Design of New Push-pull Isolation Transformer Drive Circuit Based on Single-chip Microcomputer

Abstract

To solve the problems of low accuracy of complementary signal dead time control and insufficient driving capacity of existing push-pull isolation transformers, it is explored how the drain voltage of the primary side switch transistor affects the output power. As a result, a new push-pull isolation transformer driving circuit based on a single-chip microcomputer is proposed with its core control circuit. An improved charge pump boost circuit and a simulation model is built in Multiusum, and experimental data demonstrate the effectiveness of the circuit design.