The invention relates to the technical field of new energy automobile circuits, in particular to a switching circuit. The device comprises a one-key starting switch, a power supply and a starting switch module, the starting switch module comprises a one-key starting circuit and a protection circuit, the one-key starting circuit is connected with the power supply and the one-key starting switch in series, and the one-key starting switch controls the one-key starting circuit to convey power supply current. The one-key starting circuit is used for starting the new energy automobile; and the protection circuit is connected with the one-key starting circuit and is used for protecting the one-key starting circuit. According to the over-current protection circuit, the potential at the NMOS transistor M3 is changed along with the change of the output voltage end Vout through the negative feedback circuit, so that the accurate sampling of the PMOS transistor M2 on the current flowing through the adjusting tube Mp is ensured, and the over-current protection reliability is improved.
本发明涉及新能源汽车电路技术领域,具体地说,涉及一种开关电路。其包括一键启动开关、电源和启动开关模块,启动开关模块包括一键启动电路和保护电路,其中:所述一键启动电路与电源和一键启动开关串联,通过一键启动开关控制一键启动电路对电源电流的输送,所述一键启动电路用于启动新能源汽车;所述保护电路与一键启动电路连接,用于对一键启动电路进行保护。本发明中通过负反馈电路使得NMOS晶体管M3处的电位随输出电压端Vout的变化而变化,从而保证了PMOS晶体管M2对流过调整管Mp电流的精确取样,提高了过流保护的可靠性。
Switching circuit
一种开关电路
2022-11-08
Patent
Electronic Resource
Chinese
Switching driving circuit, switching circuit, and power supply device
European Patent Office | 2020
|NTRS | 1987
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