Invention Grant
- Patent Title: Switching power supply apparatus
- Patent Title (中): 开关电源装置
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Application No.: US12573279Application Date: 2009-10-05
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Publication No.: US08149598B2Publication Date: 2012-04-03
- Inventor: Kohei Mimura
- Applicant: Kohei Mimura
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: JP2008-260542 20081007
- Main IPC: H02M3/335
- IPC: H02M3/335

Abstract:
A switching power supply apparatus according to the present invention includes a switching device and a control circuit, and the control circuit includes: a control terminal through which an auxiliary power voltage is supplied; an error amplifier which generates a difference voltage depending on a difference between a control terminal voltage and a first reference voltage; a device current detection circuit which generates a device current detection signal indicating an amount of a current flowing in the switching device; a drive circuit which generates a drive pulse signal having a duty cycle based on a difference between the difference voltage and the device current detection signal and drives the switching device by using the generated drive pulse signal; and a dummy load circuit through which a dummy load current flows from the control terminal when the difference voltage becomes equal to or higher than a second reference voltage.
Public/Granted literature
- US20100085776A1 SWITCHING POWER SUPPLY APPARATUS Public/Granted day:2010-04-08
Information query
IPC分类: