(19)
(11) EP 2 727 229 A1

(12)

(43) Date of publication:
07.05.2014 Bulletin 2014/19

(21) Application number: 12737415.5

(22) Date of filing: 29.06.2012
(51) International Patent Classification (IPC): 
H02M 1/36(2007.01)
H05B 33/08(2006.01)
(86) International application number:
PCT/US2012/045108
(87) International publication number:
WO 2013/003810 (03.01.2013 Gazette 2013/01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30) Priority: 30.06.2011 US 201161503357 P
29.07.2011 US 201113194531
24.08.2011 US 201113217174
02.11.2011 US 201113287257
04.11.2011 US 201113290032

(71) Applicant: Cirrus Logic, Inc.
Austin, TX 78746 (US)

(72) Inventors:
  • HE, Zhaohui
    Austin, Texas 78746 (US)
  • SINGH, Rahul
    Austin, Texas 78704 (US)
  • KING, Eric J.
    Dripping Springs, Texas 78620 (US)
  • MELANSON, John L.
    Austin, Texas 78703 (US)
  • DRAPER, William A.
    Austin, Texas 78703 (US)

(74) Representative: Freeman, Jacqueline Carol 
WP Thompson 55 Drury Lane
London WC2B 5SQ
London WC2B 5SQ (GB)

   


(54) INPUT VOLTAGE SENSING FOR A SWITCHING POWER CONVERTER AND A TRIAC-BASED DIMMER