Patent · US Active

Method and circuit for detecting a loss of a bondwire in a power switch

US10845428B2 · kind B2 · utility

1Cited by

2References

24Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Andreas Meiser · Unterhaching, DE
Benno Koeppl · Markt Indersdorf, DE
Marcus Nuebling · Olching, DE
Markus Zannoth · Munich, DE
Alexander Mayer · Velden am Wörther See, AT

Key dates

Filing date	Jun 1, 2018
Grant date	Nov 24, 2020
Priority date	—
Expiry date	Nov 30, 2038

Classification

Technology area (CPC G)Physics
CPC primaryG01R31/54
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A driver circuit associated with a power electronic system is disclosed. The driver circuit comprises a gate driver circuit configured to drive a switching circuit comprising a plurality of switches in parallel, each switch comprising a respective source bondwire. The driver circuit further comprises a bondwire fault detection circuit comprising a gate charge estimation circuit configured to measure a parameter of the switching circuit comprising a gate charge of the switching circuit or a parameter indicative of the gate charge associated with the switching circuit. The bondwire fault detection circuit further comprises a detection circuit configured to detect a fault associated with at least one source bondwire of the switching circuit, based on the measured parameter of the switching circuit.

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