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

Description:

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: