Patent Number: 6,297,617

Title: Battery charger and charge control circuit

Abstract: A switch is controlled by a charging control unit. An inductor is provided between the switch and a secondary battery. An offset generation unit generates voltage V2 by adding an offset voltage V.sub.os to voltage V1, where the voltage V1 corresponds to an inductor current. A current detection unit detects the inductor current based on the voltage V2. A voltage detection unit detects output voltage V.sub.out. A charging control unit controls the switch based on the inductor current detected by the current detection unit and the output voltage V.sub.out detected by the voltage detection unit.

Inventors: Aoyama; Takashi (Aichi-ken, JP)

Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

International Classification: H02M 3/04 (20060101); H02J 7/04 (20060101); H02J 7/02 (20060101); H02M 3/158 (20060101); H02J 007/00 ()

Expiration Date: 10/02/2018