Four Channel Squib Driver IC

The Four Channel Squib Driver IC is a complete squib diagnostic and deployment interface for use in automotive air bag modules. Extensive diagnostics and system control features are incorporated to provide fail-safe operation. The device contains a serial peripheral interface (SPI) compatible 8-bit interface to allow microprocessor control.

FEATUREs
• Four channel high side and low side 2.0 A FET switches
• Externally adjustable FET current limiting
• Adjustable current limit range: 0.8 to 2.0 A
• Individual channel current limit detection with timing duration measurement, communicated via the SPI
• 8-Bit SPI for diagnostics and FET switch activation
• Diagnostics for high side safing sensor status
• Resistance and voltage diagnostics for squibs
• Squib driver IC capability to be used for cross-coupled driver firing application (allows high and low side FET switches to be located on separate squib driver ICs)