Product overview
Description
L9658 is intended to deploy up to 8 squibs and to interface up to 4 satellites. 2 satellite interfaces can be used to interface Hall sensors.
Squib drivers are sized to deploy 1.2 A minimum for 2 ms minimum during load dump and 1.75 A minimum for 1ms minimum during load dump.
Diagnostic of squib driver and squib resistance measurement is controlled by micro controller.
Satellite interfaces support Manchester decoder with variable bit rate.
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All features
- 8 deployment drivers sized to deliver 1.2 A (min) for 2 ms (min) and 1.75 A (min) for 1 ms (min)
- Independently controlled high-side and low-side MOS for diagnosis
- Analog output available for resistance
- Squib short to ground, short to battery and MOS diagnostic available on SPI register
- Capability to deploy the squib with 1.2 A (min) or 1.75 A under 35 V load-dump condition and the low side MOS is shorted to ground
- Capability to deploy the squib with 1.2 A (min) at 6.9 V VRES and 1.75 A at 12 V VRES
- Interface with 4 satellite sensors
- Programmable independent current trip points for each satellite channel
- Support Manchester protocol for satellite sensors
- Supports for variable bit rate detection
- Independent current limit and fault timer shutdown protection for each satellite output
- Short to ground and short to battery detection and reporting for each satellite channel
- 5.5 MHz SPI interface
- Satellite message error detection
- Hall effect sensor support on satellite channels 3 and 4.
- Low voltage internal reset
- 2 kV ESD capability on all pins
- Package: 64 leads LQFP
- Technology: ST proprietary BCD5s (0.57 μm)
