Patent ID: 7656119
Filing Date: 2010-02-02
Classification: H02J

Abstract:
1. An electric charging protection circuit in a mobile communication terminal having an installed battery, comprising: a charger integrated circuit controlling an electric charging of the installed battery with an electric charging power via an adaptor or a receptacle; a control unit deciding whether the installed battery is a correct battery by recognizing a serial number of the installed battery, the control unit outputting a control signal for controlling the electric charging according to a result of the decision; a switching circuit switching a supply of an electric charging power applied to the installed battery according to the control signal of the control unit; and an overvoltage protection circuit configured to protect the charger integrated circuit and the installed battery from an overvoltage of the electric charging power provided via the adapter or the receptacle, wherein the overvoltage protection circuit disconnects the electric charging power provided from the adaptor or the receptacle when an electric charging power voltage is greater than a predetermined voltage, wherein the overvoltage protection circuit comprises: