Snubber Circuits Suppress Voltage Transient Spikes in DC-DC Flyback Converter Supplies

Abstract: The flyback dc-dc converter topology results in significant cost and space savings for multiple output power supplies with high output voltage for power levels up to 100W. Flyback topologies store and transfer energy using a transformer, which due to physical limitations can cause large voltage transient spikes during the switching cycle. This article outlines the design of dissipative voltage suppression circuits (voltage snubbers) that can be used to suppress these transients on both the primary and secondary side.