发明授权
- 专利标题： Power supply device, control circuit and method for controlling power supply device
- 专利标题（中）： 电源装置，控制电路及控制电源装置的方法
-
申请号： US12762668申请日： 2010-04-19
-
公开(公告)号： US08344711B2公开(公告)日： 2013-01-01
- 发明人: Kazuyoshi Futamura
- 申请人： Kazuyoshi Futamura
- 申请人地址： JP Yokohama
- 专利权人： Fujitsu Semiconductor Limited
- 当前专利权人： Fujitsu Semiconductor Limited
- 当前专利权人地址： JP Yokohama
- 代理机构： Arnet Fox LLP
- 优先权： JP2009-113915 20090508
- 主分类号： G05F1/00
- IPC分类号： G05F1/00
摘要：
A power supply device including a converter having a switch circuit to which an input voltage is supplied and a coil coupled between the switch circuit and an output end from which an output voltage is output; and a control circuit comparing between a feedback voltage and a reference voltage, and on/off controls the switch circuit according to a comparison result; wherein, the control circuit includes a current gradient detection circuit performs detection of a gradient of a coil current flows thorough the coil during an off period of the switch circuit and generates a slope voltage according to a result of the detection; and an adder circuit performs one of generating the feedback voltage by adding the slope voltage to a voltage according to the output voltage and generating the reference voltage by adding the slope voltage to a standard voltage that is set according to the output voltage.