Invention Grant
- Patent Title: Switching power supply, control circuit for controlling switching power supply, control method of switching power supply and module substrate
- Patent Title (中): 开关电源，控制开关电源的控制电路，开关电源和模块基板的控制方法
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Application No.: US12772527Application Date: 2010-05-03
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Publication No.: US08427793B2Publication Date: 2013-04-23
- Inventor: Yu Yonezawa , Naoyuki Mishima
- Applicant: Yu Yonezawa , Naoyuki Mishima
- Applicant Address: JP Kawasaki
- Assignee: Fujitsu Limited
- Current Assignee: Fujitsu Limited
- Current Assignee Address: JP Kawasaki
- Agency: Staas & Halsey LLP
- Main IPC: H01H9/30
- IPC: H01H9/30 ; H01H9/56 ; H01H73/18
Abstract:
A switching power supply includes: a first switch provided between a positive terminal of a DC power supply and a positive terminal of a load; a second switch connected in parallel with the first switch; a first capacitor provided between the second switch and a node of the first switch on a DC power supply side; a first inductor provided between the first capacitor and the positive terminal of the DC power supply; and a control circuit that turns off the second switch after the first switch is turned off and when or before a voltage across the first capacitor becomes zero.
Public/Granted literature
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