The invention provides a low-voltage power supply power-down protection circuit and a low-voltage power supply power-down protection device. The low-voltage power supply power-down protection circuitcomprises a first power supply input end communicated with a first low-voltage power supply, a second power supply input end communicated with a second low-voltage power supply, a comparison switch circuit and an execution circuit, a first comparison end of the comparison switch circuit is connected with the first power supply input end, a second comparison end of the comparison switch circuit isconnected with the second power supply input end, a power supply input end of the comparison switch circuit is communicated with a first low-voltage power supply, and a power supply output end of thecomparison switch circuit is connected with a power supply end of the execution circuit. According to the technical scheme, the technical problem that an insulated gate bipolar transistor is damaged due to the fact that an electric driving system executes active short-circuit operation when a low-voltage power supply is powered off can be solved.
本发明提供一种低压电源掉电保护电路及低压电源掉电保护装置,该低压电源掉电保护电路包括与第一低压电源连通的第一电源输入端、与第二低压电源连通的第二电源输入端、比较开关电路和执行电路;比较开关电路的第一比较端与第一电源输入端连接,比较开关电路的第二比较端与第二电源输入端连接,比较开关电路的电源输入端与第一低压电源连通,比较开关电路的电源输出端与执行电路的电源端连接。本发明的技术方案,能够解决低压电源掉电时电驱动系统执行主动短路操作导致绝缘栅双极型晶体管损坏的技术问题。
Low-voltage power supply power-down protection circuit and low-voltage power supply power-down protection device
低压电源掉电保护电路及低压电源掉电保护装置
2020-10-23
Patent
Electronic Resource
Chinese
Power supply voltage transient analysis and protection
Tema Archive | 1976
|European Patent Office | 2020
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