Patent · US Active

Power switch circuit for driving an airbag squib module

US7932622B2 · kind B2 · utility

6Cited by

7References

42Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Giorgio Chiozzi · Padova, IT
Alberto Flore · Samugheo, IT
Joachim Glaeser · Munich, DE
Alberto Gola · Pavia, IT
Michael Lenz · Zorneding, DE
Nicola Macri · Straubing, DE
Salvatore Piccolella · Padova, IT

Key dates

Filing date	Sep 29, 2006
Grant date	Apr 26, 2011
Priority date	—
Expiry date	Jul 13, 2028

Classification

Technology area (CPC H)Electricity
CPC primaryH03K17/04106
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A power switch circuit for driving an airbag squib module has a power transistor, a pre-charge capacitance for storing a charge, a charging circuit and a controllable energy-coupling element. The power transistor has a first electrode, a second electrode and a control electrode. A path between the first electrode and the second electrode is connected in series with the airbag squib module between a supply potential and a reference potential. The charging circuit charges the pre-charge capacitance and the charging circuit is therefore coupled with the pre-charged capacitance. The controllable energy coupling element is connected between a first electrode of the pre-charge capacitance and the control electrode of the power transistor. The power switch exhibits a high degree of stability, allows a fast switching of the power transistor and further has an advantageous transient response.

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