The invention provides a low-side driving circuit suitable for an automobile. The low-side driving circuit suitable for the automobile comprises a driving control circuit and a driving output protection circuit which are connected with each other. Wherein the driving control circuit comprises a first comparator, the external control circuit is connected with the inverted input end of the first comparator through a first voltage division circuit, the state feedback circuit is connected with the in-phase input end of the first comparator, and the output end of the first comparator is connected with the internal control circuit. The driving output protection circuit comprises an MOSFET, an operational amplifier and a second comparator. According to the invention, a complex low-side driving function is realized through some basic electronic components, and a fault acquisition function and a hardware cut-off output protection function are realized. The circuit has strong portability, and can realize setting of different over-current protection thresholds by changing parameters of passive devices, thereby meeting requirements of different application scenes.
本发明提供一种适用于汽车的低边驱动电路。其中,适用于汽车的低边驱动电路包括相连接的驱动控制电路和驱动输出保护电路。其中,驱动控制电路包括第一比较器,外部控制线路通过第一分压线路与第一比较器的反相输入端连接,状态反馈线路与第一比较器的同相输入端连接,第一比较器的输出端接到内部控制线路。驱动输出保护电路包括MOSFET、运算放大器和第二比较器。本发明通过一些基础的电子元器件实现复杂的低边驱动功能,具有故障采集功能,硬件切断输出保护功能。此电路具有很强的可移植性,通过更改被动器件的参数,可以实现不同过流保护阈值的设置,满足不同应用场景的需求。
Low-side driving circuit suitable for automobile
适用于汽车的低边驱动电路
2022-11-22
Patent
Electronic Resource
Chinese
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