Sensing and feedback in a current mode control voltage regulator
US8629669B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 2010 |
| Grant date | Jan 14, 2014 |
| Priority date | — |
| Expiry date | Oct 28, 2031 |
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 comparator mechanism triggers a transition in a power switch when the error in the regulated output voltage is equal to a proportionally scaled value of current provided at an output filter. The 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. A comparator mechanism has a reference input coupled to a reference voltage, a feedback input coupled to sense a feedback voltage at the output filter, a current sensing input coupled to sense a current sensing voltage corresponding to a current provided to the output filter, and an output in communication with the power switch input. The comparator mechanism is configured to trigger responsive to a difference between the feedback voltage and the reference voltage equaling the current sensing voltage. The triggering causes a transition of the power swit…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.