Method and apparatus for control of a power transistor in a digital voltage regulator
US6198261A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1998 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | Oct 30, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/157
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A digital control system for a voltage regulator calculates an estimated current representing a current passing through each inductor associated with a switching circuit. A desired total output current is calculated which will maintain an output voltage at the output terminal at a substantially constant level. Upper current limit and a lower current limit are calculated and the switching circuit to is caused couple an input terminal to an output terminal when the estimated current falls below the lower current limit, and caused to couple the output terminal to ground when the estimated current exceeds the upper current limit. Also, the estimated current may be compared to an individual current to trigger the switching circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.