Invention Grant
- Patent Title: Switching regulator with boosted auxiliary winding supply
- Patent Title (中): 带升压辅助绕组电源的开关稳压器
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Application No.: US12242298Application Date: 2008-09-30
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Publication No.: US08008898B2Publication Date: 2011-08-30
- Inventor: John L. Melanson , Mauro L. Gaetano , Karl Thompson
- Applicant: John L. Melanson , Mauro L. Gaetano , Karl Thompson
- Applicant Address: US TX Austin
- Assignee: Cirrus Logic, Inc.
- Current Assignee: Cirrus Logic, Inc.
- Current Assignee Address: US TX Austin
- Agent Mitch Harris, Atty at Law, LLC; Andrew M. Harris
- Main IPC: G05F1/613
- IPC: G05F1/613
Abstract:
A boosted auxiliary winding power supply for a switched-power converter circuit provides operating voltage for control and other circuits early in the start-up phase of converter operation. A boost circuit has an input coupled to the auxiliary winding to boost the voltage available from the auxiliary winding at least during start-up of the switched-power converter. The boost thereby provides a voltage that is greater than the voltage across the auxiliary winding during start-up of the switched-power converter. The boost circuit may be actively switched at a rate higher than a switching rate of the switched-power converter, to increase a rate of rise of the operating voltage. Polarity information, which may be provided from the switched-power converter control circuit, can be used to actively rectify the output of the auxiliary winding.
Public/Granted literature
- US20090190379A1 SWITCHING REGULATOR WITH BOOSTED AUXILIARY WINDING SUPPLY Public/Granted day:2009-07-30
Information query
IPC分类:
