Over-current protection circuit with foldback capability
US8213147B2 · kind B2 · utility
2Cited by
2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2010 |
| Grant date | Jul 3, 2012 |
| Priority date | — |
| Expiry date | Dec 31, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H9/004
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An over-current protection circuit is disclosed that provides a current limit threshold using resistors in the path of a scaled mirror current of a load current. The protective circuit has a first state that passes a supply source to a device, but when the threshold is reached the circuit becomes a feedback circuit that allows only a set final current to be passed to the device. When the load current reaches the threshold, the mirror current reaches a corresponding threshold that triggers a comparator and circuitry that then limits and fold backs the load current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.