Low side N-channel FET protection circuit

Details Low side N-channel FET protection circuit Low side N-channel FET protection circuit

2007-09-18

2010-11-09

Tso, Edward (Department: 2858)

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

C320S132000, C320S135000, C320S149000, C320S163000, C324S426000, C324S428000, C324S432000, C324S433000, C324S434000, C340S636100, C340S636210, C361S018000, C361S084000, C361S087000, C361S093100, C361S100000, C307S010700, C379S323000

Reexamination Certificate

active

07830120

ABSTRACT:
The present invention relates to a battery protection circuit for protecting a plurality of batteries connected in series. The battery protection circuit includes: a controller for monitoring the batteries and outputting control signals based on predetermined conditions associated with the batteries; a first N-channel MOSFET and a second N-channel MOSFET coupled in a common-drain configuration in a low-side path, wherein at least one of the first and second N-channel MOSFETs turns off in response to the control signal received from the controller when at least one of the predetermined conditions is detected; and a gate protection circuit for preventing gate-to-source voltages of the first and second N-channel MOSFETs from exceeding a predetermined gate-to-source voltage level.

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