Invention Grant
US08212493B2 Low energy transfer mode for auxiliary power supply operation in a cascaded switching power converter
有权
用于级联开关电源转换器中辅助电源运行的低能量传输模式
- Patent Title: Low energy transfer mode for auxiliary power supply operation in a cascaded switching power converter
- Patent Title (中): 用于级联开关电源转换器中辅助电源运行的低能量传输模式
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Application No.: US12495720Application Date: 2009-06-30
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Publication No.: US08212493B2Publication Date: 2012-07-03
- Inventor: John L. Melanson , Mauro L. Gaetano , Eric King , Robert Grisamore , Zhaohui He
- Applicant: John L. Melanson , Mauro L. Gaetano , Eric King , Robert Grisamore , Zhaohui He
- Applicant Address: US TX Austin
- Assignee: Cirrus Logic, Inc.
- Current Assignee: Cirrus Logic, Inc.
- Current Assignee Address: US TX Austin
- Agency: Mitch Harris, Atty at Law, LLC
- Agent Andrew M. Harris
- Main IPC: H05B41/36
- IPC: H05B41/36 ; H02M3/335
Abstract:
A cascaded power converter having an auxiliary power supply operated from the second switching power stage provides efficient operation by activating the auxiliary power supply early in the startup process. A low energy transfer operating mode is initiated in the second switching power stage to charge the auxiliary power supply output without generating significant disruption at the load. After the first switching power stage is started and the intermediate node voltage has increased to a level sufficient to operate the second switching power stage, the final switching power stage enters a normal operating mode. The low energy transfer operating mode has a substantially reduced switching rate and pulse width from that of the normal operating mode.
Public/Granted literature
- US20100327765A1 LOW ENERGY TRANSFER MODE FOR AUXILIARY POWER SUPPLY OPERATION IN A CASCADED SWITCHING POWER CONVERTER Public/Granted day:2010-12-30
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