CN-224233675-U - Automobile load rejection test circuit based on X86 secondary power supply platform

Abstract

The utility model relates to an automobile load rejection test circuit based on an X86 secondary power supply platform, which comprises an ADC detection module, an MCU and an electronic fuse module, wherein the MCU is also connected with a switch control module, the switch control module is connected with the electronic fuse module, the switch control module comprises a MOS tube Q12 and a resistor R583, the resistor R583 is connected with a resistor R592 and a triode Q28, the triode Q28 is connected with the resistor R583, the triode Q28 is connected with a resistor R616 and is connected with the grid electrode of the MOS tube Q12, the source electrode of the MOS tube Q12 is connected with a resistor R324 and is connected with the electronic fuse module, and the electronic fuse module is also connected with an overvoltage protection module.

Inventors

• HUANG KEJUN

Assignees

• 深圳市智微智能科技股份有限公司

Dates

Publication Date

20260512

Application Date

20250514

Claims (7)

1. 1. The automobile load rejection test circuit based on the X86 secondary power supply platform is characterized by comprising an ADC detection module, an MCU and an electronic fuse module, wherein the ADC detection module is connected to the MCU, the MCU is further connected with a switch control module for controlling the switch of the electronic fuse module, the switch control module is connected with the electronic fuse module, the switch control module comprises a MOS tube Q12 and a resistor R583 connected with the MCU, the resistor R583 is connected with a resistor R592 and a triode Q28, the base electrode of the triode Q28 is connected with the resistor R583, the collector electrode of the triode Q28 is connected with a resistor R616 and is connected with the grid electrode of the MOS tube Q12, the resistor R616 is connected with an external power supply, the drain electrode of the MOS tube Q12 is grounded, the source electrode of the MOS tube Q12 is connected with a resistor R324 and is connected with the electronic fuse module, the resistor R324 is connected with the external power supply, and the electronic fuse module is further connected with an overvoltage protection module for rapidly closing the electronic fuse module.
2. 2. The automobile load rejection test circuit based on the X86 secondary power supply platform according to claim 1 is characterized in that the overvoltage protection module comprises a triode Q15 and a diode D19, wherein the base electrode of the triode Q15 is connected with the positive electrode of the diode D19, the negative electrode of the diode D19 is connected with a resistor R346 connected with an external power supply, and the collector electrode of the triode Q15 is connected with the electronic fuse module.
3. 3. The automobile load rejection test circuit based on the X86 secondary power supply platform according to claim 2 is characterized in that the overvoltage protection module further comprises a diode D32, the negative electrode of the diode D32 is connected with the collector electrode of the triode Q15 and the electronic fuse module, the positive electrode of the diode D32 is grounded, the positive electrode of the diode D19 is further connected with a resistor RP1, and the resistor RP1 is grounded.
4. 4. The automobile load rejection test circuit based on the X86 secondary power supply platform as claimed in claim 1 is characterized in that a collector of the triode Q28 is further connected with a capacitor CP8, a diode D20 and a resistor R617, and the capacitor CP8, the diode D20 and the resistor R617 are grounded.
5. 5. The automobile load rejection test circuit based on the X86 secondary power supply platform according to claim 1 is characterized in that the ADC detection module comprises a resistor R317 connected with an external power supply, the resistor R317 is connected with a resistor 362 and a capacitor PC267, the resistor 362 and the capacitor PC267 are grounded, and the resistor R317 is also connected with an MCU.
6. 6. The automobile load rejection test circuit based on the X86 secondary power supply platform according to claim 5 is characterized in that a diode D27 is further connected to the resistor R317, the negative electrode of the diode D27 is connected with the resistor R317, and the positive electrode of the diode D27 is grounded.
7. 7. The automobile load rejection test circuit based on the X86 secondary power supply platform according to claim 2 is characterized in that the triode Q28 and the triode Q15 are NPN type triodes, and the MOS tube Q12 is an N type MOS tube.

Description

Automobile load rejection test circuit based on X86 secondary power supply platform Technical Field The utility model relates to the field of automobile test circuits, in particular to an automobile load rejection test circuit based on an X86 secondary power supply platform. Background Along with the rapid development of automobile electronic technology, the early-stage vehicle-mounted host platform led by an ARM platform starts to appear on the market along with the rapid promotion of computing power and intelligence, particularly the vehicle-mounted CPU and the vehicle-mounted graphics card GPU of the INTEL for two years are sequentially pushed out, the market development prospect of the automobile host is huge, and the power supply of the X86 platform on the corresponding hardware design needs a circuit design scheme capable of passing through automobile EMC, particularly ISO7637 experiments. The X86 power supply current is very severe, and is a multiphase power supply, the core current reaches 66A, the core display current is 35A, and even the AUX current reaches 19A level, because the automobile standard power supply is 14.4V, particularly in EMC ISO7637-2 experiment load throwing experiment, the continuous voltage reaches higher voltage of 35V, the chip manufacturer cannot meet the requirement of the primary multiphase power supply of more than 15A automobile standard, and the requirement of experiment can be met only by adding the increased power DC-DC to stabilize to 12V voltage and inputting the power chip as a secondary power supply. Disclosure of utility model Aiming at the defects in the prior art, the automobile load rejection test circuit based on the X86 secondary power supply platform is provided. The technical scheme includes that the automobile load rejection test circuit based on the X86 secondary power supply platform comprises an ADC detection module, an MCU and an electronic fuse module, wherein the ADC detection module is connected to the MCU, the MCU is further connected with a switch control module for controlling the switch of the electronic fuse module, the switch control module is connected with the electronic fuse module, the switch control module comprises a MOS tube Q12 and a resistor R583 connected with the MCU, the resistor R583 is connected with a resistor R592 and a triode Q28, the base electrode of the triode Q28 is connected with the resistor R583, the collector electrode of the triode Q28 is connected with a resistor R616 and is connected with the grid electrode of the MOS tube Q12, the resistor R616 is connected with an external power supply, the drain electrode of the MOS tube Q12 is grounded, the source electrode of the MOS tube Q12 is connected with a resistor R324 and is connected with the electronic fuse module, and the electronic fuse module is further connected with an overvoltage protection module for rapidly closing the electronic fuse module. Preferably, the overvoltage protection module comprises a triode Q15 and a diode D19, wherein the base electrode of the triode Q15 is connected with the positive electrode of the diode D19, the negative electrode of the diode D19 is connected with a resistor R346 connected with an external power supply, and the collector electrode of the triode Q15 is connected with the electronic fuse module. Preferably, the overvoltage protection module further comprises a diode D32, the negative electrode of the diode D32 is connected with the collector electrode of the triode Q15 and the electronic fuse module, the positive electrode of the diode D32 is grounded, the positive electrode of the diode D19 is further connected with a resistor RP1, and the resistor RP1 is grounded. Preferably, the collector of the triode Q28 is further connected to a capacitor CP8, a diode D20 and a resistor R617, and the capacitor CP8, the diode D20 and the resistor R617 are all grounded. Preferably, the ADC detection module includes a resistor R317 connected to an external power source, the resistor R317 is connected to a resistor 362 and a capacitor PC267, both the resistor 362 and the capacitor PC267 are grounded, and the resistor R317 is further connected to the MCU. Preferably, the resistor R317 is further connected to a diode D27, a cathode of the diode D27 is connected to the resistor R317, and an anode of the diode D27 is grounded. Preferably, the transistor Q28 and the transistor Q15 are NPN transistors, and the MOS transistor Q12 is an N-type MOS transistor. The utility model has the beneficial effects that when the MCU is matched with the ADC detection module to detect that the voltage is greater than 16.5V, the experimental machine body enters a standby state, when the voltage is detected to be greater than 19.5V, the switch control module controls the electronic fuse module to be closed, so that the power supply DC-DC power supply chip is protected, when the voltage is detected to be greater than 23V, the overvoltage protection module direct