Sensing and feedback with enhanced stability in a current mode control voltage regulator
US8779744B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 14, 2010 |
| Grant date | Jul 15, 2014 |
| Priority date | — |
| Expiry date | Jan 14, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The disclosed embodiments of voltage regulators incorporate a current mode control architecture. In one embodiment, a voltage regulator includes a power switch having an input and an output. The power switch is configured to provide a first voltage during a first conduction period and a second voltage during a second conduction period. An output filter is coupled between the power switch output and an output terminal to be coupled to a load. An adjustment device is coupled to sense a current sensing voltage corresponding to a current provided to the output filter. The adjustment device is configured to convert the current sensing voltage to an adjusted current sensing voltage, including replacing a current sensing resistance associated with the current sensing voltage with a reference resistance. Control circuitry includes a current sensing input coupled to the adjustment device to sense the adjusted current sensing voltage, and an output in communication with the power switch input. The control circuitry is configured to cause a transition of the power switch from the second conduction period to the first conduction period responsive to the adjusted current sensing voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.