer T3 is provided with a first primary winding, a second primary winding and a third secondary winding, the live wire terminal L of the socket, the diode D33 and the input end of the resistor R35 are connected in series in sequence, the neutral wire terminal N of the socket, the diode D32 and the input end of the resistor R35 are connected in series in sequence, the resistor R35, the resistor R34, the resistor R26 and the AC input pin of the chip U9 are connected in sequence, the Dr of the chip U9 The ain pin, the first primary winding of the transformer T3 and the other end of the resistor R18 are connected in series in sequence. The positive poles of the Zener diode ZD9 and the diode D13 are connected to the two ends of the first primary winding of the transformer T3 respectively. The negative poles of the Zener diode ZD9 and the diode D13 are connected to one end of the capacitor C4. The other end of the capacitor C4 is connected between the first primary winding of the transformer T3 and the resistor R18. One end of the second primary winding of the transformer T3 is grounded. The other end of the second primary winding of the transformer T3, the resistor R28, the diode D14, the diode D15 and the VDD pin of the chip U9 are connected in series in sequence. The positive pole of the Zener diode ZD6 is grounded. The negative pole of the Zener diode ZD6, the resistor R67 and the V The DD pins are connected in series in sequence, one end of the capacitor C17, the negative electrode of the polarized capacitor C16 and the negative electrode of the polarized capacitor C14 are all grounded, the positive electrode of the polarized capacitor C16 and the other end of the capacitor C17 are all connected between the diode D15 and the VDD pin of the chip U9, the positive electrode of the polarized capacitor C14 is connected between the diode D14 and the diode D15, the phototransistor V1, the capacitor C10 and the voltage-stabilizing diode ZD3 are all connected between the FB pin of the chip U9 and the ground, the capacitor C18 and the resistor R24 are all connected between the AC input pin of the chip U9 and the ground, the resistor R95 and the resistor 25 are connected in parallel, the two ends of which are respectively connected to the CS pin of the chip U9 and the ground, and one end of the third secondary winding of the transformer is grounded.The other end of the third secondary winding of the transformer, the diode D20, the core inductor L5 and the 5VSB output port are connected in series in sequence, the 5VSB1 output port is connected between the diode D20 and the core inductor L5, one end of the polarized capacitor C42 is connected between the core inductor L5 and the 5VSB output port, the other end of the polarized capacitor C42 is grounded, the cathode of the diode D20, the resistor R46, the voltage regulator chip U7 and the ground are connected in series in sequence, the resistor R49 is connected in series with the light emitting diode and then in parallel with the resistor R46, the diode D20, the core inductor L5, the resistor R62, the resistor R60 and the ground are connected in series in sequence, one end of the capacitor C56 is connected Connected between resistor R46 and voltage regulator chip U7, the other end of capacitor C56 is connected between resistor R62 and resistor R60, the resistor R58 is connected in series with capacitor C30 and then in parallel with capacitor C56, the diode D39 is connected in series with capacitor C67 and then in parallel with resistor R62, the diode D37 and diode D39 are connected in anti-parallel, the two ends of capacitor C49 and capacitor C50 are connected in parallel, respectively, the cathode of diode D20 and ground, the voltage regulator diode ZD10 is connected between the cathode of diode D20 and the core inductor L5, and the other end of the voltage regulator diode ZD10 is grounded, and the polarized capacitor C29 is connected in parallel with the voltage regulator diode ZD10.

9. The computer power supply circuit according to claim 8, wherein: The 5VSB circuit also includes a phototransistor V2, a resistor R33, a transistor Q9, a diode D24, a voltage-stabilizing diode ZD2, the base of the transistor Q9, a VCC output port, and a VDD output port. The collector of the transistor Q9 is connected between the diode D14 and the diode D15. The collector of the transistor Q9, the phototransistor V2, the resistor R33, and the base of the transistor Q9 are connected in series in sequence. The emitter of the transistor Q9, the diode D24, and the VDD output port are connected in series in sequence. The emitter of the transistor Q9 is connected to the VCC output port. The base of the transistor Q9, the voltage-stabilizing diode ZD2, and the ground are connected in series in sequence.

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