Nexperia BUK9xx

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.  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. 

Key features

• Headline product the BUK9M20-60EL single N-ch 60 V, 13 mOhm logic level MOSFET in LFPAK33
• Exceptional transient linear mode performance, key in airbag applications
• LFPAK33 uses 84% less board space versus DPAK, while still maintaining robustness.
• Enhanced safe operating area technology

Additional features

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

Applications

• 12V Automotive systems
• Airbag squib voltage regulator MOSFET