Slope compensation module
US9312844B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2013 |
| Grant date | Apr 12, 2016 |
| Priority date | — |
| Expiry date | Feb 17, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K6/04
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.