Charge/discharge control circuit and battery device

Abstract

Provided is a battery device including, in a charge/discharge protection circuit for controlling charge/discharge of a secondary battery by a single bidirectionally conductive field effect transistor, a charge/discharge control circuit with which the layout area is reduced and a leakage current of the bidirectionally conductive field effect transistor is reduced to perform stable operation. The charge/discharge control circuit includes: a switch circuit for controlling a gate of the bidirectionally conductive field effect transistor based on an output of a control circuit for controlling the charge/discharge of the secondary battery; and two Schottky barrier diodes for preventing back-flow of a charge current and a discharge current. The first Schottky barrier diode has a cathode connected to a drain of the bidirectionally conductive field effect transistor, and the second Schottky barrier diode has a cathode connected to a source of the bidirectionally conductive field effect transistor.

Dependencies are inferred from the claim text.