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Patent Searching and Data


Title:
ASYMMETRICAL COUPLED INDUCTORS AND ASSOCIATED METHODS
Document Type and Number:
WIPO Patent Application WO/2011/088048
Kind Code:
A3
Abstract:
An asymmetrical coupled inductor includes a first and a second winding and a core. The core is formed of a magnetic material and magnetically couples together the windings. The core is configured such that a leakage inductance value of the first winding is greater than a leakage inductance value of the second winding. The coupled inductor is included, for example, in a multi-phase DC-to-DC converter. A DC-to-DC converter including a symmetrical coupled inductor includes at least one additional inductor electrically coupled in series with one or more of the coupled inductor's windings. A controller for a DC-to-DC converter including a first phase having an effective inductance value greater than an effective inductance value of a second phase is configured to shut down the second phase while the first phase remains operational during a light load operating condition.

Inventors:
IKRIANNIKOV ALEXANDR (US)
DJEKIC OGNJEN (US)
Application Number:
PCT/US2011/020842
Publication Date:
February 02, 2012
Filing Date:
January 11, 2011
Export Citation:
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Assignee:
VOLTERRA SEMICONDUCTOR CORP (US)
IKRIANNIKOV ALEXANDR (US)
DJEKIC OGNJEN (US)
International Classes:
H01F3/10; H01F3/14
Domestic Patent References:
WO2002017469A12002-02-28
Foreign References:
US20090231081A12009-09-17
EP0755060A11997-01-22
US20070076453A12007-04-05
US20090146622A12009-06-11
Attorney, Agent or Firm:
DIZEREGA, Philip (4845 Pearl East CircleSuite 20, Boulder CO, US)
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