Charging Circuit Having Smooth Charging Transition Mode

摘要

A charging circuit includes a current mirror block configured to charge a load in response to a control voltage applied thereto, and a charge controller configured to generate the control voltage in response to comparison result values obtained by comparing a current sensing value and a voltage sensing value of the current mirror block with respective reference values. The comparison result value are applied to the gates of MOS transistors connected in series. The charge controller is configured to switch a charge mode from a constant current charge mode to a constant voltage charge mode when the charge state of the load reaches a predetermined state.