A Start-up Circuit and Control for Isolated Boost DC/DC Converters

This invention is to overcome the start-up surge current problem of isolated boost converters.  In boost converters, the output voltage must be higher than the input voltage.  However, the initial output voltage normally starts from zero, and a surge current will occur that can easily damage the entire converter.  The invention functions like a flyback converter so that the surge current will not occur.  After the output voltage is established, the converter will change its control function and return to boost converter operation.
Patent Information:
App Type Country Serial No. Patent No. File Date Issued Date Patent Status
US Utility *United States 09/866,304 6,587,356 5/24/2001 7/1/2003 Issued
For Information, Contact:
Li Chen
Licensing Associate
Virginia Tech Intellectual Properties, Inc.
(540) 443-9217
Lizhi Zhu
Fred Lee
Jih-Sheng (Jason) Lai
Environment/Fuel Cell