Multi-graphics card terminal anomaly detection protection circuit

Abstract

The invention discloses a multi-graphics card terminal anomaly detection protection circuit, which relates to the technical field of graphics card protection, and comprises a power supply adjusting module used for multi-path high-frequency transformation processing; the first output control module is used for rectification, electric energy transmission control and electric energy filtering and supplying power to the first display card; the second output control module is used for rectifying, transmitting electric energy, filtering the electric energy and supplying power to a second display card; the third output control module is used for rectification, electric energy transmission control and electric energy filtering and supplying power to a third display card; the sampling switching module is used for switching a signal transmission path according to the signal state detected by the anomaly detection module; the electric energy feedback module is used for detecting voltage change; and the abnormity detection module is used for overvoltage detection. The multi-display-card terminal anomaly detection protection circuit can disconnect electric energy, switch sampling objects and continue to maintain power supply work of the power supply control module when the electric energy of the display card terminal is abnormal, display card faults are avoided, and the working efficiency of multiple display cards is improved.

Description

Technical Field

[0001] The invention relates to the technical field of graphics card protection, in particular to an abnormality detection protection circuit for a multi-graphics card terminal. Background Art

[0002] Graphics card is one of the most basic configuration and most important accessories of a computer. As an important component of smart devices, it is a device for converting digital-to-analog signals and is responsible for outputting and displaying graphics. In order to improve data processing capabilities, smart devices can be equipped with multiple graphics cards. In order to facilitate power supply control of multi-graphics card terminals, multi-graphics card terminals in the prior art generally use independent power supplies that can provide multi-channel voltage-stabilized power supply. In actual use of independent power supplies, a certain power supply port may have power supply abnormalities, which may cause the graphics card terminal to fail to work normally or even damage the graphics card terminal. In addition, independent power supplies often use switching power supply circuits. If the main output port has power abnormalities, the remaining power supply ports will also have power supply abnormalities. Therefore, there is room for improvement. Summary of the invention

[0003] The embodiment of the present invention provides a multi-graphics card terminal abnormality detection protection circuit to solve the problems raised in the above background technology.

[0004] According to an embodiment of the present invention, a multi-graphics card terminal abnormality detection protection circuit is provided, comprising: a power supply adjustment module, a first output control module, a second output control module, a third output control module, an electric energy feedback module, an abnormality detection module and a sampling switching module;

[0005] A power supply regulating module, connected to the power feedback module, for receiving direct current power, and performing multi-channel high-frequency voltage transformation and regulating processing on the direct current power and outputting the first power upon receiving the feedback signal output by the power feedback module;

[0006] a first output control module, connected to the power regulation module and the abnormality detection module, for rectifying the first electric energy and transmitting the rectified electric energy, filtering the transmitted electric energy and providing the second electric energy for the connected first graphics card, and stopping the electric energy transmission when receiving the first abnormality signal output by the abnormality detection module;

[0007] A second output control module, connected to the power regulation module and the abnormality detection module, is used to rectify the first electric energy and transmit the rectified electric energy, filter the transmitted electric energy and provide the third electric energy for the connected second graphics card, and stop the electric energy transmission when receiving the second abnormality signal output by the abnormality detection module;

[0008] a third output control module, connected to the power regulation module and the abnormality detection module, for rectifying the first electric energy and transmitting the rectified electric energy, filtering the transmitted electric energy and providing fourth electric energy for the connected third graphics card, and stopping the electric energy transmission when receiving the third abnormality signal output by the abnormality detection module;

[0009] a sampling switching module, connected to the first output control module, the second output control module, the third output control module, the abnormality detection module and the electric energy feedback module, and configured to transmit the second electric energy to the electric energy feedback module, transmit the third electric energy to the electric energy feedback module upon receiving the first abnormality signal output by the abnormality detection module, and transmit the fourth electric energy to the electric energy feedback module upon receiving the first abnormality signal and the second abnormality signal output by the abnormality detection module;

[0010] An electric energy feedback module is used to set a voltage threshold, isolate and divide the received second electric energy, third electric energy or fourth electric energy and compare it with the voltage threshold, and output a feedback signal when the voltage of the second electric energy, third electric energy or fourth electric energy changes;

[0011] The abnormality detection module is used to set an overvoltage threshold and self-lock to output a first abnormal signal when the second electrical energy is greater than the overvoltage threshold, self-lock to output a second abnormal signal when the third electrical energy is greater than the overvoltage threshold, and self-lock to output a third abnormal signal when the fourth electrical energy is greater than the overvoltage threshold.

[0012] As a further solution of the present invention: the power regulation module includes a power interface, a first capacitor, a second capacitor, a first resistor, a first regulator, a first diode, a second diode and a first transformer;

[0013] Preferably, the first end of the power interface is connected to one end of the first capacitor, the anode of the first diode and the first end of the primary side of the first transformer, the cathode of the first diode is connected to the cathode of the second diode, the anode of the second diode is connected to the second end of the primary side of the first transformer and the D end of the first regulator, the S end of the first regulator is connected to the other end of the first capacitor and the second end of the power interface and is connected to the C end of the first regulator and the power feedback module through the second capacitor and the first resistor in sequence, and the first secondary side, the second secondary side, the third secondary side and the fourth secondary side of the first transformer are respectively connected to the first output control module, the second output control module, the third output control module and the power feedback module.

[0014] As a further solution of the present invention: the first output control module includes a sixth diode, a seventh capacitor, a fourth resistor, a third power tube, a third switch tube, a first inductor, an eighth capacitor and a first interface;

[0015] Preferably, the anode of the sixth diode is connected to the first end of the first secondary side of the first transformer, the cathode of the sixth diode is connected to the drain of the third power tube and one end of the seventh capacitor and is connected to the gate of the third power tube and the collector of the third switching tube through the fourth resistor, the source of the third power tube is connected to the first end of the first inductor, the second end of the first inductor is connected to the first end of the first interface and one end of the eighth capacitor, the emitter of the third switching tube is connected to the other end of the seventh capacitor, the second end of the first interface, the other end of the eighth capacitor and the second end of the first secondary side of the first transformer, and the base of the third switching tube is connected to the abnormality detection module.

[0016] As a further solution of the present invention: the abnormality detection module includes a ninth resistor, an eighth diode, a tenth resistor, a ninth diode, a tenth diode, a first logic chip and a first power supply;

[0017] Preferably, the cathode of the eighth diode is connected to the first end of the first interface through a ninth resistor, the anode of the eighth diode is connected to the anode of the ninth diode and connected to the second end of the first interface through a tenth resistor, the cathode of the ninth diode is connected to the cathode of the tenth diode and the A end of the first logic chip, the B end of the first logic chip is connected to the first power supply, and the Y end of the first logic chip is connected to the anode of the tenth diode, the base of the third switch tube and the sampling switching module.

[0018] As a further solution of the present invention: the second output control module includes a fifth diode, a fifth capacitor, a third resistor, a second power tube, a second switch tube, a second inductor, a sixth capacitor and a second interface; the abnormality detection module includes a second detection device;

[0019] Preferably, the anode of the fifth diode is connected to the first end of the second secondary side of the first transformer, the cathode of the fifth diode is connected to the drain of the second power tube and one end of the fifth capacitor and is connected to the gate of the second power tube and the collector of the second switching tube through the third resistor, the source of the second power tube is connected to the first end of the second inductor, the second end of the second inductor is connected to one end of the sixth capacitor, the first end of the second detection device and the first end of the second interface, the other end of the fifth capacitor is connected to the emitter of the second switching tube, the other end of the sixth capacitor, the second end of the second interface, the second end of the second detection device and the second end of the second secondary side of the first transformer, and the third end of the second detection device is connected to the sampling switching module.

[0020] As a further solution of the present invention: the third output control module includes a third diode, a third capacitor, a second resistor, a first switch tube, a first power tube, a third inductor, a fourth capacitor and a third interface; the abnormality detection module includes a third detection device;

[0021] Preferably, the anode of the third diode is connected to the first end of the third secondary side of the first transformer, the cathode of the third diode is connected to the drain of the first power tube and one end of the third capacitor and is connected to the gate of the first power tube and the collector of the first switching tube through the second resistor, the source of the first power tube is connected to the first end of the third inductor, the second end of the third inductor is connected to one end of the fourth capacitor, the first end of the third interface and the first end of the third detection device, the other end of the third capacitor is connected to the emitter of the first switching tube, the other end of the fourth capacitor, the second end of the third interface, the second end of the third detection device and the second end of the third secondary side of the first transformer, and the third end of the third detection device is connected to the sampling switching module.

[0022] As a further solution of the present invention: the electric energy feedback module includes a seventh diode, a ninth capacitor, a first optical coupler, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a first controllable voltage stabilizing source, a tenth capacitor and an eleventh capacitor;

[0023] Preferably, the anode of the seventh diode is connected to the first end of the fourth secondary side of the first transformer, the cathode of the seventh diode is connected to one end of the ninth capacitor and the third end of the first optocoupler, the fourth end of the first optocoupler is connected to the C end of the first regulator, the first end of the first optocoupler is connected to the sampling switching module, the second end of the first optocoupler is connected to the cathode of the first controllable voltage-stabilizing source, one end of the eleventh capacitor and the first end of the sixth resistor through the fifth resistor, the second end of the sixth resistor is connected to the other end of the eleventh capacitor, the control end of the first controllable voltage-stabilizing source and one end of the eighth resistor through the seventh resistor, the other end of the eighth resistor is connected to the anode of the first controllable voltage-stabilizing source, the second end of the third interface, the second end of the second interface and the second end of the first interface and is connected to the other end of the ninth capacitor, the second end of the fourth secondary side of the first transformer and the second end of the power supply interface through the tenth capacitor.

[0024] As a further solution of the present invention: the sampling switching module includes a first analog switch, a second analog switch, a second power supply, an eleventh resistor, a fourth switch tube, a second logic chip, a third logic chip, a first inverter, a second inverter and a fifth switch tube;

[0025] Preferably, the IN1 terminal and the IN2 terminal of the first analog switch are respectively connected to the first end and the second end of the first inductor, the CTRL1 terminal and the CTRL2 terminal of the first analog switch are both connected to the collector of the fourth switch tube and connected to the second power supply through the eleventh resistor, the base of the fourth switch tube is connected to the Y terminal of the first logic chip, the A terminal of the second logic chip and the A terminal of the third logic chip, the B terminal of the first logic chip is connected to the output terminal of the first inverter, the B terminal of the second logic chip is connected to the output terminal of the second inverter, the input terminal of the first inverter and the input terminal of the second inverter are respectively connected to the third terminal of the second detection device and the third terminal of the third detection device, and the The Y end of the second logic chip is connected to the base of the fifth switch tube, the thirteenth end and the fifth end of the second analog switch, the Y end of the third logic chip is connected to the collector of the fifth switch tube, the sixth end and the twelfth end of the second analog switch, the first end and the third end of the second analog switch are respectively connected to the first end and the second end of the second inductor, the first end and the second end of the third analog switch are respectively connected to the first end and the second end of the third inductor, the second end and the ninth end of the second analog switch are both connected to the OUT2 end of the first analog switch and the second end of the sixth resistor, and the fourth end and the eleventh end of the second analog switch are both connected to the first end of the first optocoupler and the OUT1 end of the first analog switch.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: the abnormal detection protection circuit of the multi-graphics card terminal of the present invention performs multi-channel high-frequency voltage regulation processing on the connected electric energy by the power regulation module in cooperation with the signal fed back by the electric energy feedback module, controls the electric energy feedback module through the sampling switching module to detect the electric change of the electric energy output by the first output control module, and then adjusts the output feedback signal, performs electric energy processing through the first output control module, the second output control module and the third output control module and supplies power to the connected multiple graphics card terminals, when the abnormal detection module detects that the first output control module, the second output control module or the third output control module has an electric energy abnormality, the output control module with the electric energy abnormality will be disconnected, if the first output control module has an electric energy abnormality, the sampling switching module will be controlled to switch the sampling object, and the power supply of the power control module will continue to be maintained, so as to avoid the graphics card failure caused by the electric energy abnormality and improve the working efficiency of multiple graphics cards. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0028] Figure 1 A schematic block diagram of a multi-graphics card terminal abnormality detection protection circuit provided by an embodiment of the present invention.

[0029] Figure 2 A circuit diagram of an abnormality detection protection circuit for a multi-graphics card terminal provided by an embodiment of the present invention.

[0030] Figure 3 A circuit diagram of an abnormality detection module provided in an embodiment of the present invention.

[0031] Figure 4 A circuit diagram of a sampling switching module provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In one embodiment, see Figure 1 , a multi-graphics card terminal abnormality detection protection circuit, comprising: a power regulation module 1, a first output control module 2, a second output control module 3, a third output control module 4, an electric energy feedback module 5, an abnormality detection module 6 and a sampling switching module 7;

[0034] Specifically, the power supply regulating module 1 is connected to the power feedback module 5, and is used to access the DC power, and when receiving the feedback signal output by the power feedback module 5, performs multi-channel high-frequency voltage transformation and regulation processing on the DC power and outputs the first power;

[0035] A first output control module 2, connected to the power regulation module 1 and the abnormality detection module 6, is used to rectify the first electric energy and transmit the rectified electric energy, filter the transmitted electric energy and provide the second electric energy for the connected first graphics card, and stop the electric energy transmission when receiving the first abnormality signal output by the abnormality detection module 6;

[0036] The second output control module 3 is connected to the power regulation module 1 and the abnormality detection module 6, and is used to rectify the first electric energy and transmit the rectified electric energy, filter the transmitted electric energy and provide the third electric energy for the connected second graphics card, and stop the electric energy transmission when receiving the second abnormality signal output by the abnormality detection module 6;

[0037] a third output control module 4, connected to the power regulation module 1 and the abnormality detection module 6, for rectifying the first electric energy and transmitting the rectified electric energy, filtering the transmitted electric energy and providing the fourth electric energy for the connected third graphics card, and stopping the electric energy transmission when receiving the third abnormality signal output by the abnormality detection module 6;

[0038] A sampling switching module 7 is connected to the first output control module 2, the second output control module 3, the third output control module 4, the abnormality detection module 6 and the power feedback module 5, and is used to transmit the second electric energy to the power feedback module 5, and when receiving the first abnormal signal output by the abnormality detection module 6, transmit the third electric energy to the power feedback module 5, and when receiving the first abnormal signal and the second abnormal signal output by the abnormality detection module 6, transmit the fourth electric energy to the power feedback module 5;

[0039] The electric energy feedback module 5 is used to set a voltage threshold, isolate and divide the received second electric energy, third electric energy or fourth electric energy and compare it with the voltage threshold, and output a feedback signal when the voltage of the second electric energy, third electric energy or fourth electric energy changes;

[0040] The abnormality detection module 6 is used to set the overvoltage threshold and self-lock to output the first abnormal signal when the second electrical energy is greater than the overvoltage threshold, self-lock to output the second abnormal signal when the third electrical energy is greater than the overvoltage threshold, and self-lock to output the third abnormal signal when the fourth electrical energy is greater than the overvoltage threshold.

[0041] In a specific embodiment, the power regulation module 1 may adopt a power regulation circuit composed of a power interface, a capacitor, a diode, a transformer, etc., and may perform high-frequency isolation and voltage regulation processing on the connected DC power according to the feedback signal output by the power feedback module 5, and perform multi-channel voltage stabilization power supply; the first output control module 2 may adopt a first output control circuit composed of a diode, a capacitor, a field effect transistor, an inductor, etc., and may rectify, control power transmission and filter the power output by the power regulation module 1, and supply power to the connected graphics card terminal; the second output control module 3 may adopt a second output control circuit composed of a diode, a capacitor, a field effect transistor, an inductor, etc., and may rectify, control power transmission and filter the power output by the power regulation module 1, and supply power to the connected graphics card terminal; the third output control module 4 may adopt a third output control circuit composed of a diode, a capacitor, a field effect transistor, an inductor, etc., and may rectify, control power transmission and filter the power output by the power regulation module 1, and supply power to the connected graphics card terminal. The above-mentioned power feedback module 5 can adopt a power feedback circuit composed of a photoelectric coupler, a resistor, an adjustable voltage regulator, etc., can set a voltage threshold, and sample the power transmitted by the sampling switching module 7 and compare the sampling signal with the voltage threshold, and then judge the voltage change state and output a feedback signal; the above-mentioned abnormality detection module 6 can adopt an abnormality detection circuit composed of a resistor, a diode, a logic chip, etc., can perform overvoltage detection on the first output control module 2, the second output control module 3 and the third output control module 4, and perform high-level self-locking when overvoltage occurs; the above-mentioned sampling switching module 7 can adopt a sampling switching circuit composed of an analog switch, a transistor, an inverter, a logic chip, etc., can transmit the power output by the first output control module 2 to the power feedback module 5, and switch the connection state with the second output control module 3 and the third output control module 4 according to the detection device of the abnormality detection module 6.

[0042] In another embodiment, see Figure 1 , Figure 2 , Figure 3 and Figure 4 , the power regulation module 1 includes a power interface, a first capacitor C1, a second capacitor C2, a first resistor R1, a first regulator IC1, a first diode D1, a second diode D2 and a first transformer B1;

[0043] Specifically, the first end of the power interface is connected to one end of the first capacitor C1, the anode of the first diode D1 and the first end of the primary side of the first transformer B1, the cathode of the first diode D1 is connected to the cathode of the second diode D2, the anode of the second diode D2 is connected to the second end of the primary side of the first transformer B1 and the D end of the first regulator IC1, the S end of the first regulator IC1 is connected to the other end of the first capacitor C1 and the second end of the power interface and is connected to the C end of the first regulator IC1 and the power feedback module 5 through the second capacitor C2 and the first resistor R1 in sequence, and the first secondary side, the second secondary side, the third secondary side and the fourth secondary side of the first transformer B1 are respectively connected to the first output control module 2, the second output control module 3, the third output control module 4 and the power feedback module 5.

[0044] In a specific embodiment, the first regulator IC1 may be TOP223Y; the first transformer B1 may be a high-frequency transformer.

[0045] Further, the first output control module 2 includes a sixth diode D6, a seventh capacitor C7, a fourth resistor R4, a third power tube Q3, a third switch tube V3, a first inductor L1, an eighth capacitor C8 and a first interface;

[0046] Specifically, the anode of the sixth diode D6 is connected to the first end of the first secondary side of the first transformer B1, the cathode of the sixth diode D6 is connected to the drain of the third power tube Q3 and one end of the seventh capacitor C7 and is connected to the gate of the third power tube Q3 and the collector of the third switch tube V3 through the fourth resistor R4, the source of the third power tube Q3 is connected to the first end of the first inductor L1, the second end of the first inductor L1 is connected to the first end of the first interface and one end of the eighth capacitor C8, the emitter of the third switch tube V3 is connected to the other end of the seventh capacitor C7, the second end of the first interface, the other end of the eighth capacitor C8 and the second end of the first secondary side of the first transformer B1, and the base of the third switch tube V3 is connected to the abnormality detection module 6.

[0047] In a specific embodiment, the third power tube Q3 can be an N-channel field effect tube; the sixth diode D6, the seventh capacitor C7, the first inductor L1 and the eighth capacitor C8 perform rectification and filtering processing; the first interface is used to connect the power supply of the graphics card terminal; the third switch tube V3 can be an NPN transistor.

[0048] Further, the abnormality detection module 6 includes a ninth resistor R9, an eighth diode D8, a tenth resistor R10, a ninth diode D9, a tenth diode D10, a first logic chip J1 and a first power supply VCC1;

[0049] Specifically, the cathode of the eighth diode D8 is connected to the first end of the first interface through the ninth resistor R9, the anode of the eighth diode D8 is connected to the anode of the ninth diode D9 and is connected to the second end of the first interface through the tenth resistor R10, the cathode of the ninth diode D9 is connected to the cathode of the tenth diode D10 and the A end of the first logic chip J1, the B end of the first logic chip J1 is connected to the first power supply VCC1, and the Y end of the first logic chip J1 is connected to the anode of the tenth diode D10, the base of the third switch tube V3 and the sampling switching module 7.

[0050] In a specific embodiment, the ninth resistor R9, the eighth diode D8 and the tenth resistor R10 set the overvoltage threshold; the first logic chip J1 can be an AND gate chip, which can self-lock the high level in conjunction with the ninth diode D9, the tenth diode D10 and the first power supply VCC1.

[0051] Further, the second output control module 3 includes a fifth diode D5, a fifth capacitor C5, a third resistor R3, a second power tube Q2, a second switch tube V2, a second inductor L2, a sixth capacitor C6 and a second interface; the abnormality detection module 6 includes a second detection device;

[0052] Specifically, the anode of the fifth diode D5 is connected to the first end of the second secondary side of the first transformer B1, the cathode of the fifth diode D5 is connected to the drain of the second power tube Q2 and one end of the fifth capacitor C5 and is connected to the gate of the second power tube Q2 and the collector of the second switch tube V2 through the third resistor R3, the source of the second power tube Q2 is connected to the first end of the second inductor L2, the second end of the second inductor L2 is connected to one end of the sixth capacitor C6, the first end of the second detection device and the first end of the second interface, the other end of the fifth capacitor C5 is connected to the emitter of the second switch tube V2, the other end of the sixth capacitor C6, the second end of the second interface, the second end of the second detection device and the second end of the second secondary side of the first transformer B1, and the third end of the second detection device is connected to the sampling switching module 7.

[0053] In a specific embodiment, the second power tube Q2 can be an N-channel field effect tube; the fifth diode D5, the fifth capacitor C5, the second inductor L2 and the sixth capacitor C6 perform rectification and filtering processing; the second switch tube V2 can be an NPN transistor; the second interface is used to connect to the power supply end of the graphics card terminal; the circuit composition structure of the second detection device is the same as the circuit composition structure of the ninth resistor R9, the eighth diode D8, the tenth resistor R10, the ninth diode D9, the tenth diode D10, the first logic chip J1 and the first power supply VCC1.

[0054] Further, the third output control module 4 includes a third diode D3, a third capacitor C3, a second resistor R2, a first switch tube V1, a first power tube Q1, a third inductor L3, a fourth capacitor C4 and a third interface; the abnormality detection module 6 includes a third detection device;

[0055] Specifically, the anode of the third diode D3 is connected to the first end of the third secondary side of the first transformer B1, the cathode of the third diode D3 is connected to the drain of the first power tube Q1 and one end of the third capacitor C3 and is connected to the gate of the first power tube Q1 and the collector of the first switch tube V1 through the second resistor R2, the source of the first power tube Q1 is connected to the first end of the third inductor L3, the second end of the third inductor L3 is connected to one end of the fourth capacitor C4, the first end of the third interface and the first end of the third detection device, the other end of the third capacitor C3 is connected to the emitter of the first switch tube V1, the other end of the fourth capacitor C4, the second end of the third interface, the second end of the third detection device and the second end of the third secondary side of the first transformer B1, and the third end of the third detection device is connected to the sampling switching module 7.

[0056] In a specific embodiment, the first power tube Q1 can be an N-channel field effect tube; the third diode D3, the third capacitor C3, the third inductor L3 and the fourth capacitor C4 perform rectification and filtering processing; the first switch tube V1 can be an NPN transistor; the circuit composition structure of the third detection device is the same as the circuit composition structure of the ninth resistor R9, the eighth diode D8, the tenth resistor R10, the ninth diode D9, the tenth diode D10, the first logic chip J1 and the first power supply VCC1.

[0057] Further, the electric energy feedback module 5 includes a seventh diode D7, a ninth capacitor C9, a first optical coupler IC2, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first controllable voltage regulator IC3, a tenth capacitor C10 and an eleventh capacitor C11;

[0058] Specifically, the anode of the seventh diode D7 is connected to the first end of the fourth secondary side of the first transformer B1, the cathode of the seventh diode D7 is connected to one end of the ninth capacitor C9 and the third end of the first optocoupler IC2, the fourth end of the first optocoupler IC2 is connected to the C end of the first regulator IC1, the first end of the first optocoupler IC2 is connected to the sampling switching module 7, the second end of the first optocoupler IC2 is connected to the cathode of the first controllable voltage-stabilizing source IC3, one end of the eleventh capacitor C11 and the first end of the sixth resistor R6 through the fifth resistor R5, the second end of the sixth resistor R6 is connected to the other end of the eleventh capacitor C11, the control end of the first controllable voltage-stabilizing source IC3 and one end of the eighth resistor R8 through the seventh resistor R7, the other end of the eighth resistor R8 is connected to the anode of the first controllable voltage-stabilizing source IC3, the second end of the third interface, the second end of the second interface and the second end of the first interface, and is connected to the other end of the ninth capacitor C9, the second end of the fourth secondary side of the first transformer B1 and the second end of the power supply interface through the tenth capacitor C10.

[0059] In a specific embodiment, the first optical coupler IC2 may be a PC817 optical coupler; the first controllable voltage regulator IC3 may be a TL413.

[0060] Further, the sampling switching module 7 includes a first analog switch IC4, a second analog switch IC5, a second power supply VCC2, an eleventh resistor R11, a fourth switch tube V4, a second logic chip J2, a third logic chip J3, a first inverter J4, a second inverter J5 and a fifth switch tube V5;

[0061] Specifically, the IN1 terminal and the IN2 terminal of the first analog switch IC4 are connected to the first end and the second end of the first inductor L1 respectively, the CTRL1 terminal and the CTRL2 terminal of the first analog switch IC4 are connected to the collector of the fourth switch tube V4 and connected to the second power supply VCC2 through the eleventh resistor R11, the base of the fourth switch tube V4 is connected to the Y terminal of the first logic chip J1, the A terminal of the second logic chip J2 and the A terminal of the third logic chip J3, the B terminal of the first logic chip J1 is connected to the output terminal of the first inverter J4, the B terminal of the second logic chip J2 is connected to the output terminal of the second inverter J5, the input terminal of the first inverter J4 and the input terminal of the second inverter J5 are connected to the third terminal of the second detection device and the third terminal of the third detection device respectively, and the second The Y end of the logic chip J2 is connected to the base of the fifth switch tube V5, the thirteenth end and the fifth end of the second analog switch IC5, the Y end of the third logic chip J3 is connected to the collector of the fifth switch tube V5, the sixth end and the twelfth end of the second analog switch IC5, the first end and the third end of the second analog switch IC5 are respectively connected to the first end and the second end of the second inductor L2, the first end and the second end of the third analog switch are respectively connected to the first end and the second end of the third inductor L3, the second end and the ninth end of the second analog switch IC5 are both connected to the OUT2 end of the first analog switch IC4 and the second end of the sixth resistor R6, and the fourth end and the eleventh end of the second analog switch IC5 are both connected to the first end of the first optocoupler IC2 and the OUT1 end of the first analog switch IC4.

[0062] In a specific embodiment, the first analog switch IC4 and the second analog switch IC5 can both use CD4066 chips; the fourth switch tube V4 and the fifth switch tube V5 can both use NPN transistors; the first inverter J4 and the second inverter J5 can both use NOT gate chips; the second logic chip J2 and the third logic chip J3 can both use AND gate chips.

[0063] In a multi-graphics card terminal abnormality detection protection circuit of the present embodiment, direct current power is connected by a power interface, the C end of the first regulator IC1 receives the power transmitted by the fourth end of the first optocoupler IC2, and adjusts the transformation value of the first transformer B1 according to the power voltage transmitted by the fourth end of the first optocoupler IC2, and then isolates and outputs through the first secondary side, the second secondary side, the third secondary side and the fourth secondary side of the first transformer B1, and the first power tube Q1, the second power tube Q2 and the third power tube Q3 are all turned on, the sixth diode D6 cooperates with the seventh capacitor C7, the first inductor L1 and the eighth capacitor C8 to perform rectification and filtering, output the second power and transmit it to the graphics card terminal connected to the first interface, and the fifth diode D5 cooperates with the fifth capacitor C5, the second inductor L2 The third diode D3 cooperates with the third capacitor C3, the third inductor L3 and the fourth capacitor C4 to perform rectification and filtering, output the fourth electric energy and transmit it to the graphics card terminal connected to the third interface. Since the second power supply VCC2 and the eleventh resistor R11 control the CTRL1 and CTRL2 terminals of the first analog switch IC4 to become high level, the IN1 terminal and OUT1 terminal of the first analog switch IC4 are turned on, and the IN2 terminal and OUT2 terminal of the first analog switch IC4 are turned on, and the second electric energy is transmitted to the second optocoupler and the sixth resistor R6. Since the sixth resistor R6 cooperates with the seventh resistor R7, the eighth resistor R8, the eleventh capacitor C11, and the tenth resistor R9, the second electric energy is transmitted to the second optocoupler and the sixth resistor R6. The capacitor C10, the first thyristor voltage regulator, the fifth resistor R5 and the first optical coupler IC2 compare the second electric energy with the set voltage threshold, and then provide a feedback signal to the C terminal of the first regulator IC1. The ninth resistor R9, the eighth diode D8 and the tenth resistor R10 perform overvoltage detection on the electric energy input to the first interface. When overvoltage occurs, the first logic chip J1 controls the third switch tube V3 to turn on, controls the third power tube Q3 to turn off, and controls the fourth switch tube V4 to turn on. At this time, if the second detection device does not detect that the second interface has abnormal electric energy, the Y terminal of the second logic chip J2 will output a high level, control the fifth switch tube V5 to turn on, control the first terminal and the second terminal of the second analog switch IC5 to turn on, and the third terminal of the second analog switch IC5 is turned on. The fourth end is turned on, so that the sixth resistor R6 and the second optical coupler detect the electric energy of the second interface. If the second detection device detects that the second interface has an electric energy abnormality and the third detection device does not detect that the third interface has an electric energy abnormality, the second detection device triggers the second switch tube V2 to turn on, and the second power tube Q2 is turned off. The third logic chip J3 will control the eighth and ninth ends, the tenth and eleventh ends of the second analog switch IC5 to turn on, so that the sixth resistor R6 and the second optical coupler detect the electric energy of the third interface, so that the power supply regulation module 1 can normally perform voltage stabilization and power supply. When the third detection device detects that the third interface has an electric energy abnormality, it will control the first switch tube V1 and the first power tube Q1 to turn on, and stop supplying power to the third interface.

[0064] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0065] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A multi-graphics card terminal abnormality detection protection circuit, characterized in that: The multi-graphics card terminal abnormality detection protection circuit comprises: a power supply adjustment module, a first output control module, a second output control module, a third output control module, an electric energy feedback module, an abnormality detection module and a sampling switching module; The power supply regulating module is connected to the power feedback module, and is used to receive the DC power, and when receiving the feedback signal output by the power feedback module, performs multi-channel high-frequency voltage transformation and regulation processing on the DC power and outputs the first power; The first output control module is connected to the power regulation module and the abnormality detection module, and is used to rectify the first electric energy and transmit the rectified electric energy, filter the transmitted electric energy and provide the second electric energy for the connected first graphics card, and stop the electric energy transmission when receiving the first abnormality signal output by the abnormality detection module; The second output control module is connected to the power regulation module and the abnormality detection module, and is used to rectify the first electric energy and transmit the rectified electric energy, filter the transmitted electric energy and provide the third electric energy for the connected second graphics card, and stop the electric energy transmission when receiving the second abnormality signal output by the abnormality detection module; The third output control module is connected to the power regulation module and the abnormality detection module, and is used to rectify the first electric energy and transmit the rectified electric energy, filter the transmitted electric energy and provide the fourth electric energy for the connected third graphics card, and stop the electric energy transmission when receiving the third abnormality signal output by the abnormality detection module; The sampling switching module is connected to the first output control module, the second output control module, the third output control module, the abnormality detection module and the power feedback module, and is used to transmit the second electric energy to the power feedback module, transmit the third electric energy to the power feedback module when receiving the first abnormality signal output by the abnormality detection module, and transmit the fourth electric energy to the power feedback module when receiving the first abnormality signal and the second abnormality signal output by the abnormality detection module; The electric energy feedback module is used to set a voltage threshold, isolate and divide the received second electric energy, third electric energy or fourth electric energy and compare it with the voltage threshold, and output a feedback signal when the voltage of the second electric energy, third electric energy or fourth electric energy changes; The abnormality detection module is used to set an overvoltage threshold and self-lock to output a first abnormal signal when the second electrical energy is greater than the overvoltage threshold, self-lock to output a second abnormal signal when the third electrical energy is greater than the overvoltage threshold, and self-lock to output a third abnormal signal when the fourth electrical energy is greater than the overvoltage threshold.

2. The multi-graphics card terminal abnormality detection protection circuit according to claim 1, characterized in that: The power regulation module includes a power interface, a first capacitor, a second capacitor, a first resistor, a first regulator, a first diode, a second diode and a first transformer; The first end of the power interface is connected to one end of the first capacitor, the anode of the first diode and the first end of the primary side of the first transformer, the cathode of the first diode is connected to the cathode of the second diode, the anode of the second diode is connected to the second end of the primary side of the first transformer and the D end of the first regulator, the S end of the first regulator is connected to the other end of the first capacitor and the second end of the power interface and is connected to the C end of the first regulator and the power feedback module through the second capacitor and the first resistor in sequence, and the first secondary side, the second secondary side, the third secondary side and the fourth secondary side of the first transformer are respectively connected to the first output control module, the second output control module, the third output control module and the power feedback module.

3. The multi-graphics card terminal abnormality detection protection circuit according to claim 2, characterized in that: The first output control module includes a sixth diode, a seventh capacitor, a fourth resistor, a third power tube, a third switch tube, a first inductor, an eighth capacitor and a first interface; The anode of the sixth diode is connected to the first end of the first secondary side of the first transformer, the cathode of the sixth diode is connected to the drain of the third power tube and one end of the seventh capacitor and is connected to the gate of the third power tube and the collector of the third switch tube through the fourth resistor, the source of the third power tube is connected to the first end of the first inductor, the second end of the first inductor is connected to the first end of the first interface and one end of the eighth capacitor, the emitter of the third switch tube is connected to the other end of the seventh capacitor, the second end of the first interface, the other end of the eighth capacitor and the second end of the first secondary side of the first transformer, and the base of the third switch tube is connected to the abnormality detection module.

4. The multi-graphics card terminal abnormality detection protection circuit according to claim 3, characterized in that: The abnormality detection module includes a ninth resistor, an eighth diode, a tenth resistor, a ninth diode, a tenth diode, a first logic chip and a first power supply; The cathode of the eighth diode is connected to the first end of the first interface through the ninth resistor, the anode of the eighth diode is connected to the anode of the ninth diode and connected to the second end of the first interface through the tenth resistor, the cathode of the ninth diode is connected to the cathode of the tenth diode and the A end of the first logic chip, the B end of the first logic chip is connected to the first power supply, and the Y end of the first logic chip is connected to the anode of the tenth diode, the base of the third switch tube and the sampling switching module.

5. The multi-graphics card terminal abnormality detection protection circuit according to claim 4, characterized in that: The second output control module includes a fifth diode, a fifth capacitor, a third resistor, a second power tube, a second switch tube, a second inductor, a sixth capacitor and a second interface; the abnormality detection module includes a second detection device; The anode of the fifth diode is connected to the first end of the second secondary side of the first transformer, the cathode of the fifth diode is connected to the drain of the second power tube and one end of the fifth capacitor and is connected to the gate of the second power tube and the collector of the second switch tube through the third resistor, the source of the second power tube is connected to the first end of the second inductor, the second end of the second inductor is connected to one end of the sixth capacitor, the first end of the second detection device and the first end of the second interface, the other end of the fifth capacitor is connected to the emitter of the second switch tube, the other end of the sixth capacitor, the second end of the second interface, the second end of the second detection device and the second end of the second secondary side of the first transformer, and the third end of the second detection device is connected to the sampling switching module.

6. The multi-graphics card terminal abnormality detection protection circuit according to claim 5, characterized in that: The third output control module includes a third diode, a third capacitor, a second resistor, a first switch tube, a first power tube, a third inductor, a fourth capacitor and a third interface; the abnormality detection module includes a third detection device; The anode of the third diode is connected to the first end of the third secondary side of the first transformer, the cathode of the third diode is connected to the drain of the first power tube and one end of the third capacitor and is connected to the gate of the first power tube and the collector of the first switch tube through the second resistor, the source of the first power tube is connected to the first end of the third inductor, the second end of the third inductor is connected to one end of the fourth capacitor, the first end of the third interface and the first end of the third detection device, the other end of the third capacitor is connected to the emitter of the first switch tube, the other end of the fourth capacitor, the second end of the third interface, the second end of the third detection device and the second end of the third secondary side of the first transformer, and the third end of the third detection device is connected to the sampling switching module.

7. The multi-graphics card terminal abnormality detection protection circuit according to claim 6, characterized in that: The electric energy feedback module includes a seventh diode, a ninth capacitor, a first optical coupler, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a first controllable voltage stabilizing source, a tenth capacitor and an eleventh capacitor; The anode of the seventh diode is connected to the first end of the fourth secondary side of the first transformer, the cathode of the seventh diode is connected to one end of the ninth capacitor and the third end of the first optocoupler, the fourth end of the first optocoupler is connected to the C end of the first regulator, the first end of the first optocoupler is connected to the sampling switching module, the second end of the first optocoupler is connected to the cathode of the first controllable voltage-stabilizing source, one end of the eleventh capacitor and the first end of the sixth resistor through the fifth resistor, the second end of the sixth resistor is connected to the other end of the eleventh capacitor, the control end of the first controllable voltage-stabilizing source and one end of the eighth resistor through the seventh resistor, the other end of the eighth resistor is connected to the anode of the first controllable voltage-stabilizing source, the second end of the third interface, the second end of the second interface and the second end of the first interface, and is connected to the other end of the ninth capacitor, the second end of the fourth secondary side of the first transformer and the second end of the power supply interface through the tenth capacitor.

8. The multi-graphics card terminal abnormality detection protection circuit according to claim 7, characterized in that: The sampling switching module includes a first analog switch, a second analog switch, a second power supply, an eleventh resistor, a fourth switch tube, a second logic chip, a third logic chip, a first inverter, a second inverter and a fifth switch tube; The IN1 terminal and the IN2 terminal of the first analog switch are connected to the first terminal and the second terminal of the first inductor respectively, the CTRL1 terminal and the CTRL2 terminal of the first analog switch are connected to the collector of the fourth switch tube and connected to the second power supply through the eleventh resistor, the base of the fourth switch tube is connected to the Y terminal of the first logic chip, the A terminal of the second logic chip and the A terminal of the third logic chip, the B terminal of the first logic chip is connected to the output terminal of the first inverter, the B terminal of the second logic chip is connected to the output terminal of the second inverter, the input terminal of the first inverter and the input terminal of the second inverter are connected to the third terminal of the second detection device and the third terminal of the third detection device respectively, and the second The Y end of the logic chip is connected to the base of the fifth switch tube, the thirteenth end and the fifth end of the second analog switch, the Y end of the third logic chip is connected to the collector of the fifth switch tube, the sixth end and the twelfth end of the second analog switch, the first end and the third end of the second analog switch are respectively connected to the first end and the second end of the second inductor, the first end and the second end of the third analog switch are respectively connected to the first end and the second end of the third inductor, the second end and the ninth end of the second analog switch are both connected to the OUT2 end of the first analog switch and the second end of the sixth resistor, and the fourth end and the eleventh end of the second analog switch are both connected to the first end of the first optocoupler and the OUT1 end of the first analog switch.

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