Patent · US Active

Protection circuit for protecting a half-bridge circuit

US8125202B2 · kind B2 · utility

2Cited by

4References

7Claims

0Family size

Assignee

Infineon Technologies Austria AG · AT

Inventors

Martin Feldtkeller · Munich, DE
Dieter Zipprick · Hille, DE

Key dates

Filing date	Aug 21, 2008
Grant date	Feb 28, 2012
Priority date	—
Expiry date	Aug 30, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH02H7/1225
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The present invention relates to a protection circuit for protecting a half-bridge circuit. The protection circuit detects an incorrect response of the half-bridge by monitoring the current of a first switch at a series resistor of a second switch.The protection circuit has a detector for detecting the voltage across the resistor and an evaluation circuit which is designed in such a manner that it evaluates an output signal from the detector after the first switch has been switched on and provides a fault signal at an output when the voltage across the resistor is greater than the threshold voltage.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.