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Patent Searching and Data


Title:
HYSTERESIS CONTROL FOR STEP-DOWN DC/DC CONVERTER
Document Type and Number:
WIPO Patent Application WO/2013/063021
Kind Code:
A3
Abstract:
A hysteretic power converter (100) constituted of: a switched mode power supply (40); a hysteretic comparator (20), a first input (FB) of the comparator arranged to receive a feedback signal providing a representation of the output voltage of the switched mode power supply and a second input (VREF) of the comparator arranged to receive a reference voltage; a ramp capacitor (180) coupled to one of the first and second input of the comparator; a current source (140), a terminal of the current source coupled to the ramp capacitor and arranged to drive current to the ramp capacitor; and a switchable current source (150), a terminal of the switchable current source coupled to the ramp capacitor, the switchable current source (150) arranged to drive current to the ramp capacitor in a direction opposite the current driven by the current source (140), wherein the switchable current source is alternately enabled and disabled responsive to the output of the hysteretic comparator (20).

Inventors:
SMITH KEVIN MARK JR (US)
CENGELCI EKREM (US)
Application Number:
US2012/061559
Publication Date:
August 15, 2013
Filing Date:
October 24, 2012
Export Citation:
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Assignee:
MICROSEMI CORP (US)
International Classes:
H02M3/158; H03K3/3565
Foreign References:
US20080042633A12008-02-21
US20100123446A12010-05-20
Attorney, Agent or Firm:
KAHN, Simon (Attn: Janet Drakes3870 North FIrst Stree, San Jose CA, US)
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