Summary: The flyback converter shown in the figure uses the TNY275PN (U1) to provide two outputs: 5V/250 mA and 14 V/350 mA. Typical applications are residential heating controllers (furnaces) or other applications that require two outputs. The value of C11 determines the use of U1's increased current limit and can output 9.65 W of power. design feature See the PDF document for details (click on the PDF file to download) Commercial Semi-hermetic Compressor Sight Glasses Shenzhen Capitol Micro-Electronics Co.,LTD , https://www.capitolgtms.com