FAB REQUALIFICATION
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.
The device has the capability to be used in a standard four-channel squib driver IC or in a crosscoupled state with the high- and low-side squib drivers located on separate squib driver ICs. Both the high- and low-side output drivers are protected against temporary shorts to battery or ground. The current limit threshold is set by an external resistor.
This product is undergoing a fab migration and device qualification is not complete. PC samples are available now. For more information contact your local sales office.
Features
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Four-channel high-side and low-side 2.0 A FET switches
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Externally adjustable FET current limiting
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Adjustable current limit range: 0.8 A to 2.0 A
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Individual channel current limit detection with timing duration measurement, communicated via SPI
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8-bit SPI for diagnostics and FET switch activation
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Diagnostics for high-side safing sensor status
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Resistance and voltage diagnostics for squibs
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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)