3A Fault Tolerant Low Side Driver Circuit Design Using Design FMEA for Automotive Applications

Easwaran SN, Mollat M, Sreedharan D, Camdzic S, Kashvap SV, Weigel R (2019)

Publication Type: Conference contribution

Publication year: 2019

Publisher: Institute of Electrical and Electronics Engineers Inc.

Conference Proceedings Title: 17th IEEE International New Circuits and Systems Conference, NEWCAS 2019

Event location: Munich DE

ISBN: 9781728110318

DOI: 10.1109/NEWCAS44328.2019.8961225

Abstract

Electronic component is increasing in Automotive applications spanning from power train, connectivity, airbag, driver assistance, braking and more. Most of these components are Integrated Circuits that have to fulfill system safety requirements in sophisticated safety applications. A functional safety review and assessment are used to confirm whether integrated circuit component fulfills hardware safety and functional requirements derived from system safety goals. One such automotive safety system is the Airbag Control Unit with integrated Squib Drivers that deploys driver and passenger airbags when a valid car crash event is detected. Airbags are passive safety application, critical for driver and passenger safety that can be fatal if not deployed properly. Therefore, components used in airbag applications have to fulfill the highest system Automotive Safety Integrity Level (ASIL), ASIL-D. The safety critical part of Squib Driver Integrated Circuits is the High Side and Low Side powerFETs with its pre-drivers, control, monitoring, protection and diagnostics. This paper describes design Failure Mode Effect Analysis (FMEA) as one part of the systematic design methodology flow by using the low side current regulating driver as an example. This systematic approach resulted in a unique safety architecture that prevents inadvertent activation of the low side powerFET in the unpowered state of the driver. In the powered state, the current is regulated to 3A and is stable for inductances up to 3mH, a 30x higher inductive load than a traditional squib driver.

Authors with CRIS profile

Robert Weigel Lehrstuhl für Technische Elektronik

Involved external institutions

Texas Instruments Incorporated US United States (USA) (US) Texas Instruments Deutschland GmbH DE Germany (DE)

How to cite

APA:

Easwaran, S.N., Mollat, M., Sreedharan, D., Camdzic, S., Kashvap, S.V., & Weigel, R. (2019). 3A Fault Tolerant Low Side Driver Circuit Design Using Design FMEA for Automotive Applications. In 17th IEEE International New Circuits and Systems Conference, NEWCAS 2019. Munich, DE: Institute of Electrical and Electronics Engineers Inc..

MLA:

Easwaran, Sri Navaneeth, et al. "3A Fault Tolerant Low Side Driver Circuit Design Using Design FMEA for Automotive Applications." Proceedings of the 17th IEEE International New Circuits and Systems Conference, NEWCAS 2019, Munich Institute of Electrical and Electronics Engineers Inc., 2019.

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