发明申请
- 专利标题: Switching power supply
- 专利标题(中): 开关电源
-
申请号: US12012059申请日: 2008-01-30
-
公开(公告)号: US20080290846A1公开(公告)日: 2008-11-27
- 发明人: Akihiko Kanouda , Kenichi Yokota
- 申请人: Akihiko Kanouda , Kenichi Yokota
- 申请人地址: JP Tokyo
- 专利权人: Renesas Technology Corp.
- 当前专利权人: Renesas Technology Corp.
- 当前专利权人地址: JP Tokyo
- 优先权: JP2007-044845 20070226
- 主分类号: H02M1/00
- IPC分类号: H02M1/00
摘要:
A switching power supply capable of correcting a power factor without using a shunt resistor is provided. The switching power supply includes a rectifier for rectifying an AC power supply, boosting means including a power MOSFET for boosting an output of the rectifier, a smoothing capacitor for smoothing an output of the boosting means, voltage-dividing resistors for detecting a voltage between main terminals of the power MOSFET, a switch for selecting only the voltage by which the power MOSFET is in on-state from voltages detected by the voltage-dividing resistors, an amplifier for amplifying the voltage selected by the switch and outputting the same as a current corresponding value of a current flowing in the power MOSFET, voltage-dividing resistors for detecting the output voltage, and driving means which form a pulse signal based on the current corresponding value and the output voltage for driving the power MOSFET by the pulse signal.
公开/授权文献
- US07800354B2 Switching power supply 公开/授权日:2010-09-21