Short circuit protection system of chip reliability monitoring and early warning board card

Abstract

The invention discloses a short-circuit protection system of a chip reliability monitoring and early warning board card, and relates to the technical field of short-circuit protection. The first transmission module is used for providing electric energy for the chip module to be tested; the second transmission module provides electric energy for the monitoring and early warning board card module; the short circuit detection module is used for carrying out current detection, signal conversion and amplification and short circuit comparison on the chip module to be detected; the monitoring and early warning board card module is used for signal receiving and module control; and the short circuit self-locking control module is used for carrying out short circuit judgment on the monitoring and early warning board card module and controlling the second transmission module to be powered off, controlling the auxiliary protection module to carry out periodic and timed short circuit protection, controlling the alarm module to carry out fault alarm and controlling the false trigger protection module to carry out false trigger protection when the monitoring and early warning board card module is short-circuited. According to the short-circuit protection system of the chip reliability monitoring and early warning board card, the short-circuit protection reliability of the monitoring and early warning board card can be improved, and the safety of the system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of short circuit protection, and in particular to a short circuit protection system of a chip reliability monitoring and early warning board. Background Art

[0002] A short circuit is when a circuit or part of a circuit is short-circuited. For example, when the load and the power supply are connected together by a wire, it is called a short circuit.

[0003] When a short circuit occurs, the current provided by the power supply will be much larger than the current provided when the circuit is open. Under normal circumstances, short circuit is not allowed. If a short circuit occurs, the chip will be burned out in serious cases. To ensure the safety of the chip, most of the existing chips are equipped with a monitoring and early warning board. The monitoring and early warning board adopts an MCU chip, which cooperates with the set software system and the detected chip current change rate to determine whether the chip has a short circuit and perform power-off protection when a short circuit occurs. However, since it is impossible to ensure that the monitoring and early warning board is working normally, when the monitoring and early warning board fails, the chip cannot be protected and controlled normally. In addition, a failure of the monitoring and early warning board may also cause confusion in the internal software of the monitoring and early warning board, resulting in false triggering, reducing the protection of the chip and reducing the reliability of the monitoring and early warning board. Therefore, there is room for improvement. Summary of the invention

[0004] According to the technical problems mentioned in the above background technology, a short circuit protection system for a chip reliability monitoring and early warning board is provided. To achieve the above purpose, the present invention provides the following technical solutions: A short circuit protection system for a chip reliability monitoring and early warning board, comprising: A power supply module, a first transmission module, a chip module to be tested, a short circuit detection module, a second transmission module, a monitoring and early warning board module, a short circuit self-locking control module, an auxiliary protection module, an alarm module and a false trigger protection module; The power module is used to receive electric energy, regulate the received electric energy and realize multi-channel output; The first transmission module is connected to the power module, the chip module to be tested, the false trigger protection module and the auxiliary protection module; the first transmission module transmits the electric energy output by the power module to the chip module to be tested; the first transmission module receives the first protection signal output by the false trigger protection module and the second protection signal output by the auxiliary protection module and stops the transmission of electric energy; The chip module to be tested is used to receive the electric energy output by the first transmission module; The short circuit detection module is connected to the chip module to be tested; the short circuit detection module performs current detection on the chip module to be tested and converts and amplifies the detected signal; and a first short circuit threshold is set by the short circuit detection module; The second transmission module is connected to the power module, the monitoring and early warning card module and the short-circuit self-locking control module; the second transmission module transmits the electric energy output by the power module to the monitoring and early warning card module; at the same time, the second transmission module receives the third protection signal output by the short-circuit self-locking control module; The monitoring and early warning card module is connected to the short-circuit detection module; the monitoring and early warning card module receives the electric energy output by the second transmission module; at the same time, the monitoring and early warning card module receives the first short-circuit signal and outputs a fourth protection signal; the monitoring and early warning card module transmits the fourth protection signal to the false trigger protection module; The short-circuit self-locking control module is connected to the monitoring and early warning board module; when the chip module to be tested is short-circuited, the short-circuit self-locking control module self-locks and outputs a second short-circuit signal to the auxiliary protection module; The auxiliary protection module is connected to the short-circuit self-locking control module; the auxiliary protection module receives the second short-circuit signal; the auxiliary protection module periodically outputs the second protection signal to the first transmission module; The alarm module is connected to the short-circuit self-locking control module and receives a second short-circuit signal; The false trigger protection module is connected to the monitoring and early warning board module and the short-circuit self-locking control module; the false trigger protection module receives the fourth protection signal and isolates and outputs the first protection signal; the false trigger protection module receives the second short-circuit signal and stops receiving the fourth protection signal. Further, the power supply module includes: a power supply interface and a power supply regulating device; the first transmission module includes: a first power tube, a seventh resistor and a first switch tube; the chip under test module includes: a chip under test interface; The power interface is connected to the input end of the power regulation device; the first output end of the power regulation device is connected to the drain of the first power tube and is connected to the gate of the first power tube and the collector of the first switch tube through the seventh resistor; the emitter of the first switch tube is grounded; the base of the first switch tube is connected to the false trigger protection module and the auxiliary protection module; the source of the first power tube is connected to the first end of the chip interface to be tested, and the second end of the chip interface to be tested is connected to the short circuit detection module.

[0005] Further, the short circuit detection module includes: a first resistor, a second resistor, a first operational amplifier, a third resistor, a fourth resistor, a second operational amplifier, a third operational amplifier, a first capacitor, a fifth resistor, a first comparator and a first threshold device; The in-phase end of the first operational amplifier is connected to the second end of the interface of the chip to be tested and is connected to the inverting end of the first operational amplifier, one end of the second resistor and the ground through the first resistor; the other end of the second resistor is connected to the output end of the first operational amplifier and is connected to the in-phase end of the second operational amplifier and one end of the fourth resistor through the third resistor; the other end of the fourth resistor is connected to the output end of the third operational amplifier and is connected to the inverting end of the third operational amplifier and one end of the fifth resistor through the first capacitor; the in-phase end of the third operational amplifier is grounded; the other end of the fifth resistor is connected to the output end of the second operational amplifier and the inverting end of the first comparator, the in-phase end of the first comparator is connected to the first threshold device, and the output end of the first comparator is connected to the auxiliary protection module and the monitoring and early warning board module.

[0006] Further, the second transmission module includes: an eighth resistor, a second power tube and a sixth switch tube; the monitoring and early warning card module includes: a monitoring and early warning card; The drain of the second power tube is connected to the second end of the power supply regulating device and is connected to the gate of the second power tube and the collector of the sixth switch tube through the eighth resistor. The emitter of the sixth switch tube is grounded. The source of the second power tube is connected to the first end of the monitoring and early warning board; the second end of the monitoring and early warning board is connected to the short-circuit self-locking control module; the third end of the monitoring and early warning board is connected to the false trigger protection module; the fourth end of the monitoring and early warning board is connected to the output end of the first comparator.

[0007] Furthermore, the short-circuit self-locking control module includes: a short-circuit detection device, a first inverter and a third switch tube; The first end of the short-circuit detection device is connected to the second end of the monitoring and early warning board; the second end of the short-circuit detection device and the emitter of the third switch tube are both grounded; the third end of the short-circuit detection device is connected to the collector of the third switch tube and the input end of the first inverter; the output end of the first inverter is connected to the base of the third switch tube, the base of the sixth switch tube, the alarm module and the auxiliary protection module.

[0008] Furthermore, the alarm module comprises: a ninth resistor, a fourth switch tube and an alarm device; The base of the fourth switch tube is connected to the output end of the first inverter through a ninth resistor, the emitter of the fourth switch tube is grounded, the collector of the fourth switch tube is connected to one end of the alarm device, and the other end of the alarm device is connected to the third end of the power supply regulating device.

[0009] Furthermore, the false trigger protection module includes a tenth resistor, a fifth switch tube and a second diode; The base of the fifth switch tube is connected to the output end of the first inverter through the tenth resistor, the emitter of the fifth switch tube is grounded, the collector of the fifth switch tube is connected to the anode of the second diode and the third end of the monitoring and early warning board, and the cathode of the second diode is connected to the base of the first switch tube.

[0010] Furthermore, the auxiliary protection module includes: a first controller, a second capacitor, a third capacitor, a second switch tube, a sixth resistor and a first diode; The eighth end of the first controller, the collector of the second switch tube and one end of the sixth resistor are all connected to the fourth end of the power supply regulating device, the other end of the sixth resistor is connected to the seventh end and the sixth end of the first controller and is grounded through the second capacitor, the first end of the first controller is grounded, the fifth end of the first controller is grounded through the third capacitor, the second end of the first controller is connected to the output end of the first comparator, the emitter of the second switch tube is connected to the fourth end of the first controller, the third end of the first controller is connected to the anode of the first diode, and the cathode of the first diode is connected to the base of the first switch tube.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The short-circuit protection system of the chip reliability monitoring and early warning board of the present invention can perform short-circuit detection on the chip module to be tested by cooperating with the short-circuit detection module. When a short circuit occurs, the first transmission module is directly controlled to perform power-off protection, thereby realizing short-circuit protection for the chip to be tested.

[0012] At the same time, the short-circuit self-locking control module can be used to detect working short circuits on the monitoring and early warning board module. In the event of a short circuit, the false trigger protection module is controlled to perform false trigger protection processing, and the auxiliary protection module is controlled to perform periodic timed self-recovery power-off protection. The alarm module performs a fault alarm, thereby improving the short-circuit protection reliability of the monitoring and early warning board and improving the safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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.

[0014] Figure 1 A schematic block diagram of a short-circuit protection system for a chip reliability monitoring and early warning board provided by an example of the present invention.

[0015] Figure 2 A circuit diagram of a short-circuit protection system for a chip reliability monitoring and early warning board provided by an example of the present invention.

[0016] Figure 3 A connection circuit diagram of an alarm module provided for an example of the present invention.

[0017] Figure 4 A connection circuit diagram of a false trigger protection module provided by an example of the present invention.

[0018] Among them; 1. power supply module; 2. first transmission module; 3. chip module to be tested; 4. short circuit detection module; 5. second transmission module; 6. monitoring and early warning board module; 7. short circuit self-locking control module; 8. auxiliary protection module; 9. alarm module; 10. false trigger protection module. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0020] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0021] As a preferred embodiment, Figure 1 As shown, a short circuit protection system of a chip reliability monitoring and early warning board includes: a power supply module 1, a first transmission module 2, a chip module to be tested 3, a short circuit detection module 4, a second transmission module 5, a monitoring and early warning board module 6, a short circuit self-locking control module 7, an auxiliary protection module 8, an alarm module 9 and a false trigger protection module 10; The power module 1 is used to receive electric energy, regulate the received electric energy and realize multi-channel output; The first transmission module 2 is connected to the power module 1, the chip module to be tested 3, the false trigger protection module 10 and the auxiliary protection module 8, and is used to transmit the electric energy output by the power module 1 to the chip module to be tested 3, and is used to receive the first protection signal output by the false trigger protection module 10 and the second protection signal output by the auxiliary protection module 8 and stop the transmission of electric energy; The chip module 3 to be tested is used to receive the electric energy output by the first transmission module 2; The short circuit detection module 4 is connected to the chip module 3 to be tested, and is used to detect the current of the chip module 3 to be tested and convert and amplify the detected signal, and is used to set a first short circuit threshold and perform short circuit comparison processing (the specific comparison method is a commonly used method in the art, so it is not repeated here, that is, when the resistance value is less than a certain threshold value, it can be considered as a short circuit), and is used to output a first short circuit signal when a short circuit occurs; The second transmission module 5 is connected to the power module 1, the monitoring and early warning card module 6 and the short-circuit self-locking control module 7, and is used to transmit the electric energy output by the power module 1 to the monitoring and early warning card module 6, and is used to receive the third protection signal output by the short-circuit self-locking control module 7; A monitoring and early warning card module 6 is connected to the short-circuit detection module 4, and is used to receive the electric energy output by the second transmission module 5, to receive the first short-circuit signal and output a fourth protection signal, and to transmit the fourth protection signal to the false trigger protection module 10; The short-circuit self-locking control module 7 is connected to the monitoring and early warning card module 6, and is used to perform short-circuit detection, signal processing and short-circuit comparison processing on the monitoring and early warning card module 6 (the specific comparison method is a commonly used method in this field, so it is not repeated here), and is used to self-lock and output a second short-circuit signal when a short circuit occurs; The auxiliary protection module 8 is connected to the short-circuit self-locking control module 7 and is used to receive the second short-circuit signal; the auxiliary protection module starts to periodically output the second protection signal to the first transmission module; An alarm module 9, connected to the short-circuit self-locking control module 7, is used to receive the second short-circuit signal and monitor and warn the board fault display; The false trigger protection module 10 is connected to the monitoring and early warning board module 6 and the short-circuit self-locking control module 7, and is used to receive the fourth protection signal and isolate and output the first protection signal, and is used to receive the second short-circuit signal and stop receiving the fourth protection signal.

[0022] As a preferred embodiment, the power supply module 1 can adopt a power supply circuit, which can be connected to DC power and perform voltage regulation and multi-channel output processing on the connected power; the first transmission module 2 can adopt a first transmission circuit composed of power tubes to control the transmission state of power; the chip module 3 to be tested can adopt a chip interface to be connected to the chip to be tested; the short-circuit detection module 4 can adopt a short-circuit detection circuit composed of a current detection circuit, a signal processing circuit and a short-circuit comparison circuit, the current detection circuit detects the current output by the chip module 3 to be tested, the signal processing circuit performs signal conversion and amplification processing on the detected signal, and the short-circuit comparison circuit sets the short-circuit threshold to perform short-circuit comparison on the processed signal to determine whether a short circuit occurs; the second transmission module 5 can adopt a second transmission circuit composed of power tubes to control the transmission state of power; monitoring and early warning board Module 6 can adopt a monitoring and early warning board card, which integrates many components such as an operator, a controller, a memory, and an input and output device to realize functions such as signal processing, data storage, module control, and timing control, and realize monitoring control, early warning, and protection control of the chip module 3 to be tested; the short-circuit self-locking control module 7 can adopt a short-circuit self-locking control circuit to perform current detection, signal processing, and short-circuit comparison on the monitoring and early warning board card module 6, and perform signal self-locking when a short circuit occurs; the auxiliary protection module 8 can adopt an auxiliary protection circuit composed of NE555 integrated circuits to perform power-off control on the first transmission module 2; the alarm module 9 can adopt an alarm circuit to realize fault alarm; the false trigger protection module 10 can adopt a false trigger protection circuit composed of transistors, diodes, etc., to lower the signal potential output by the monitoring and early warning board card module 6 to perform false trigger protection control.

[0023] In another embodiment, Figure 1 , Figure 2 , Figure 3 and Figure 4 , the power supply module 1 includes a power supply interface and a power supply regulating device; the first transmission module 2 includes a first power tube Q1, a seventh resistor R7 and a first switch tube VT1; the chip module 3 to be tested includes a chip interface to be tested; Specifically, the power interface is connected to the input end of the power regulation device, the first output end of the power regulation device is connected to the drain of the first power tube Q1 and the gate of the first power tube Q1 and the collector of the first switch tube VT1 through the seventh resistor R7, the emitter of the first switch tube VT1 is grounded, the base of the first switch tube VT1 is connected to the false trigger protection module 10 and the auxiliary protection module 8, the source of the first power tube Q1 is connected to the first end of the chip interface to be tested, and the second end of the chip interface to be tested is connected to the short circuit detection module 4.

[0024] In a specific embodiment, the power supply regulating device may adopt a flyback multi-output switching power supply to provide voltages of different potentials, which will not be elaborated here; the first power tube Q1 may select an N-channel enhancement type MOS tube to control the transmission of electric energy, and cooperate with the first switch tube VT1 and the seventh resistor R7 to form a first transmission circuit, wherein the first switch tube VT1 may select an NPN type transistor.

[0025] Further, the short circuit detection module 4 includes a first resistor R1, a second resistor R2, a first operational amplifier OP1, a third resistor R3, a fourth resistor R4, a second operational amplifier OP2, a third operational amplifier OP3, a first capacitor C1, a fifth resistor R5, a first comparator A1 and a first threshold device; Specifically, the in-phase end of the first operational amplifier OP1 is connected to the second end of the interface of the chip to be tested and is connected to the inverting end of the first operational amplifier OP1, one end of the second resistor R2 and the ground end through the first resistor R1, the other end of the second resistor R2 is connected to the output end of the first operational amplifier OP1 and is connected to the in-phase end of the second operational amplifier OP2 and one end of the fourth resistor R4 through the third resistor R3, the other end of the fourth resistor R4 is connected to the output end of the third operational amplifier OP3 and is connected to the inverting end of the third operational amplifier OP3 and one end of the fifth resistor R5 through the first capacitor C1, the in-phase end of the third operational amplifier OP3 is grounded, the other end of the fifth resistor R5 is connected to the output end of the second operational amplifier OP2 and the inverting end of the first comparator A1, the in-phase end of the first comparator A1 is connected to the first threshold device, and the output end of the first comparator A1 is connected to the auxiliary protection module 8 and the monitoring and early warning board module 6.

[0026] In a specific embodiment, the first resistor R1 forms a current detection circuit to perform current detection on the chip to be tested connected to the chip to be tested interface; the first operational amplifier OP1, the second operational amplifier OP2 and the third operational amplifier OP3 can all use OP07 operational amplifiers, and cooperate with the second resistor R2, the third resistor R3, the fourth resistor R4, the third operational amplifier OP3, the first capacitor C1 and the fifth resistor R5 to form a signal processing circuit, wherein the first operational amplifier OP1 performs in-phase amplification processing, and the second operational amplifier OP2 and the third operational amplifier OP3 convert the sampled signal into a differential signal; the first comparator A1 can use an LM397 comparator, and cooperate with the first threshold device to form a short-circuit comparison circuit, wherein the first threshold device provides a short-circuit threshold.

[0027] Further, the second transmission module 5 includes an eighth resistor R8, a second power tube Q2 and a sixth switch tube VT6; the monitoring and early warning card module 6 includes a monitoring and early warning card; Specifically, the drain of the second power tube Q2 is connected to the second end of the power supply regulating device and is connected to the gate of the second power tube Q2 and the collector of the sixth switch tube VT6 through the eighth resistor R8. The emitter of the sixth switch tube VT6 is grounded. The source of the second power tube Q2 is connected to the first end of the monitoring and early warning board. The second end of the monitoring and early warning board is connected to the short-circuit self-locking control module 7. The third end of the monitoring and early warning board is connected to the false trigger protection module 10. The fourth end of the monitoring and early warning board is connected to the output end of the first comparator A1.

[0028] In a specific embodiment, the above-mentioned second power tube Q2 can be an N-channel enhancement MOS tube, which cooperates with the eighth resistor R8 and the sixth switch tube VT6 to form a second transmission circuit, wherein the sixth switch tube VT6 can be an NPN transistor; the above-mentioned monitoring and early warning board can be composed of MCU to complete signal reception, monitoring and module control, and perform short-circuit judgment, which will not be elaborated here.

[0029] Further, the short-circuit self-locking control module 7 includes a short-circuit detection device, a first inverter J1 and a third switch tube VT3; Specifically, the first end of the short-circuit detection device is connected to the second end of the monitoring and early warning board, the second end of the short-circuit detection device and the emitter of the third switch tube VT3 are both grounded, the third end of the short-circuit detection device is connected to the collector of the third switch tube VT3 and the input end of the first inverter J1, and the output end of the first inverter J1 is connected to the base of the third switch tube VT3, the base of the sixth switch tube VT6, the alarm module 9 and the auxiliary protection module 8.

[0030] In a specific embodiment, the circuit composition structure of the above-mentioned short-circuit detection device can adopt a short-circuit detection circuit composed of a first resistor R1, a second resistor R2, a first operational amplifier OP1, a third resistor R3, a fourth resistor R4, a second operational amplifier OP2, a third operational amplifier OP3, a first capacitor C1, a fifth resistor R5, a first comparator A1 and a first threshold device, which will not be elaborated here; the above-mentioned third switch tube VT3 can select an NPN type transistor, which can perform signal self-locking control in conjunction with the first inverter J1.

[0031] Further, the alarm module 9 includes a ninth resistor R9, a fourth switch tube VT4 and an alarm device; Specifically, the base of the fourth switch tube VT4 is connected to the output end of the first inverter J1 through the ninth resistor R9, the emitter of the fourth switch tube VT4 is grounded, the collector of the fourth switch tube VT4 is connected to one end of the alarm device, and the other end of the alarm device is connected to the third end of the power supply regulating device.

[0032] In a specific embodiment, the alarm device may be a loudspeaker; the fourth switch tube VT4 may be an NPN transistor.

[0033] Further, the false trigger protection module 10 includes a tenth resistor R10, a fifth switch tube VT5 and a second diode D2; Specifically, the base of the fifth switch tube VT5 is connected to the output end of the first inverter J1 through the tenth resistor R10, the emitter of the fifth switch tube VT5 is grounded, the collector of the fifth switch tube VT5 is connected to the anode of the second diode D2 and the third end of the monitoring and early warning board, and the cathode of the second diode D2 is connected to the base of the first switch tube VT1.

[0034] In a specific embodiment, the fifth switch tube VT5 can be an NPN transistor; the second diode D2 is used for signal transmission.

[0035] Further, the auxiliary protection module 8 includes a first controller U1, a second capacitor C2, a third capacitor C3, a second switch tube VT2, a sixth resistor R6 and a first diode D1; Specifically, the eighth end of the first controller U1, the collector of the second switch tube VT2 and one end of the sixth resistor R6 are all connected to the fourth end of the power supply regulating device, the other end of the sixth resistor R6 is connected to the seventh end and the sixth end of the first controller U1 and is grounded through the second capacitor C2, the first end of the first controller U1 is grounded, the fifth end of the first controller U1 is grounded through the third capacitor C3, the second end of the first controller U1 is connected to the output end of the first comparator A1, the emitter of the second switch tube VT2 is connected to the fourth end of the first controller U1, the third end of the first controller U1 is connected to the anode of the first diode D1, and the cathode of the first diode D1 is connected to the base of the first switch tube VT1.

[0036] In a specific embodiment, the first controller U1 can adopt a NE555 integrated circuit, and cooperate with the second capacitor C2, the third capacitor C3, the second switch tube VT2, the sixth resistor R6 and the first diode D1 to form an auxiliary protection circuit. When the second switch tube VT2 is turned on and the second end of the first controller U1 is at a low level, the timing work starts.

[0037] In a short-circuit protection system of a chip reliability monitoring and early warning card of the present embodiment, electric energy is connected by a power supply interface, voltage regulation and multi-channel output processing are performed by a power supply regulating device, a first power tube Q1 and a second power tube Q2 are turned on, and power is supplied to the chip interface to be tested and the monitoring and early warning card respectively, a current sampling is performed by a first resistor R1, a first operational amplifier OP1 cooperates with a second resistor R2 and a third resistor R3 to perform in-phase amplification, a second operational amplifier OP2 cooperates with a fourth resistor R4, a third operational amplifier OP3, a first capacitor C1 and a fifth resistor R5 to perform signal conversion, a first comparator A1 cooperates with a first threshold device to perform short-circuit comparison, when a short circuit occurs, the first comparator A1 will output a low level, at this time, if the monitoring and early warning card works normally, the monitoring and early warning card will control the first switch tube VT1 to be turned on through the second diode D2, so that the first power tube Q1 is turned off, and similarly, a short-circuit detection device performs short-circuit detection on the monitoring and early warning card, and when a short circuit occurs, the first comparator A1 will output a low level, and ... a first comparator A1 will output a low level, and at this time, a first comparator A1 will output a low level, and at this time, when a short circuit occurs, the first comparator A1 will output a low level, and at this time, if the monitoring and early warning card works normally, the monitoring and early warning card will control the first switch tube VT1 to be turned on through the second diode D2, When a short circuit occurs, a low level is output, and after being inverted by the first inverter J1, the third switch tube VT3, the second switch tube VT2, the fourth switch tube VT4, the fifth switch tube VT5 and the sixth switch tube VT6 are controlled to be turned on, the second power tube Q2 is turned off, the monitoring and early warning board stops working, the third switch tube VT3 cooperates with the first inverter J1 to self-lock, the fifth switch tube VT5 pulls down the third terminal potential of the monitoring and early warning board to avoid false triggering of the monitoring and early warning board, the fourth switch tube VT4 controls the alarm device to alarm, the second switch tube VT2 triggers the first controller U1 to work, and the potential state of the second end of the first controller U1 is used for protection control to ensure that when a short circuit occurs at the interface of the chip to be tested, the conduction of the first switch tube VT1 is controlled, and the power-off of the first power tube Q1 is controlled. At the same time, after the timing of the first controller U1 ends, the first power tube Q1 will be turned on again. If the interface of the chip to be tested is still in a short circuit state, the power-off protection work will be re-entered.

[0038] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0039] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0040] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0041] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0042] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0043] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc. Various media that can store program codes.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A short circuit protection system for a chip reliability monitoring and early warning board, characterized in that: include: A power supply module, a first transmission module, a chip module to be tested, a short circuit detection module, a second transmission module, a monitoring and early warning board module, a short circuit self-locking control module, an auxiliary protection module, an alarm module and a false trigger protection module; The power module is used to receive electric energy, regulate the received electric energy and realize multi-channel output; The first transmission module is connected to the power module, the chip module to be tested, the false trigger protection module and the auxiliary protection module; the first transmission module transmits the electric energy output by the power module to the chip module to be tested; the first transmission module receives the first protection signal output by the false trigger protection module and the second protection signal output by the auxiliary protection module and stops the transmission of electric energy; The chip module to be tested is used to receive the electric energy output by the first transmission module; The short circuit detection module is connected to the chip module to be tested; the short circuit detection module performs current detection on the chip module to be tested and converts and amplifies the detected signal; Setting a first short-circuit threshold by means of the short-circuit detection module; The second transmission module is connected to the power module, the monitoring and early warning card module and the short-circuit self-locking control module; the second transmission module transmits the electric energy output by the power module to the monitoring and early warning card module; at the same time, the second transmission module receives the third protection signal output by the short-circuit self-locking control module; The monitoring and early warning card module is connected to the short-circuit detection module; the monitoring and early warning card module receives the electric energy output by the second transmission module; at the same time, the monitoring and early warning card module receives the first short-circuit signal and outputs a fourth protection signal; the monitoring and early warning card module transmits the fourth protection signal to the false trigger protection module; The short-circuit self-locking control module is connected to the monitoring and early warning board module; when the chip module to be tested is short-circuited, the short-circuit self-locking control module self-locks and outputs a second short-circuit signal to the auxiliary protection module; The auxiliary protection module is connected to the short-circuit self-locking control module; the auxiliary protection module receives the second short-circuit signal; the auxiliary protection module periodically outputs the second protection signal to the first transmission module; The alarm module is connected to the short-circuit self-locking control module and receives a second short-circuit signal; The false trigger protection module is connected to the monitoring and early warning board module and the short circuit self-locking control module; the false trigger protection module receives the fourth protection signal and isolates and outputs the first protection signal; The false trigger protection module receives the second short circuit signal and stops receiving the fourth protection signal.

2. The short-circuit protection system of a chip reliability monitoring and early warning board according to claim 1 is characterized in that: The power module includes: a power interface and a power regulator; the first transmission module includes: a first power tube, a seventh resistor and a first switch tube; the chip under test module includes: a chip under test interface; The power interface is connected to the input end of the power regulation device; the first output end of the power regulation device is connected to the drain of the first power tube and is connected to the gate of the first power tube and the collector of the first switch tube through the seventh resistor; the emitter of the first switch tube is grounded; the base of the first switch tube is connected to the false trigger protection module and the auxiliary protection module; the source of the first power tube is connected to the first end of the chip interface to be tested, and the second end of the chip interface to be tested is connected to the short circuit detection module.

3. The short-circuit protection system of a chip reliability monitoring and early warning board according to claim 1 is characterized in that: The short circuit detection module includes: a first resistor, a second resistor, a first operational amplifier, a third resistor, a fourth resistor, a second operational amplifier, a third operational amplifier, a first capacitor, a fifth resistor, a first comparator and a first threshold device; The in-phase end of the first operational amplifier is connected to the second end of the interface of the chip to be tested and is connected to the inverting end of the first operational amplifier, one end of the second resistor and the ground through the first resistor; the other end of the second resistor is connected to the output end of the first operational amplifier and is connected to the in-phase end of the second operational amplifier and one end of the fourth resistor through the third resistor; the other end of the fourth resistor is connected to the output end of the third operational amplifier and is connected to the inverting end of the third operational amplifier and one end of the fifth resistor through the first capacitor; the in-phase end of the third operational amplifier is grounded; the other end of the fifth resistor is connected to the output end of the second operational amplifier and the inverting end of the first comparator, the in-phase end of the first comparator is connected to the first threshold device, and the output end of the first comparator is connected to the auxiliary protection module and the monitoring and early warning board module.

4. The short-circuit protection system of a chip reliability monitoring and early warning board according to claim 1 is characterized in that: The second transmission module includes: an eighth resistor, a second power tube and a sixth switch tube; the monitoring and early warning card module includes: a monitoring and early warning card; The drain of the second power tube is connected to the second end of the power supply regulating device and is connected to the gate of the second power tube and the collector of the sixth switch tube through the eighth resistor. The emitter of the sixth switch tube is grounded. The source of the second power tube is connected to the first end of the monitoring and early warning board; the second end of the monitoring and early warning board is connected to the short-circuit self-locking control module; the third end of the monitoring and early warning board is connected to the false trigger protection module; the fourth end of the monitoring and early warning board is connected to the output end of the first comparator.

5. The short-circuit protection system of a chip reliability monitoring and early warning board according to claim 1 is characterized in that: The short-circuit self-locking control module includes: a short-circuit detection device, a first inverter and a third switch tube; The first end of the short-circuit detection device is connected to the second end of the monitoring and early warning board; the second end of the short-circuit detection device and the emitter of the third switch tube are both grounded; the third end of the short-circuit detection device is connected to the collector of the third switch tube and the input end of the first inverter; the output end of the first inverter is connected to the base of the third switch tube, the base of the sixth switch tube, the alarm module and the auxiliary protection module.

6. The short-circuit protection system of a chip reliability monitoring and early warning board according to claim 1 is characterized in that: The alarm module comprises: a ninth resistor, a fourth switch tube and an alarm device; The base of the fourth switch tube is connected to the output end of the first inverter through a ninth resistor, the emitter of the fourth switch tube is grounded, the collector of the fourth switch tube is connected to one end of the alarm device, and the other end of the alarm device is connected to the third end of the power supply regulating device.

7. The short-circuit protection system of a chip reliability monitoring and early warning board according to claim 1 is characterized in that: The false trigger protection module includes a tenth resistor, a fifth switch tube and a second diode; The base of the fifth switch tube is connected to the output end of the first inverter through the tenth resistor, the emitter of the fifth switch tube is grounded, the collector of the fifth switch tube is connected to the anode of the second diode and the third end of the monitoring and early warning board, and the cathode of the second diode is connected to the base of the first switch tube.

8. The short-circuit protection system of a chip reliability monitoring and early warning board according to claim 1 is characterized in that: The auxiliary protection module includes: a first controller, a second capacitor, a third capacitor, a second switch tube, a sixth resistor and a first diode; The eighth end of the first controller, the collector of the second switch tube and one end of the sixth resistor are all connected to the fourth end of the power supply regulating device, the other end of the sixth resistor is connected to the seventh end and the sixth end of the first controller and is grounded through the second capacitor, the first end of the first controller is grounded, the fifth end of the first controller is grounded through the third capacitor, the second end of the first controller is connected to the output end of the first comparator, the emitter of the second switch tube is connected to the fourth end of the first controller, the third end of the first controller is connected to the anode of the first diode, and the cathode of the first diode is connected to the base of the first switch tube.

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