L9680 Automotive advanced airbag for mid/high end applications and cut-off battery IC Datasheet - production data System voltage diagnostics with integrated ADC Squib/pyroswitch deployment drivers 12 channel HSD/LSD 25 V max deployment voltage Various deployment profiles GAPGPS02184 Current monitoring TQFP100 exposed pad down R , STB, STG & Leakage measure (14x14x1.0mm) diagnostics High & low side driver FET tests High side safing switch regulator and enable control Four channel remote sensor interface Features PSI-5 satellite sensors AEC-Q100 qualified Active wheel speed sensors Boost regulator for energy reserve Three channel GPO, HSD or LSD configurable, 1.882 MHz operation, I = 70 mA max load with PWM 0-100% control Output voltage user selectable, 23 V/ 33 V Nine channel hall-effect, resistive or switch 5% sensor interface Capacitor value & ESR diagnostics User customizable safing logic Boost regulator for PSI-5 SYNC pulse Specific disarm signal for passenger airbag 1.882 MHz operation, Temporal and algorithmic Watchdog timers Output voltage, 12 V/14.75 V, user configurable End of life disposal interface Buck regulator for remote sensor Temperature sensor 1.882 MHz operation 32 bit SPI communications Output voltage, 7.2 V/9 V 4%, user 5.5 V minimum operating voltage at device configurable battery pin Buck regulator for micro controller unit Operating temperature, -40 to 95 C 1.882 MHz operation Packaging - 100 pin Output voltage user selectable, 3.3 V or 5.0 V 3% Applications Integrated energy reserve crossover switch 3 - 912 mA max Mid/High end airbag systems Switch active output indicator Cut-off battery systems Battery voltage monitor & shutdown control Pyro Fuse/Pyroswitch management with Wake-up control September 2021 DS11615 Rev 3 1/286 This is information on a product in full production. www.st.comContents L9680 Contents 1 Description 13 2 Absolute maximum ratings 14 3 Operative maximum ratings 18 4 Pin out . 22 5 Overview and block diagram . 23 5.1 Power supply 24 5.2 Deployment drivers . 24 5.3 Remote sensor interfaces (4) 25 5.4 DC sensor interfaces (9) . 25 5.5 General purpose outputs (3) 25 5.6 Arming logic . 25 5.7 Other features . 26 6 Start-up and power control 27 6.1 Power supply overview . 27 6.2 Power mode control . 29 6.2.1 POWER OFF mode 30 6.2.2 SLEEP mode . 30 6.2.3 ACTIVE mode 30 6.2.4 PASSIVE mode . 30 6.2.5 Power-up and power-down sequences . 33 6.2.6 IC operating states . 38 6.3 ERBOOST switching regulator . 39 6.4 Energy reserve capacitor charging and discharging circuits 41 6.5 ER CAP diagnostic 42 6.5.1 ER CAP measurement . 42 6.5.2 ER CAP ESR measurement . 44 6.6 ER switch and COVRACT pin . 45 6.7 SYNCBOOST boost regulator . 46 2/286 DS11615 Rev 3