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  • 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

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Related Applications

Chassis and Safety

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DB2439
      Advanced airbag IC for mid/high end applications
      1.0
      300.09 KB
      PDF
      DS11615
      Automotive advanced airbag IC for mid/high end applications
      2.0
      3.01 MB
      PDF
      DB2439

      Advanced airbag IC for mid/high end applications

      DS11615

      Automotive advanced airbag IC for mid/high end applications

    • Description Version Size Action
      AN4437
      L9678 user configurable airbag
      3.0
      4.03 MB
      PDF
      AN5023
      L9680 airbag system IC
      1.0
      2.35 MB
      PDF
      AN4437

      L9678 user configurable airbag

      AN5023

      L9680 airbag system IC

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L9680
Active
TQFP 100 14x14x1.0 Automotive Ecopack2
L9680TR
Active
TQFP 100 14x14x1.0 Automotive Ecopack2

L9680

Package:

TQFP 100 14x14x1.0

Material Declaration**:

Marketing Status

Active

Package

TQFP 100 14x14x1.0

Grade

Automotive

RoHS Compliance Grade

Ecopack2

L9680TR

Package:

TQFP 100 14x14x1.0

Material Declaration**:

Marketing Status

Active

Package

TQFP 100 14x14x1.0

Grade

Automotive

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L9680 No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tray TQFP 100 14x14x1.0 -40 95 MALAYSIA 6.9 / 1k
L9680TR Available at 2 distributors

Distributor availability ofL9680TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 100 1 Order Now
MOUSER WORLDWIDE 96 1 Order Now

Distributor reported inventory date: 2020-09-21

Distributor Name

DIGIKEY

Stock

100

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

96

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-09-21

Buy now
Active
EAR99 NEC Tape And Reel TQFP 100 14x14x1.0 -40 95 MALAYSIA 6.9 / 1k

L9680

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

6.9 / 1k

ECCN (EU)

NEC

Packing Type

Tray

Package

TQFP 100 14x14x1.0

Operating Temperature (°C)

(min)

-40

(max)

95

Budgetary Price (US$)* / Qty

6.9 / 1k

Country of Origin

MALAYSIA

L9680TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

6.9 / 1k

Distributor availability ofL9680TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 100 1 Order Now
MOUSER WORLDWIDE 96 1 Order Now

Distributor reported inventory date: 2020-09-21

Distributor Name

DIGIKEY

Stock

100

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

96

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-09-21

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

TQFP 100 14x14x1.0

Operating Temperature (°C)

(min)

-40

(max)

95

Budgetary Price (US$)* / Qty

6.9 / 1k

Country of Origin

MALAYSIA

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors