Cancellation of slope compensation effect on current limit
US6498466B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 23, 2000 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | May 23, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33507
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A current-mode switching regulator that maintains a substantially constant maximum current limit over a virtually full range of duty cycles is provided. The regulator has a control circuit that includes a buffer circuit, an adjustable voltage clamp circuit, and a slope compensation circuit. The buffer circuit isolates a control signal from capacitive loading associated with control circuit. The threshold level of the adjustable voltage clamp circuit varies with respect to the amount of slope compensation provided to the voltage regulator. This allows a control voltage to increase as slope compensation increases so that a substantially constant maximum current limit is maintained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.