Peak current controlled converter with additional current threshold control level to limit current tailout during overload conditions
US4524412A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 6, 1983 |
| Grant date | Jun 18, 1985 |
| Priority date | — |
| Expiry date | Jun 6, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/3387
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power converter circuit, which is voltage-regulated and current-limited by a peak current control circuit, significantly reduces the current tailout effect by decreasing the frequency of operation of the converter during low voltage output current-limited operation by increasing the nonconduction interval of the power switch while maintaining a fixed conduction interval. The peak current control circuit periodically initiates current conduction in the power switch in response to a clock pulse, and terminates conduction when a peak current level is attained. The peak current control includes circuitry to compare decaying current in the filter circuit during nonconducting intervals with a preset current tailout threshold level. The periodic triggering of the power switch into conduction is inhibited until current has decayed to this current tailout threshold level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.