Patent ID: 7414822
Filing Date: 2008-08-19
Classification: H05B

Abstract:
1. A current control circuit comprising: a current drawing terminal to which a primary coil of a transformer is connected; a first N channel transistor having a source connected to the current drawing terminal and having a body diode that directs a current from the source to a drain; and a second N channel transistor having a drain connected to the drain of the first N channel transistor and a source connected to a ground, the second N channel transistor having a body diode that directs a current from the source to the drain, and wherein the first and second N channel transistors are turned on to direct a current from the current drawing terminal to the ground via the first and second N channel transistors, and the first and second N channel transistors are turned off to stop the current from the current drawing terminal and to allow the body diode of the first N channel transistor to inhibit a current flowing from the ground to the primary coil of the transformer.