Circuit and method for controlling DC-DC converter

申请公布号：US2006220631(A1)

申请号：US20050225186

申请日期：2005.09.14

申请公布日期：2006.10.05

申请人：

FUJITSU LIMITED

发明人：ITO HIDENOBU

分类号：G05F1/00

主分类号：G05F1/00

摘要：A control circuit for a DC-DC converter that prevents a deficiency from occurring due to sudden interruption in power supply. The control circuit activates and inactivates a main switching output transistor and a synchronous rectification output transistor to convert the input voltage to an output voltage. The output voltage is smoothed by a smoothing capacitor. When the input voltage decreases, the control circuit activates the synchronous rectification output transistor to readily discharge the smoothing capacitor via the synchronous rectification output transistor.

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