Computer Smps Circuit Diagram. Its construction is typical for a modern computer psu with mosfet switches and active power factor correction pfc. The working of smps is simply understood by knowing that the transistor used in lps is used to control the voltage drop while the transistor in smps is used as a controlled switch.
The output rectification and filter are isolated from the high frequency switching section by a high frequency transformer and voltage control feedback is via an opto isolator. The diagram below shows a partial schematic of a 450 watt atx power supply. Main three parts of this simple smps circuit are tny267 tiny switch ii family ic from power integrations.
The diagram below shows a partial schematic of a 450 watt atx power supply.
It is enhanced energy efficient and low power offline switching device. It is enhanced energy efficient and low power offline switching device. Its construction is typical for a modern computer psu with mosfet switches and active power factor correction pfc. In this tutorial we will learn how to build a 12v smps circuit that would convert ac mains power to 12v dc with a maximum current rating of 1 25a.
