This is the "switching" part of the SMPS (Switched-Mode Power Supply). High-speed chop the DC voltage into a high-frequency square wave. This high frequency allows the use of a much smaller transformer than traditional linear power supplies. 4. The Main Transformer and Secondary Side
An integrated circuit that regulates the switching frequency. d10240p1a schematic work
: Features an EMI filter and bridge rectifier to convert 100-240V AC to high-voltage DC. This is the "switching" part of the SMPS