Automotive ASFETs for airbag applications
When choosing a MOSFET to regulate the supply voltage to the squibs in an airbag system, the choice has traditionally been limited to older generations of silicon technology, such as the legacy wire-bonded DPAK package. Nexperia have designed a range of Application Specific MOSFETS (ASFETs) to address the specialised needs of airbag applications, focused on enhanced SOA performance for improved linear mode.
This aim of this interactive application note is to help the reader gain an insight into how to protect 12 V automotive systems from being exposed to a reversed biased battery condition e.g. during maintenance where the battery leads may be reconnected in the opposite polarity.