Automotive fully configurable 8-channel High/Low side MOSFET

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  • The L9945 is an 8-channel MOSFET pre-driver configurable for low-side, high-side, peak and hold and H-Bridge load control. It is designed to comply with the requirements of 12 V (passenger vehicle) and 24 V (commercial vehicle) battery systems.

    All outputs can be PWM controlled. Six outputs are capable of driving safety relevant loads. One output can be dedicated to the actuation of safety relevant loads requiring a dedicated enable pin (EN6).
    The device offers the possibility of controlling two independent H-Bridges.
    The device can also drive up to two loads requiring "peak & hold" control strategy.
    The driver outputs are protected against short circuit condition.
    The device protects the external MOS in case of an overcurrent event.
    Each output provides full diagnostic information such as short to battery, short to ground and open-load. Each output status can be constantly monitored through dedicated SPI registers.
    The voltage slew rate of the external transistors 1-8 is controlled during turn ON and turn OFF in order to improve EMI behavior.
    A double, redundant, external disable source is available through DIS and NDIS pins in order to improve safety.
    The device is configurable via SPI through a 32-bit protocol.

    Key Features

    • AEC-Q100 qualified
    • 12 V and 24 V battery systems compliance
    • 3.3 V and 5 V logic compatible I/O
    • 8-channel configurable MOSFET pre-driver
      • High-side (N-channel and P-channel MOS)
      • Low-side (N-channel MOS)
      • H-bridge (up to 2 H-bridge)
      • Peak & Hold (2 loads)
    • Operating battery supply voltage 3.8 V to 36 V
    • Operating VDD supply voltage 4.5 V to 5.5 V
    • All device pins, except the ground pins, withstand at least 40 V
    • Programmable gate charge/discharge currents for improving EMI behavior
    • Individual diagnosis for:
      • Short circuit to battery
      • Open load
      • Short circuit to ground
    • Highly flexible overcurrent sensing implementation
      • Possibility of monitoring external MOS drain to source voltage
      • Possibility of monitoring voltage on external shunt resistor
      • 64 programmable overcurrent thresholds independent for each channel
      • Ultra-fast output shutdown in case of overcurrent
    • Current limitation for H-Bridge configuration
    • 32-bit SPI protocol available for configuration and diagnostics
      • Failures latched even if they occur during diagnostics reading
      • Daisy chain operation
      • SDO protected against overvoltage
    • Safety features
      • Fast switch off redundant output disable through two external pins
      • Built In Self Test (BIST) for logic operation
      • Hardware Self Check (HWSC) for VDD5 overvoltage comparator
      • Configurable Communication Check (CC) watchdog timer available
      • Disable feedback through bi-directional pin
      • Highly redundant output monitoring through dedicated SPI registers
    • 10-bit ADC for battery and die temperature measurements available through SPI
    • VDD5 monitoring for over/under voltage
    • VPS (battery) monitoring for under voltage

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Packing Type
Temperature (°C) ECCN (US)
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L9945TR
Active
1000 4.5 TQFP 64 10x10x1.0 Tape And Reel - - EAR99
MORE INFO

Country of Origin:

MALAYSIA

Check Availability

Distributor availability ofL9945TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 200 1 Order Now
MOUSER WORLDWIDE 540 1 Order Now

Distributor reported inventory date: 2019-11-21

Distributor Name

DIGIKEY

Stock

200

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

540

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-11-21

Buy now
L9945
Active
1000 4.5 TQFP 64 10x10x1.0 Tray - - EAR99
MORE INFO

Country of Origin:

MALAYSIA

No availability of distributors reported, please contact our sales office

L9945TR

Marketing Status

Active

Quantity

1000

Unit Price (US$)

4.5*

Distributor availability ofL9945TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 200 1 Order Now
MOUSER WORLDWIDE 540 1 Order Now

Distributor reported inventory date: 2019-11-21

Distributor Name

DIGIKEY

Stock

200

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

540

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-11-21

Unit Price (US$)

4.5

Package

TQFP 64 10x10x1.0

Packing Type

Tape And Reel

Operating Temperature (°C)

(min)

-

(max)

-

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L9945

Marketing Status

Active

Quantity

1000

Unit Price (US$)

4.5*

Unit Price (US$)

4.5

Package

TQFP 64 10x10x1.0

Packing Type

Tray

Operating Temperature (°C)

(min)

-

(max)

-

ECCN (US)

EAR99

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

Evaluation Tools

    • Part Number

      Evaluation board for L9945 engine management system

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS12275
      Automotive fully configurable 8-channel High/Low side MOSFET pre-driver suitable for 12 V and 24 V systems
      7.0
      1.52 MB
      PDF
      DS12275

      Automotive fully configurable 8-channel High/Low side MOSFET pre-driver suitable for 12 V and 24 V systems

    • Description Version Size Action
      AN5074
      Charge pump stress estimation in switching applications
      1.0
      1.84 MB
      PDF
      AN5078
      Criteria for configuring L9945 diagnostic parameters in automotive switching applications
      1.1
      3.86 MB
      PDF
      AN5084
      How to improve EMI behavior in switching applications
      1.0
      4.69 MB
      PDF
      AN5402
      L9945 H-Bridge direction switching recommendations
      1.0
      966.89 KB
      PDF
      AN5311
      L9945 in H-bridge configuration
      1.2
      700.05 KB
      PDF
      AN5074

      Charge pump stress estimation in switching applications

      AN5078

      Criteria for configuring L9945 diagnostic parameters in automotive switching applications

      AN5084

      How to improve EMI behavior in switching applications

      AN5402

      L9945 H-Bridge direction switching recommendations

      AN5311

      L9945 in H-bridge configuration

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L9945
Active
TQFP 64 10x10x1.0 Automotive Ecopack2
L9945TR
Active
TQFP 64 10x10x1.0 Automotive Ecopack2

L9945

Package:

TQFP 64 10x10x1.0

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TQFP 64 10x10x1.0

Grade

Automotive

RoHS Compliance Grade

Ecopack2

L9945TR

Package:

TQFP 64 10x10x1.0

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TQFP 64 10x10x1.0

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.

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