The invention discloses an anti-reverse-connection power supply circuit and a vehicle. The circuit comprises a field effect transistor, a first anti-reverse-connection circuit, a second anti-reverse-connection circuit and a third anti-reverse-connection circuit. The source end of the field effect transistor is connected with one end of the first anti-reverse-connection circuit, the gate end of the field effect transistor is connected with one end of the third anti-reverse-connection circuit, and the field effect transistor is connected with the second anti-reverse-connection circuit; the other end of the first anti-reverse-connection circuit is connected with the third anti-reverse-connection circuit, the other end of the third anti-reverse-connection circuit is connected with the second anti-reverse-connection circuit, and the first anti-reverse-connection circuit is connected with the second anti-reverse-connection circuit; in response to an abnormal electric signal representing negative voltage feed-in, the second anti-reverse-connection circuit is in an off state, and the first anti-reverse-connection circuit and the third anti-reverse-connection circuit are in an on state, so that the field effect transistor is in an off state. According to the technical scheme provided by the invention, the damage of negative electricity feed-in to the vehicle-mounted electric appliance can be prevented, and the switching-off efficiency of the field effect transistor is improved.
本申请公开一种防反接供电电路及车辆,该电路包括:场效晶体管、第一防反接电路、第二防反接电路和第三防反接电路;场效晶体管的源端与第一防反接电路的一端连接,场效晶体管的栅端与第三防反接电路的一端连接,场效晶体管与第二防反接电路连接;第一防反接电路的另一端与第三防反接电路连接,第三防反接电路另一端与第二防反接电路连接,第一防反接电路与第二防反接电路连接;响应于表征负压馈入的异常电信号,第二防反接电路处于断开的状态,第一防反接电路和第三防反接电路处于导通的状态,以使场效晶体管处于断开的状态。利用本申请提供的技术方案可以防止负电馈入对车载电器的损坏,提高场效晶体管断开的效率。
Reverse connection prevention power supply circuit and vehicle
一种防反接供电电路及车辆
2022-07-29
Patent
Electronic Resource
Chinese
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