Analysis of quasi-resonant flyback converter with intrinsic safety output

Abstract

The paper analyzed influence of input voltage and load resistance on switching frequency, output ripple voltage and peak inductor current of quasi-resonant flyback converters in a given input voltage and load change range, summarized its change rule, and concluded minimum design value of inductance and output filter capacitor meeting with electrical requirements to make the maximum output short-circuit release the minimum energy.

Keywords

• intrinsic safety circuit
• quasi-resonant flyback converter
• switching frequency
• peak inductor current
• output ripple voltage
• the minimum design value of inductance
• the minimum design value of capac