Patent ID: 7443701
Filing Date: 2008-10-28
Classification: H02M

Abstract:
1. A full bridge inverter connected to a first side of a transformer and converting a DC power to an AC power, said full bridge inverter comprising: a push/pull control chip having a first output terminal and a second output terminal, said first and second output terminals separately outputting a first control signal and a second control signal both with a duty cycle smaller than 50%; a first switch coupling to said first output terminal of said push/pull control chip; a first SCR switch having a gate coupling to said first switch and an anode coupling to said DC power; a first N-MOS having a gate coupling to a cathode of said first SCR switch and a drain coupling to said DC power and a source coupling to one terminal of said first side of said transformer; a second N-MOS having a gate coupling to said first output terminal of said push/pull control chip via a first buffer circuit and a drain coupling to said source of said first N-MOS and a source coupling to a reference terminal; a second switch coupling to said second output terminal of said push/pull control chip; a second SCR switch having a gate coupling to said second switch and an anode coupling to said DC power; a third N-MOS having a gate coupling to a cathode of said second SCR switch and a drain coupling to said DC power and a source coupling to another terminal of said first side of said transformer; and a fourth N-MOS having a gate coupling to said second output terminal of said push/pull control chip via a second buffer circuit and a drain coupling to said source of said third N-MOS and a source coupling to said reference terminal.