Title:
SLOPE COMPENSATION MODULE
Document Type and Number:
WIPO Patent Application WO/2014/078625
Kind Code:
A3
Abstract:
A slope compensation module provides slope compensation of a switched-mode power supply using current mode control. The slope control unit comprises a capacitor coupled between an input and an output of the slope control unit, a switch for discharging the capacitor and a constant current source for charging the capacitor. Slope compensation parameters may be changed during operation with a programmable constant current source. The slope compensation module may also function as an analog sawtooth waveform frequency generator, and as an analog pulse width modulation (PWM) generator. Charging the capacitor generates a linearly decreasing (negative slope) ramp voltage for modulating a feedback error voltage into a slope compensated feedback error voltage. Capacitor charging may be controlled from a pulse width modulation signal. Opening of the switch may be programmably delayed, and a minimum closed time thereof may also be programmed during operation of the slope compensation module.
Inventors:
DARMAWASKITA HARTONO (US)
STEEDMAN SEAN STACY (US)
GROZA CRISTIAN NICOLAE (RO)
MANCIOIU MARILENA (RO)
CHARAIS JOHN ROBERT (US)
LUNDSTRUM ZEKE (US)
STEEDMAN SEAN STACY (US)
GROZA CRISTIAN NICOLAE (RO)
MANCIOIU MARILENA (RO)
CHARAIS JOHN ROBERT (US)
LUNDSTRUM ZEKE (US)
Application Number:
PCT/US2013/070244
Publication Date:
July 10, 2014
Filing Date:
November 15, 2013
Export Citation:
Assignee:
MICROCHIP TECH INC (US)
International Classes:
H03K4/502; H02M3/156; H03K7/08
Foreign References:
| US20080150508A1 | 2008-06-26 | |||
| US6188261B1 | 2001-02-13 | |||
| GB2045566A | 1980-10-29 |
Attorney, Agent or Firm:
SLAYDEN, Bruce, W., II (401 Congress Ave. Suite 320, Austin TX, US)
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