GPU power supply circuit with current protection function

Abstract

The invention provides a GPU power supply circuit with a current protection function, and the circuit is characterized in that a first connector J71 is connected with the input end of a current protection circuit through a cable, and the output end of the current protection circuit is connected with a second connector J72 through a cable; the current protection circuit comprises a power supply chip, a first protection circuit and a second protection circuit, the first protection circuit and the second protection circuit are used for limiting large current impact, the first protection circuit is arranged between the first connector J71 and the power supply chip, and the second protection circuit is arranged between the second connector J72 and the power supply chip. The 24 pin of the power supply chip is connected with one end of a current control resistor PR826 used for controlling the maximum current passing through the chip. According to the invention, the effective protection time of a GPU power path and a chip can be greatly shortened, and the risks of GPU card burning and mainboard burning caused by short circuit and overcurrent are reduced to the greatest extent.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of server GPU, and particularly relates to a GPU power supply circuit with current protection function. BACKGROUND

[0002] With the rise of AI large model application, more and more server products need to adapt to high-power GPU cards to improve the system performance of the whole machine to meet the application requirements. Under this background, for the whole machine power supply design of the server manufacturer, two problems need to be solved, namely, large current power supply and GPU fault protection design. In order to be compatible with the power supply requirements of multiple GPU cards, the GPU power supply usually adopts a standard power cable, and the main function of the cable is to support the GPU power supply current demand. However, when the GPU card fails, such as device failure, mechanical damage, and short circuit and overcurrent problems caused by illegal operation, the power supply protection chip on the mainboard is often used for protection. When the fault condition expands rapidly, the power supply chip on the mainboard often cannot close the power supply channel in time, resulting in GPU card burnout and damage, and even affecting multiple GPU cards on the mainboard, and the customer suffers serious losses. SUMMARY

[0003] The application aims to provide a GPU power supply circuit with current protection function, and aims to solve the problem of insufficient current protection measures of the existing GPU power supply circuit for chips.

[0004] The application is implemented as follows: a GPU power supply circuit with current protection function, comprising a first connector J71, a second connector J72 and a current protection circuit, the first connector J71 is connected with the input end of the current protection circuit through a cable, the output end of the current protection circuit is connected with the second connector J72 through a cable, the current protection circuit comprises a power supply chip, a first protection circuit and a second protection circuit for limiting large current impact, the first protection circuit is arranged between the first connector J71 and the power supply chip, the second protection circuit is arranged between the second connector J72 and the power supply chip, and the 24th pin of the power supply chip is connected with one end of a current control resistance PR826 for controlling the maximum current passing through the chip.

[0005] A further technical solution of the present invention is as follows: the first protection circuit includes a Zener diode PD3, a resistor PR627, a capacitor PC747, and a capacitor PC748. The negative terminal of the Zener diode PD3 is connected to the output terminal of the first connector J71, and the negative terminal of the Zener diode PD3 is connected to the input pin of the power supply chip. One end of the resistor PR627 is connected to the positive terminal of the Zener diode PD3, and the other end of the resistor PR627 is grounded. One end of the capacitor PC747 is connected to the negative terminal of the Zener diode PD3, and the other end of the capacitor PC747 is connected to the other end of the resistor PR627. One end of the capacitor PC748 is connected to the negative terminal of the Zener diode PD3, and the other end of the capacitor PC748 is connected to the other end of the resistor PR627.

[0006] A further technical solution of the present invention is as follows: the second protection circuit includes a Schottky diode PD4, a capacitor PC749, a capacitor PC750, and a capacitor PC751. The positive terminal of the Schottky diode PD4 is grounded, the negative terminal of the Schottky diode PD4 is connected to the output pin of the power supply chip, the negative terminal of the Schottky diode PD4 is connected to the input terminal of the second connector J72, and the capacitors PC749, PC750, and PC751 are all connected in parallel across the two ends of the Schottky diode PD4.

[0007] A further technical solution of the present invention includes a capacitor PC755, a resistor PR630, and a resistor PR631. The capacitor PC755 is connected in parallel across the current-controlling resistor PR826. One end of the resistor PR630 is connected to pin 17 of the power supply chip, and the other end of the resistor PR630 is connected to the other end of the current-controlling resistor PR826. One end of the resistor PR631 is connected to pin 23 of the power supply chip, and the other end of the resistor PR631 is connected to the other end of the current-controlling resistor PR826. The other end of the current-controlling resistor PR826 is grounded.

[0008] A further technical solution of the present invention is that pins 1-6 of the first connector J71 are connected to the input pins of the power chip.

[0009] A further technical solution of the present invention is that pins 1-6 of the second connector J72 are connected to the output pins of the power chip.

[0010] A further technical solution of the present invention is: when the maximum current through the power chip exceeds the current protection value set by the current control resistor PR826, the power chip shuts off the current and issues an overcurrent protection alarm through pin 3.

[0011] A further technical solution of the present invention is: when the power supply circuit is in an abnormal operating range, the power chip cuts off the current and sends a circuit fault signal through pin 6.

[0012] Further technical solutions of the present application are: further comprising resistance PR632, resistance PR633, capacitor PC757 and capacitor PC758, one end of the resistance PR632 and one end of the capacitor PC758 are connected with the 18th pin of the power supply chip, one end of the resistance PR633 and one end of the capacitor PC757 are connected with the 22nd pin of the power supply chip, the other end of the resistance PR632, the other end of the resistance PR633, the other end of the capacitor PC758 and the other end of the capacitor PC757 are grounded.

[0013] The beneficial effects of the present application are: the present application can greatly shorten the GPU power supply path and the effective protection time of the chip, and minimize the risk of GPU card burning and mainboard burning caused by short circuit and overcurrent. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is the specific circuit connection diagram of the present application. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below in combination with the drawings and examples.

[0016] Figure 1 A GPU power supply circuit with current protection function provided by the present application is shown, which comprises a first connector J71, a second connector J72 and a current protection circuit, the first connector J71 is connected with the input end of the current protection circuit through a cable, the output end of the current protection circuit is connected with the second connector J72 through a cable, the current protection circuit comprises a power supply chip (element PU54 in Figure 1 ), a first protection circuit and a second protection circuit for limiting large current impact, the first protection circuit is arranged between the first connector J71 and the power supply chip, the second protection circuit is arranged between the second connector J72 and the power supply chip, and the 24th pin of the power supply chip is connected with one end of a current control resistance PR826 for controlling the maximum current passing through the chip.

[0017] Preferably, the first protection circuit comprises a zener diode PD3, a resistor PR627, a capacitor PC747 and a capacitor PC748, the negative pole of the zener diode PD3 is connected with the output end of the first connector J71, the negative pole of the zener diode PD3 is connected with the input pin of the power supply chip, one end of the resistor PR627 is connected with the positive pole of the zener diode PD3, the other end of the resistor PR627 is grounded, one end of the capacitor PC747 is connected with the negative pole of the zener diode PD3, the other end of the capacitor PC747 is connected with the other end of the resistor PR627, one end of the capacitor PC748 is connected with the negative pole of the zener diode PD3, the other end of the capacitor PC748 is connected with the other end of the resistor PR627.

[0018] Preferably, the second protection circuit comprises a Schottky diode PD4, a capacitor PC749, a capacitor PC750 and a capacitor PC751, the positive pole of the Schottky diode PD4 is grounded, the negative pole of the Schottky diode PD4 is connected with the output pin of the power supply chip, the negative pole of the Schottky diode PD4 is connected with the input end of the second connector J72, the capacitor PC749, the capacitor PC750 and the capacitor PC751 are all connected in parallel across the Schottky diode PD4.

[0019] Preferably, it further comprises a capacitor PC755, a resistor PR630 and a resistor PR631, the capacitor PC755 is connected in parallel across the current control resistor PR826, one end of the resistor PR630 is connected with the 17 pin of the power supply chip, the other end of the resistor PR630 is connected with the other end of the current control resistor PR826, one end of the resistor PR631 is connected with the 23 pin of the power supply chip, the other end of the resistor PR631 is connected with the other end of the current control resistor PR826, the other end of the current control resistor PR826 is grounded. Preferably, it further comprises a resistor PR632, a resistor PR633, a capacitor PC757 and a capacitor PC758, one end of the resistor PR632 and one end of the capacitor PC758 are both connected with the 18 pin of the power supply chip, one end of the resistor PR633 and one end of the capacitor PC757 are both connected with the 22 pin of the power supply chip, the other end of the resistor PR632, the other end of the resistor PR633, the other end of the capacitor PC758 and the other end of the capacitor PC757 are all grounded. Through the above circuit design, the accuracy of the current measured by the power supply chip PU54 is controlled, and the temperature generated by the current passing through the power supply chip PU54 is controlled, thereby ensuring that the power supply chip quickly responds to overcurrent protection, and improving the reliability of the chip working in the environment temperature, wherein the temperature control is a function of the power supply chip PU54.

[0020] Preferably, the 1-6 pins of the first connector J71 are connected with the input pin of the power supply chip. The 1-6 pins of the first connector J71 constitute the output end of the first connector J71.

[0021] Preferably, the 1-6 pins of the second connector J72 are connected with the output pins of the power supply chip. The 1-6 pins of the second connector J72 constitute the input end of the second connector J72.

[0022] Preferably, when the maximum current passing through the power supply chip exceeds the current protection value set by the current control resistor PR826, the power supply chip cuts off the current and sends an overcurrent protection alarm through the 3 pin.

[0023] Preferably, when the power supply circuit is in an abnormal working range, the power supply chip cuts off the current and sends a circuit failure signal through the 6 pin.

[0024] The application provides a GPU power supply circuit with current protection function, which not only supports current conduction function, but also supports system failure protection function. By adding a current protection function chip on the GPU power supply cable, the problem of GPU card burning and motherboard burning caused by short circuit and overcurrent in fault scenarios can be solved. The application can greatly shorten the GPU power supply path and the effective protection time of the chip, and minimize the risk of GPU card burning and motherboard burning caused by short circuit and overcurrent.

[0025] The current protection circuit adopts MPS power supply chip MP5991, and the P12V input power supply is normal to ensure the normal working of the protection circuit. As shown in the figure, Figure 1 The mainboard current enters the left cable line from the first connector J71, passes through the power supply chip MP5991 with current protection function and the first protection circuit, is output from the chip to the right cable line, passes through the second protection circuit into the second connector J72, and provides current with current limiting protection to the load device and components. The stabilizing diode PD3 can prevent the stress impact of the input 12V large current surge on the power supply chip MP5991, and the capacitor PC747 and the capacitor PC748 at the input end of the chip can effectively remove high-frequency voltage fluctuations. The output end provides reverse clamping of the output end voltage through the Schottky diode PD4, avoiding the breakdown of the device caused by load voltage fluctuations. The 24 pin of the power supply chip provides the function of modulating the current value, and the maximum current passing through the power supply chip can be accurately controlled by changing the resistance value of the current control resistor PR826.

[0026] The 3 pin and the 6 pin of the power supply chip can provide overcurrent protection alarm and fault reporting function. When the maximum current passing through the power supply chip exceeds the current protection value set by the current control resistor PR826, the chip cuts off the current and sends an overcurrent protection alarm through the 3 pin. When the input voltage of the power supply protection circuit abnormally fluctuates, the output current is too large to protect, or the circuit is short-circuited and the temperature of the chip exceeds the normal working range, the chip cuts off the current and sends a circuit failure reporting signal through the 6 pin, avoiding the damage of the circuit failure to the load device and components.

[0027] In the application, the circuit design of adding current protection function on the GPU power cable makes the power cable increase the current protection function, greatly shortens the GPU power path and the effective protection time of the chip, and maximally reduces the destructive influence of the load end equipment due to short circuit, overcurrent and other serious fault problems.

[0028] The above merely describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A GPU power supply circuit with current protection function, characterized in that, The first connector J71, the second connector J72 and the current protection circuit are included, the first connector J71 is connected with the input end of the current protection circuit through the cable, the output end of the current protection circuit is connected with the second connector J72 through the cable, the current protection circuit includes the power supply chip, the first protection circuit and the second protection circuit for limiting the large current impact, the first protection circuit is arranged between the first connector J71 and the power supply chip, the second protection circuit is arranged between the second connector J72 and the power supply chip, and one end of the 24 pin of the power supply chip is connected with the current control resistance PR826 for controlling the maximum current passing through the chip.

2. The GPU power supply circuit with current protection function according to claim 1, characterized in that, The first protection circuit includes the voltage stabilizing diode PD3, the resistance PR627, the capacitor PC747 and the capacitor PC748, the negative electrode of the voltage stabilizing diode PD3 is connected with the output end of the first connector J71, the negative electrode of the voltage stabilizing diode PD3 is connected with the input pin of the power supply chip, one end of the resistance PR627 is connected with the positive electrode of the voltage stabilizing diode PD3, the other end of the resistance PR627 is grounded, one end of the capacitor PC747 is connected with the negative electrode of the voltage stabilizing diode PD3, the other end of the capacitor PC747 is connected with the other end of the resistance PR627, one end of the capacitor PC748 is connected with the negative electrode of the voltage stabilizing diode PD3, and the other end of the capacitor PC748 is connected with the other end of the resistance PR627.

3. The GPU power supply circuit with current protection function according to claim 1, characterized in that, The second protection circuit includes the Schottky diode PD4, the capacitor PC749, the capacitor PC750 and the capacitor PC751, the positive electrode of the Schottky diode PD4 is grounded, the negative electrode of the Schottky diode PD4 is connected with the output pin of the power supply chip, the negative electrode of the Schottky diode PD4 is connected with the input end of the second connector J72, and the capacitor PC749, the capacitor PC750 and the capacitor PC751 are all connected in parallel across the Schottky diode PD4.

4. The GPU power supply circuit with current protection function according to claim 1, characterized in that, The capacitor PC755, the resistance PR630 and the resistance PR631 are further included, the capacitor PC755 is connected in parallel across the current control resistance PR826, one end of the resistance PR630 is connected with the 17 pin of the power supply chip, the other end of the resistance PR630 is connected with the other end of the current control resistance PR826, one end of the resistance PR631 is connected with the 23 pin of the power supply chip, the other end of the resistance PR631 is connected with the other end of the current control resistance PR826, and the other end of the current control resistance PR826 is grounded.

5. The GPU power supply circuit with current protection function according to claim 1, characterized in that, The 1-6 pin of the first connector J71 is connected with the input pin of the power supply chip.

6. The GPU power supply circuit with current protection function according to claim 1, characterized in that, The 1-6 pin of the second connector J72 is connected with the output pin of the power supply chip.

7. The GPU power supply circuit with current protection function according to claim 1, characterized in that, When the maximum current passing through the power supply chip exceeds the current protection value set by the current control resistance PR826, the power supply chip cuts off the current and sends the overcurrent protection alarm through the 3 pin.

8. The GPU power supply circuit with current protection function according to claim 1, characterized in that, When the power supply circuit is in the abnormal working range, the power supply chip cuts off the current and sends the circuit failure signal through the 6 pin.

9. The GPU power supply circuit with current protection function according to claim 1, characterized in that, The resistor PR632, the resistor PR633, the capacitor PC757 and the capacitor PC758 are also included, one end of the resistor PR632 and one end of the capacitor PC758 are connected with the 18 pin of the power supply chip, one end of the resistor PR633 and one end of the capacitor PC757 are connected with the 22 pin of the power supply chip, the other end of the resistor PR632, the other end of the resistor PR633, the other end of the capacitor PC758 and the other end of the capacitor PC757 are grounded.

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