Patent ID: 7408796
Filing Date: 2008-08-05
Classification: H02M,Y02B

Abstract:
1. An integrated synchronous rectifier package comprising: a controlled switching device having two main current carrying terminals and a control terminal; the controlled switching device comprising a MOSFET having a conduction channel and a parasitic body diode; a control circuit for sensing the direction of current through the controlled switching device main current carrying terminals and for generating a control signal provided to the control terminal to turn on the controlled switching device when current flows in a first direction through the controlled switching device and to turn off the controlled switching device when current flows in a second opposite direction through the controlled switching device; and the control circuit and controlled switching device being contained within a single package having no more than four external electrical connections, further comprising a circuit for blanking the control signal for a time period to prevent a voltage that develops across the body diode from causing the control circuit to turn the controlled switching device back on after it has been turned off.