DC-DC converter comprises zero-voltage switching control circuit for driving output voltage filter capacitor and providing complementary driving signal to switches

摘要

A DC-DC converter includes a zero-voltage switching control circuit (SKi) which drives an output voltage filter capacitor (C2) to partially feed back storage energy to an input side by the operation of a transformer (T1), and provides a complementary driving signal to switches (Q1, Q2) in the converter when the switches reach a zero-voltage switching control condition, so as to control turned-off or turn-on time of the switches, enabling the switches to repeat the switching operation at zero-voltage again and again.