Push-pull converter

A type of buck converter in which the primary and secondary sides are isolated by a transformer. It uses multiple switching devices, a separately excited oscillation method, and PWM control. It is mainly used as an AC-DC converter and operates similarly to a forward converter, but can supply more output power than a forward converter. Compared to other types of switching converters, it has the advantage of delivering higher power, but the disadvantage of having more components and a more complex circuit. It has two switches that alternately turn on and off at the same duty ratio to supply power to the load. Although no kickback voltage is generated, a voltage more than twice the input voltage is applied to the switches, requiring high-voltage-resistant switches. Therefore, it is often used in electrical and electronic equipment with low input voltage.