Adaptive digital voltage regulator with same-cycle feedback
US7109695B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 17, 2005 |
| Grant date | Sep 19, 2006 |
| Priority date | — |
| Expiry date | Nov 17, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/157
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A digitally-controlled, DC/DC converter includes a switched-mode power stage for the purpose of converting an input voltage (Vin) into an output voltage (Vout); the power stage including a controllable switching device, which is turned ON and OFF by a control device with temporal resolution Δt. The converter further includes a duty cycle control mechanism for controlling the duty cycle of the controllable switching device; the duty cycle control mechanism including a mechanism for estimating the output voltage error, and a selector mechanism for determining the turn OFF and turn ON times of the controllable switching device by choosing, cycle by cycle, an ON time/OFF time pair from a set of quantized ON time/OFF time pairs, choosing in such a manner that the amplitude of the output voltage error is continually minimized. At each switching cycle, the current output voltage error estimate is generated, and the ON time/OFF time pair chosen, after the switch has turned ON, but before the turn OFF time implicit in the chosen pair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.