Drive circuit for synchronous rectifiers in isolated forward con

Details Drive circuit for synchronous rectifiers in isolated forward con Drive circuit for synchronous rectifiers in isolated forward con

1999-06-04

2000-05-09

Nguyen, Matthew

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

H02M 3335

Patent

active

06061255&

ABSTRACT:
A forward converter circuit that includes synchronous rectifiers as the forward and freewheeling rectifying elements in the output stage. The forward converter also includes a drive circuit for the synchronous rectifiers. The drive circuit includes an auxiliary secondary winding on the power transformer which is used to generate the gate control signal for the forward synchronous rectifier and an auxiliary winding on the output inductor which is used to generate the gate control signal for the freewheeling synchronous rectifier. An auxiliary switch is used to turn off the freewheeling rectifier, with the switch operating in response to the gate drive signal for the power switch.

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