The invention provides a constant-current control circuit and an automobile low-voltage constant-current system. The constant-current control circuit comprises an error signal generation circuit, a constant-voltage voltage source and an error signal conversion circuit, a resistor R3 is connected in series between the error signal generation circuit and the constant voltage source, the error signal generation circuit generates an error signal by comparing the voltage difference on the resistor R3 with the reference voltage generated by the constant voltage source, and the error signal conversion circuit negates the error signal and then outputs the error signal. The constant current control circuit is connected with a high-end differential voltage signal, directly processes and outputs an error signal of the error amplifier, avoids current distortion, and is high in flexibility and low in cost.
本发明提供了一种恒流控制电路及汽车低压恒流系统,包括:误差信号生成电路、恒压电压源以及误差信号转换电路;所述误差信号生成电路与恒压电压源之间串联有电阻R3,所述误差信号生成电路通过比较电阻R3上的压差与恒压电压源产生的基准电压产生一个误差信号,所述误差信号转换电路将误差信号取反后进行输出。本发明中的恒流控制电路连接高端的差分电压信号,直接处理输出误差放大器的误差信号,避免了电流的失真,并且灵活性高,成本低。
Constant-current control circuit and automobile low-voltage constant-current system
恒流控制电路及汽车低压恒流系统
2022-05-17
Patent
Elektronische Ressource
Chinesisch
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