Input protection circuit
US8259428B2 · kind B2 · utility
52Cited by
9References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2009 |
| Grant date | Sep 4, 2012 |
| Priority date | — |
| Expiry date | Mar 28, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H9/042
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A voltage clamp protection circuit to protect against overvoltage conditions where there is insufficient current to blow a fuse. The voltage clamp protection circuit includes a voltage clamp and a thermal cutoff. The voltage clamp clamps any overvoltage to a clamping voltage. If an overvoltage condition persists for too long the voltage clamp dissipates a sufficient amount of heat to activate the thermal cutoff creating an open circuit that protects the rest of the circuit. The voltage clamp protection circuit may be used in combination with a variety of other protection circuits to provide increased protection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.