Feed forward control of switching regulator
US8106639B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2008 |
| Grant date | Jan 31, 2012 |
| Priority date | — |
| Expiry date | Oct 9, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0022
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a switching regulator with an error amplifier circuit and a feed-forward circuit. The error amplifier circuit provides an error signal by amplifying the difference between a feedback signal and a reference signal. The feed-forward circuit level-shifts the output of the error amplifier based on the feed-forward input signal and a scaling factor. The resulting adjusted error signal includes both feed-back and feed-forward signal components. A PWM comparator is employed to compare the adjusted error signal to a ramp signal. Switched-mode regulation is performed based on the PWM comparator output. In addition, buck-boost mode transition smoothing circuitry may also be employed to smooth the buck-mode/boost-mode transition in a buck-boost switching regulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.