Patent ID: 7423410
Filing Date: 2008-09-09
Classification: H02J

Abstract:
1. Battery protecting circuit comprising: battery protecting circuit controling ON/OFF of a first switching circuit inserted in a first power feeding path between an external power source and a battery, and it has the following circuits: a first switch driver generating a first driving voltage by boosting the voltage generated in said first power feeding path corresponding to an input control signal, and turns ON said first switching circuit with said first driving voltage; a second switch driver generating a second driving voltage lower than the voltage generated in a second power feeding path between said external power source and said battery corresponding to the input control signal, and turns ON a second switching circuit inserted in said second power feeding path with the second driving voltage; and a controller outputing said control signal such that when the voltage of said battery reaches the voltage needed for the boosting operation of said first switch driver, said first switch driver stops the boosting operation, and said second switch driver generates said second driving voltage.