Patent ID: 8179096
Filing Date: 2012-05-15
Classification: H02J

Abstract:
1. A method of forming a battery protection circuit comprising: configuring a plurality of transistors of a first conductivity type to receive a charging voltage from a voltage source and responsively couple a battery to the charging voltage at least a portion of a first time when the charging voltage is greater than approximately zero volts and is less than a first voltage; configuring the plurality of transistors to responsively decouple the battery from the charging voltage at least a portion of a second time when the charging voltage is less than approximately zero volts; configuring the plurality of transistors to decouple the battery from the charging voltage at least a portion of a third time when the charging voltage is no less than the first voltage; and coupling a first current carrying electrode of a first transistor of a second conductivity type to a control electrode of at least a first transistor of the plurality of transistors and to a second current carrying electrode of a second transistor of the plurality of transistors, coupling a control electrode of the first transistor of the second conductivity type to the control electrode of the second transistor of the plurality of transistors.