low noise, efficient switching power supply circuit

Published:2011/7/9 3:40:00 Author:chopper | Keyword: low noise, efficient, switching, power supply circuit | From:SeekIC

The low noise, efficient switching power supply examples composed of soft switching circuit and synchronous rectification circuit is shown as picture.Power supply output is 16.5V/3A,conversion efficiency is 88%. Although this power is designed for 16.5V voltage laptops,you can make the output voltage between 3.3 ~ 20V through changing the secondary winding turns of transformer and other component parameters like R, C.If VT1 selects 100V voltage device, the output voltage can reach 30V. The efficiency will be 82% when output is 5V,and efficiency will be 90% when output is 30V.



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