- STMicroelectronics [CV2.1][CV2.2]passive safety portfolio combines highly integrated airbag system ICs with scalable extension drivers, serving carmakers and Tier-1 airbag control unit (ACU[CV3.1]) designers across cost-optimized entry vehicles through high-end centralized safety domain controllers. The portfolio supports system-level ISO 26262 compliance up to ASIL D.
- Boost and buck converters for ACU power management
- Configurable squib drivers with programmable deployment profiles and per-channel diagnostics
- PSI5 v2.3 satellite sensor interfaces for front, side, and curtain airbags
- Hall-effect and resistive sensor interfaces for seat occupancy, buckle, and position sensing
- Diagnostic ADC array (15 channels at 10, 13, and 14-bit resolution) covering supply rails, deployment paths, energy reserve [CV4.1]capacitor (ER) value and ESR, and sensor channels.
ST airbag ICs integrate:
This scalable approach reduces Bill of Materials (BoM) line items and simplifies PCB layout for airbag control unit (ACU) architectures across multiple vehicle platforms.
Application
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Product types
- The ST passive safety portfolio is structured around four product categories that combine to match each ACU architecture:
- Airbag system ICs: single-package integration of power supply, squib drivers, sensor interfaces, and diagnostics, anchoring the central ACU function
- Airbag extension ICs additional deployment channels with per-channel diagnostics for ACU designs that exceed a single system IC's squib channel count
- Satellite sensor interfaces: Optional PSI5 v2.3 interfaces for connecting remote crash sensors and satellite accelerometers to the ACU
Benefits
- Scalable airbag architectures: a single IC family covers entry-level through high-end ACU platforms, reducing ECU variants across customer programs.
- Lower BoM and simpler ACU design: integrated power supply, squib drivers, sensor interfaces, and diagnostics reduce external component count and PCB complexity.
- System-level ASIL D support: on-chip diagnostics across supply rails, deployment paths, energy reserve [CV7.1]capacitor (ER) health, and sensor channels support ISO 26262 compliance up to ASIL D.
- Stable power through cold-crank events: high-efficiency boost/buck converters with on-chip voltage references maintain ACU operation through cold-crank battery voltage dips.