The invention provides an overvoltage protection circuit, a vehicle-mounted terminal and a commercial vehicle. The overvoltage protection circuit is used for a power supply input port of the vehicle-mounted terminal and comprises a first switch tube, wherein the first end of the first switch tube is connected with the output end of the overvoltage protection circuit, and the second end of the first switch tube is connected with the input end of the overvoltage protection circuit; a voltage detection unit which is used for detecting the voltage of the first end of the first switch tube; and a conditioning unit which is used for adjusting the voltage of the control end of the first switch tube according to the voltage detection unit, so the voltage of the first end of the first switch tube is in a first preset range.
本申请提供了一种过压保护电路、车载终端和商用车。其中过压保护电路,用于车载终端电源输入端口,包括:第一开关管,所述第一开关管的第一端与所述过压保护电路的输出端连接,所述第一开关管的第二端与所述过压保护电路的输入端连接;电压检测单元,检测所述第一开关管的第一端的电压;调理单元,根据所述电压检测单元调节所述第一开关管的控制端的电压,使得所述第一开关管的第一端的电压处于第一预设范围。
Overvoltage protection circuit, vehicle-mounted terminal and commercial vehicle
一种过压保护电路、车载终端及商用车
2021-11-23
Patent
Electronic Resource
Chinese
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