Switch embedded integrated circuit and method for battery protection
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United States of America Patent
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Apr 9, 2013
Grant Date -
Jul 14, 2011
app pub date -
Dec 27, 2010
filing date -
Jan 11, 2010
priority date (Note) -
Expired
status (Latency Note)
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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.
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