Switching power supply control with phase shift
US7443150B2 · kind B2 · utility
5Cited by
8References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 3, 2005 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Oct 19, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/158
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control system for a switching power supply shifts the phase of a PWM signal in response to a change in operating conditions. The phase may be shifted by resetting an oscillator that controls the PWM signal. Phase shift logic may include a sample-hold circuit that holds the value of an error signal when the PWM signal switches state. The held error signal may be compared to the real-time error signal, preferably with a user configurable offset. The output of the phase shift logic may be used to reset the oscillator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.