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Squib driver circuit diagnostic system and method

  • US 20080086250A1
  • Filed: 10/05/2006
  • Published: 04/10/2008
  • Est. Priority Date: 10/05/2006
  • Status: Abandoned Application
First Claim
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1. A squib driver module comprising:

  • a squib circuit for deploying a squib, the squib circuit including a high side driver and a low side driver in combination for driving a firing signal to the squib;

    a control circuit coupled to the squib circuit for activating the firing signal in response to a firing condition by sending an HSD control signal to the high side driver and an LSD control signal to the low side driver;

    squib diagnostic circuits coupled to the high side driver and to the low side driver for conducting diagnostic tests without activating the firing signal to the squib and without delivering a diagnostic signal equivalent of the firing signal to the squib, the squib diagnostic circuits for generating digital fault information based on the diagnostic tests;

    diagnostic registers for storing the digital fault information;

    logic for recognizing a fault condition based on the digital fault information; and

    a communication module for communicating the fault condition over a communication channel to a microprocessor unit.

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