Application Note (2)
Data Sheet (1)
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MC33797, Four Channel Squib Driver IC - Data Sheet[MC33797]Featured
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Four Channel Squib Driver IC
- This page contains information on a product that is not recommended for new designs.
The NXP® MC33797 is a four-channel squib driver integrated circuit with 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
- Contains a 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 cross coupled state with the high- and low-side squib drivers located on separate squib driver ICs
- Both high- and low-side output drivers are protected against temporary shorts to battery or ground and the current limit threshold is set by an external resistor
Product Details
Features
- Four-channel high-side and low-side 2.0 A FET switches
- Externally adjustable FET current limiting
- Adjustable current limit range: 0.8 A to 2.0 A
- Individual channel current limit detection with timing duration measurement, communicated via 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)
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