Patent · US Active

Protection circuit for protecting a half-bridge circuit

US8441240B2 · kind B2 · utility

0Cited by

4References

15Claims

0Family size

Assignee

Infineon Technologies Austria AG · AT

Inventors

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

Key dates

Filing date	Feb 27, 2012
Grant date	May 14, 2013
Priority date	—
Expiry date	Feb 27, 2032

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.