L9680:Advanced airbag IC for mid/high end applications

The L9680 is an advanced airbag system chip solution targeted for mature airbag market and integrated safety markets. This device is family compatible with the L9678 and L9679 devices. Safety system integration is enabled through higher power supply currents and integrated active wheel speed sensor interface. The active wheel speed interface is shared with the PSI-5 satellite interface to create a generic remote safety sensor interface compliant to both systems.

High frequency power supply design allows further cost reduction by using smaller and less expensive external components. All switching regulators operate at 1.882 MHz while buck converters have integrated synchronous rectifiers.

Additional attention is given to system integrity and diagnostics. The reserve capacitor is electrically isolated from the boost regulator by a 65 mA nominal fixed current source, controlling in-rush an additional capacitor discharge fixed current source is integrated to diagnose the reserve capacitor value and ESR. The same current sources can be used to discharge the capacitor at shutdown.

Thanks to low quiescent current, the device can be directly connected to battery. In this way, the device start-up and shutdown are controlled through the wake-up input function. The power supply and crossover function are controlled automatically through the internal state machine.

The user can select both ECU logic voltage (VCCat 3.3 V or 5.0 V) and energy reserve output voltage (at either 23 V or 33 V). Deployment voltage is set to a maximum of 25 V for all profiles and can be controlled through external safing switch circuit using the high side safing switch reference enabled through the system SPI interface or the arming logic.

Key Features

  • AEC-Q100 qualified
  • Boost regulator for energy reserve
    • 1.882 MHz operation, Iload = 70 mA max
    • Output voltage user selectable, 23 V/ 33 V ±5%
    • Capacitor value & ESR diagnostics
  • Boost regulator for PSI-5 SYNC pulse
    • 1.882 MHz operation,
    • Output voltage, 12 V/14.75 V, user configurable
  • Buck regulator for remote sensor
    • 1.882 MHz operation
    • Output voltage, 7.2 V/9 V ±4%, user configurable
  • Buck regulator for micro controller unit
    • 1.882 MHz operation
    • Output voltage user selectable, 3.3 V or 5.0 V ±3%
  • Integrated energy reserve crossover switch
    • 3 Ω - 912 mA max
    • Switch active output indicator
  • Battery voltage monitor & shutdown control with Wake-up control
  • System voltage diagnostics with integrated ADC
  • Squib deployment drivers
    • 12 channel HSD/LSD
    • 25 V max deployment voltage
    • Various deployment profiles
    • Current monitoring
    • Rmeasure , STB, STG & Leakage diagnostics
    • High & low side driver FET tests
  • High side safing switch regulator and enable control
  • Four channel remote sensor interface
    • PSI-5 satellite sensors
    • Active wheel speed sensors
  • Three channel GPO, HSD or LSD configurable, with PWM 0-100% control
  • Nine channel hall-effect, resistive or switch sensor interface
  • User customizable safing logic
  • Specific disarm signal for passenger airbag
  • Temporal and algorithmic Watchdog timers
  • End of life disposal interface
  • Temperature sensor
  • 32 bit SPI communications
  • 5.5 V minimum operating voltage at device battery pin
  • Operating temperature, -40 to 95 °C
  • Packaging - 100 pin
产品规格
DescriptionVersionSize
DB2439: Advanced airbag IC for mid/high end applications1.0300 KB
DS11615: Automotive advanced airbag IC for mid/high end applications1.02 MB
应用手册
DescriptionVersionSize
AN4437: L9678 user configurable airbag3.04 MB
样片和购买
型号QuantityUnit Price (US$) *PackagePacking TypeOperating Temperature (°C) (min)Operating Temperature (°C) (max)ECCN (EU)ECCN (US)Country of Origin
L9680--TQFP 100 14x14x1.0Tray-4095NECEAR99-
L9680TR--TQFP 100 14x14x1.0Tape And Reel-4095NECEAR99MALAYSIA
质量和可靠性
型号PackageGradeRoHS Compliance GradeMaterial Declaration**
L9680TQFP 100 14x14x1.0AutomotiveEcopack2ipc-wspc-1752a_a9ye-uaf3bb1.pdf
ipc-wspc-1752a_a9ye-uaf3bb1.xml
L9680TRTQFP 100 14x14x1.0AutomotiveEcopack2ipc-wspc-1752a_a9ye-uaf3cc1_signed.pdf
ipc-wspc-1752a_a9ye-uaf3cc1.xml
Automotive advanced airbag IC for mid/high end applications L9680
Advanced airbag IC for mid/high end applications L9680
DB2439: Advanced airbag IC for mid/high end applications L9680
L9678 user configurable airbag L9680
ipc-wspc-1752a_a9ye-uaf3bb1.pdf L9680
ipc-wspc-1752a_a9ye-uaf3bb1.xml L9680
ipc-wspc-1752a_a9ye-uaf3cc1_signed.pdf L9680
ipc-wspc-1752a_a9ye-uaf3cc1.xml L9680