The invention relates to a switch circuit, an antenna power supply device and a vehicle. The switch circuit comprises a switch module, an overcurrent protection module and a control module, the first end of the overcurrent protection module is electrically connected with the power supply input end; the second end of the overcurrent protection module is electrically connected with the first end of the switch module; the second end of the switch module is electrically connected with the power supply output end; the third end of the overcurrent protection module and the control signal output end of the control module are electrically connected with the control end of the switch module. The overcurrent protection module is used for clamping the voltage difference between the control end and the first end of the switch module under the condition that the current of the power supply input end is greater than a preset current threshold value, and controlling the switch module to be switched off; the control module is used for controlling on and off of the switch module. According to the invention, the overcurrent protection module detects the current in the working process of the switching circuit, and carries out circuit protection when an abnormality occurs, thereby improving the safety of the circuit, and reducing the cost of the circuit.
本公开涉及一种开关电路、天线供电装置及车辆,开关电路包括:开关模块、过流保护模块和控制模块;过流保护模块的第一端与电源输入端电连接;过流保护模块的第二端与开关模块的第一端电连接;开关模块的第二端与电源输出端电连接;过流保护模块的第三端和控制模块的控制信号输出端均与开关模块的控制端电连接;过流保护模块用于在电源输入端的电流大于预设电流阈值的情况下,对开关模块的控制端与第一端之间的电压差进行钳位,控制开关模块断开;控制模块用于控制开关模块的开启与断开。本公开通过过流保护模块对开关电路工作中的电流进行检测,并在出现异常时进行电路保护,提高电路安全性,降低电路成本。
Switching circuit, antenna power supply device and vehicle
一种开关电路、天线供电装置及车辆
2024-11-22
Patent
Electronic Resource
Chinese
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