Mitsumi Electric Company Ltd.

Seiji Miura

Akira Ikeuchi

Yukihiro Terada

A disclosed current detection circuit includes a current/voltage converting element for generating a voltage in accordance with an input current, a reference voltage generation circuit for generating a reference voltage, the reference voltage generation circuit having an element configuration for setting a predetermined temperature characteristic to the reference voltage, and a comparator for outputting an output signal in accordance with a magnitude relation between a voltage converted in the current/voltage converting element and the reference voltage generated in the reference voltage generation circuit.

Current detection circuit and protection circuit

A battery pack with a charge control function includes a charge protection circuit and a charge control circuit. The charge control circuit turns a discharge control switch on or off to control a discharge current which flows from a secondary battery to a load and also turns a charge control switch on or off to control a charge current which flows from a charger to the secondary battery. When an abnormal voltage is input, the charge control circuit turns the charge control switch on or off to stop the charging of the secondary battery through the charger.

Growing community of inventors

Atsugi, Japan

Seiji Miura