A Flyback converter is a simple switch-mode
power supply that can be used to generate a DC output
from either an AC or DC input. The converter switch is
the most critical part of any converter. The voltage
stress across the switch is a major issue as the high
voltage spikes occur due to interaction between its
output capacitance and the leakage inductance of the
transformer. These spikes can be reduced with various
snubbers like conventional tertiary winding, Resistor
Capacitor and Diode(RCD) snubber, energy
regenerative snubber and an active clamp snubber. This
paper aims to analyze and compare the voltage stress
across the MOSFET switch of Flyback converter with
various snubber circuits.
Keywords : Active clamp snubber; Energy regenerative snubber; Flyback converter; RCD snubber; Tertiary winding reset.