Abstract: A switch embedded integrated circuit for battery protection includes a MOSFET having a body diode, and a control logic circuit for switching the MOSFET and the direction of the body diode to control the charge current to and the discharge current from a battery. The control logic circuit turns off the MOSFET once any abnormal operation such as over-voltage and under-voltage happens, and turns on the MOSFET according to an OVPR threshold, an OVPR delay time, an UVPR threshold and an UVPR delay time. The OVPR threshold and the OVPR delay time are determined depending on the battery being coupled to a load or a charger, or floating.
Type:
Grant
Filed:
December 27, 2010
Date of Patent:
April 9, 2013
Assignee:
Richpower Microelectrics Corporation
Inventors:
Chin-Hui Wang, Zheng-Lin Pu, Ying-Jie Han, Hui Wang