The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 08, 2005
Filed:
May. 27, 2003
Rainald Sander, München, DE;
Frank Kahlmann, Neubiberg, DE;
Veli Kartal, München, DE;
Detlef Kalz, Grafing, DE;
Helmut Hertrich, Vaterstetten, DE;
Rainald Sander, München, DE;
Frank Kahlmann, Neubiberg, DE;
Veli Kartal, München, DE;
Detlef Kalz, Grafing, DE;
Helmut Hertrich, Vaterstetten, DE;
Infineon Technologies AG, Munich, DE;
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.