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L9659 - Octal squib driver ASIC

Description

The L9659 is intended to deploy up to 8 squibs.

Squib drivers are sized to deploy 1.2 A minimum for 2 ms, 1.75 A minimum for 1 ms and 1.75 A minimum for 0.65 ms during load dump along with 1.5 A minimum for 2 ms for VRES voltages less than 25 V.

Features

  • 8 deployment drivers with SPI selectable firing current and times.
  • Capability to deploy the squib with 1.2 A (min)/2 ms, 1.75 A (min)/1.0 ms and 1.75 A (min)/0.65 ms between VRES of 7 V to 37 V.
  • Capability to deploy the squib with 1.5 A (min)/2 ms between VRES of 7 V to 25 V.
  • Firing capability to deploy all channels simultaneously.
  • Independently controlled high-side and lowside MOS for diagnosis.
  • Analog output available for resistance measurement.
  • Squib short.

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Full PDF Text Transcription

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L9659 Octal squib driver ASIC for safety application Features ■ 8 deployment drivers with SPI selectable firing current and times ■ Capability to deploy the squib with 1.2 A (min)/2 ms, 1.75 A (min)/1.0 ms and 1.75 A (min)/0.65 ms between VRES of 7 V to 37 V ■ Capability to deploy the squib with 1.5 A (min)/2 ms between VRES of 7 V to 25 V ■ Firing capability to deploy all channels simultaneously ■ Independently controlled high-side and lowside MOS for diagnosis ■ Analog output available for resistance measurement ■ Squib short to ground, short to battery and MOS diagnostic available on SPI register ■ Capability to deploy the squib the low side MOS is shorted to ground ■ 4 fire enable inputs ■ 5.
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