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Automotive ASFETs for Airbag Applications

Enhanced SOA for improved linear mode performance

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. This is due to the safe operating area (SOA) being greater for trench technologies with wider cell pitch when operating in linear mode. The MOSFET must be able to handle a current proportional to the number of squibs in the system, whilst regulating their supply voltage for long enough to activate the airbags. 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.

ASFETs for Airbag Applications

Automotive ASFETs for Airbag are designed to meet the needs of linear mode operation

  • Qualified to AEC-Q101
  • Increased SOA for improved linear mode performance 
  • Reliable in airbag deployment conditions 
  • Modern trench alternative to older generations of silicon technology 
  • Space saving efficiency (53% for LFPAK56, 84% for LFPAK33) when comparing to traditional DPAK packages
  • All copper-clip benefits such as low thermal resistance, low package resistance and high current capability 
  
    

Airbag controller with Safing MOSFET

 

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Automotive ASFETs for Airbag Applications
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Products

Type number Description Status Quick access
BUK9M20-60EL Single N-channel 60 V, 13 mOhm logic level MOSFET in LFPAK33 using Enhanced SOA technology Production
BUK9M31-60EL Single N-channel 60 V, 21 mOhm logic level MOSFET in LFPAK33 using Enhanced SOA technology Production
BUK9M67-60EL Single N-channel 60 V, 44 mOhm logic level MOSFET in LFPAK33 using Enhanced SOA technology Production
BUK9Y13-60EL Single N-channel 60 V, 7.9 mOhm logic level MOSFET in LFPAK56 using Enhanced SOA technology Production
BUK9Y22-60EL Single N-channel 60 V, 15 mOhm logic level MOSFET in LFPAK56 using Enhanced SOA technology Production
BUK9Y7R0-60EL Single N-channel 60 V, 4.5 mOhm logic level MOSFET in LFPAK56 using Enhanced SOA technology Production
BUK9Y8R8-60EL Single N-channel 60 V, 5.6 mOhm logic level MOSFET in LFPAK56 using Enhanced SOA technology Production
Visit our documentation center for all documentation

Application note (9)

File name Title Type Date
AN50006 Power MOSFETs in linear mode Application note 2022-04-01
AN11261 RC Thermal Models Application note 2021-03-18
AN90003 LFPAK MOSFET thermal design guide Application note 2021-01-22
AN50001 Reverse battery protection in automotive applications Application note 2021-01-12
AN90016 Maximum continuous currents in NEXPERIA LFPAK power MOSFETs Application note 2020-09-03
AN90019 LFPAK MOSFET thermal resistance - simulation, test and optimization of PCB layout Application note 2020-07-20
AN11158 Understanding power MOSFET data sheet parameters Application note 2020-07-06
AN11243 Failure signature of Electrical Overstress on Power MOSFETs Application note 2017-12-21
AN90001 Designing in MOSFETs for safe and reliable gate-drive operation Application note 2017-05-05

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