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L9654：Quad squib driver and dual sensor interface for safety application

L9654 is intended to deploy up to 4 squibs and to interface up to 2 satellites.

Squib drivers are sized to deploy 1.2 A (min.) for 2 ms (min.) during load dump and 1.75 A (min.) for 1 ms (min.) during load dump.

Diagnostic of squib driver and squib resistance measurement is controlled by micro controllers.

Satellite interfaces support Manchester decoder with variable bit rates.

Key Features

• 4 deployment drivers sized to deliver 1.2 A (min) for 2 ms (min) and 1.75 A (min) for 1ms (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 2 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
• Low voltage internal reset
• 2 kV ESD capability on all pins
• Package: 48 lead LQFP
• Technology: ST Proprietary BCD5s (0.57 ?m)

Product Specifications

Application Notes

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Quality & Reliability