Abstract: A power converter is disclosed. According to various embodiments, the power converter includes a transformer, a bridge input circuit, a self-driven synchronous rectifier circuit, a gate drive circuit, and a gate drive shutdown circuit. The transformer includes a primary winding connected to the bridge input circuit, a first secondary winding, and a second secondary winding. The self-driven synchronous rectifier circuit is connected to the first secondary winding and includes a first synchronous rectifier for rectifying a voltage across the first secondary winding. The first synchronous rectifier includes a control terminal responsive to a voltage across the second secondary winding. The gate drive circuit includes a first diode connected to the control terminal of the first synchronous rectifier for introducing a dc level shift thereto.