BATTERY CHARGER

摘要

A charging signal (Vi) responding to a charging current is inputted to one input terminal (-) of an operational amplifier (95) forming a comparator and a setting signal (Vr) corresponding to a setting current value is inputted to the other input terminal (+) of the operational amplifier (95). When the charging signal (Vi) is not higher than the setting signal (Vr), a charging stop signal is generated from the output terminal of the operational amplifier (95) to interrupt a switch unit (4). A starting signal (Vcc) larger than the setting signal (Vr) applied to the other input terminal (+) is applied to the one input terminal (-) of the operational amplifier (95) through a capacitor (94) till a prescribed time elapses from the start of a charging operation to generate a charging start signal from the output terminal of the- operational amplifier (95) and electrically conduct the switch unit (4).