Short circuit protection circuit for a low-side driver circuit
US5696658A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 1995 |
| Grant date | Dec 9, 1997 |
| Priority date | — |
| Expiry date | Oct 5, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/04206
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A short circuit protection circuit which has a first short circuit protection circuit in parallel with a second short circuit protection circuit is disclosed. The first short circuit protection circuit includes a sense resistor and a comparator for detecting the short circuit, and a transistor and current source for turning off the low side driver when the short circuit is detected. The second short circuit protection circuit includes a current mirror, zener diode, transistor, and current source connected in series. The second short circuit protection circuit is in parallel with the first short circuit protection circuit. The second short circuit protection circuit accelerates the turn-off of the low-side driver with out affecting the stability of the circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.