Overcurrent protection device for semiconductor element
US7505240B2 · kind B2 · utility
2Cited by
11References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2006 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | Nov 21, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/145
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An overcurrent protecting device for protecting a semiconductor element from an overcurrent includes: the semiconductor element; a shunt resistor for detecting the overcurrent when the electric current in the semiconductor element exceeds a threshold value; a reference resistor for setting the threshold value; a constant electric current circuit for supplying a constant electric current to the reference resistor; and a comparator for comparing a terminal voltage of the shunt resistor and a terminal voltage of the reference resistor. The shunt resistor is made of a same kind of resistor as the reference resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.