Low power power converter circuit diagram

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description:

This circuit can be used to change the power supply, and the potentiometer RP can control the duty cycle of the output square wave. The circuit is as shown. It consists of an integrated block IC, a field effect transistor VT, and a RC component.

The integrated block IC is a Schmitt trigger, and a multi-vibrator is formed with a RC component, and a square wave pulse signal of 200 kHz is output to drive the FET VT. When the VT tube is turned on, the power supply first converts a part of the energy to the secondary through the transformer and supplies it to the load RL. After the FET VT is turned off, a part of the energy stored in the magnetic field is also transferred to the secondary of the transformer to continue to supply the load. The efficiency is reduced when the power supply is lower than 15V.