Synchronous rectifier driver circuit rectifier

摘要

A synchronous rectifier includes a primary rectifier circuit and a secondary rectifier circuit. The primary rectifier circuit is configured to produce first and second half-rectified signals from respective first and second primary voltage outputs of a first transformer winding. The secondary rectifier circuit is configured to rectify a voltage output of a second transformer winding in response to first and second transistor gate inputs. A first buffer driver is configured to receive the first half-rectified signal and to provide a first buffered control signal to the first transistor gate input. A second buffer driver is configured to receive the second half-rectified signal and to provide a second buffered control signal to the first transistor gate input.

主权项

1. A synchronous rectifier, comprising:
a primary rectifier circuit configured to receive first and second primary voltage outputs of a first transformer winding and to produce a first half-rectified signal and a second half-rectified signal therefrom; a secondary rectifier circuit configured to rectify a voltage output of a second transformer winding in response to a first transistor gate input and a second transistor gate input; a first buffer driver configured to receive said first half-rectified signal and to provide a first buffered control signal to said first transistor gate input; a second buffer driver configured to receive said second half-rectified signal and to provide a second buffered control signal to said second transistor gate input; a first clipping transistor configured to ground said first buffered control signal in response to said second half-rectified signal; and a second clipping transistor configured to ground said second buffered control signal in response to said first half-rectified signal.