Overcurrent protection for switching mode power converter
US4928200A · kind A · utility
50Cited by
23References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1987 |
| Grant date | May 22, 1990 |
| Priority date | — |
| Expiry date | Oct 6, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/1227
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit for decreasing the minimum duty ratio of a switching element in a power converter in response to a signal indicating that sensed current exceeds a second threshold. The circuit turns off the switching element when the sensed current exceeds a first threshold. The minimum duty ratio may be decreased, for example by increasing the period of the switching element or by increasing the "off" time of the switching element. The circuit protects against current runaway.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.