Cancellation of slope compensation effect on current limit
US6611131B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 2002 |
| Grant date | Aug 26, 2003 |
| Priority date | — |
| Expiry date | Sep 30, 2022 |
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.