PWM generation for DC/DC converters with frequency switching
US9825527B2 · kind B2 · utility
1Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2014 |
| Grant date | Nov 21, 2017 |
| Priority date | — |
| Expiry date | Dec 18, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/158
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for generating a pulse width modulation (PWM) control signal generates a sawtooth ramp signal at a first frequency under standard operating conditions using a ramp generator, and generates a sawtooth ramp at a second frequency under alternative operating conditions. The sawtooth ramp is combined with an error threshold by a PWM controller to generate a square wave PWM control signal. The error threshold is adjusted simultaneous with adjusting the frequency of the sawtooth ramp, thereby preventing either a voltage overshoot and a voltage undershoot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.