Patent · US Expired

Power switching device

US6853232B2 · kind B2 · utility

9Cited by

7References

6Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Rainald Sander · Oberhaching, DE
Frank Kahlmann · Neubiberg, DE
Veli Kartal · Munich, DE
Detlef Kalz · Grafing, DE
Helmut Hertrich · Dingolfing, DE

Key dates

Filing date	May 27, 2003
Grant date	Feb 8, 2005
Priority date	—
Expiry date	May 27, 2023

Classification

Technology area (CPC H)Electricity
CPC primaryH03K17/166
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A power switching device has a power switching transistor connected in series in a load circuit with an inductive load portion and a commutation circuit. The commutation circuit is connected in parallel with the gate-drain or base-collector path of the power transistor and has a first Zener diode, which determines the commutation clamping voltage for switching on the power switching transistor during commutation, and an oppositely biased normal diode that is connected in series with the first Zener diode. The commutation circuit further has control elements in order to reduce, during a short time, the commutation clamping voltage at the beginning of each commutation cycle or after an adjustable delay from the beginning of each commutation cycle.

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