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Separation of Deployment Integrated Circuits for Improved Airbag Robustness

IP.com Disclosure Number: IPCOM000004778D
Publication Date: 2001-May-17

Publishing Venue

The IP.com Prior Art Database

Abstract

In traditional airbag system electronic control units, a single deployment ASIC (Application Specific Integrated Circuit) includes two transistors that control the deployment of an airbag or pretensioner. The high side transistor allows voltage to be applied to the feed circuit to the airbag. The low side transistor allows ground to be applied to the return circuit from the airbag. The traditional design has a disadvantage. It is theoretically possible to have a single failure of the integrated circuit which could result in the inadvertent deployment of the airbag.