Power supply apparatus having a reference voltage register and method of controlling
US6911808B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1998 |
| Grant date | Jun 28, 2005 |
| Priority date | — |
| Expiry date | Aug 2, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A reference voltage register stores a reference value Vref indicating the output voltage Vout of a power supply circuit. A digital filter amplifies the difference between the output voltage Vout from the power supply circuit and the reference value Vref stored in the reference voltage register. A pulse width computation unit computes the duty such that the output voltage Vout matches the reference value Vref, and generates the on-time of a pulse signal corresponding to the duty. A reference value operation unit updates the reference voltage register depending on the output current from the power supply circuit or the temperature around the power supply circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.