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发明授权
CN101373902B 充电电路以及其充电电流调整方法 有权

充电电路以及其充电电流调整方法
摘要：
本发明涉及二次充电电池的充电电路以及其充电电流的调整方法，能够更高精度地将对二次充电电池提供的充电电路控制在希望的值。电流-电压转换电路2将流过充电电流检测用电阻Rsen的电流转换为电压，生成监控电压CCMON；充电电流控制电路4对充电用晶体管M1的动作实行控制，以使得所述监控电压CCMON成为基准电压CCREF，所述基准电压CCREF是通过可变电阻R11与R12分压规定的恒压Vref生成的。通过可变地设定基准电压生成电路3的可变电阻R11与R12的各电阻值，能够可变地设定基准电压CCREF，所述基准电压CCREF作为用于使得充电电流ichg成为希望的电流值的设定值。
摘要（英）：

The invention relates to a charge-up circuit and a regulation means for its charge-up current, so that the charge-up current to charge up a secondary battery can be adjusted accurately to a desired current. A current-to-voltage conversion circuit 2 generates a charge-up-current monitor voltage CCMON by converting the charge-up current flowing through the resistor Rsen to a voltage. A charge-up current control circuit 4 controls the charge-up transistor M1 so that the monitor voltage CCMON becomes the reference voltage CCREF. The reference voltage CCREF can be set arbitrarily because the reference voltage CCREF is generated by dividing the constant voltage Vref with the variable resistors R11 and R12. Consequently, the reference voltage CCREF is used to set the charge-up current ichg as the desired current.

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