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High Power Density Open-frame Type DC-DC Converter Module with Constant Current Control  

Lee Darl-Woo (청주대 전자공학과)
Ahn Tae-Young (청주대 정보통신공학부)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.10, no.4, 2005 , pp. 380-387 More about this Journal
Abstract
We report the performance of an open-frame type low-voltage high-current DC-DC converter module developed using an active clamp forward converter circuit and single ended rectifier. The converter module is designed with the specifications of an 3.3V output voltage, 30A output current, 100W output power and 36-75V input voltage. The synchronous rectifier is used to reduce the conduction loss at high current level and constant current control using precision PCB resistance is adapted to enhance the over current protection function in the system configuration. A prototype converter module is successfully implemented within 8mm height and quarter brick size (58x37mm) and recorded an $95W/in^3$ power density, 90.6$\%$ efficiency and 0.07$\%$ voltage regulation for the entire Input voltage range, thereby demonstrating its application potentials to future telecommunication electronics.
Keywords
Forward converter; Synchronous Rectifier; Constant current control; Soft switching;
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