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L9945 - STMicroelectronics

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

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L9945 - STMicroelectronics - PCB symbol
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PCB Footprints
L9945 - STMicroelectronics PCB footprint - Quad Flat Packages - Quad Flat Packages - TQFP64_1
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3D Models
L9945 - STMicroelectronics - 3D model - Quad Flat Packages - TQFP64_1
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L9945 Details

  • Manufacturer Part Number:

    L9945

  • Brand Name:

    STMicroelectronics

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    TQFP-64

  • Country Of Origin:

    Malaysia

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Date Of Intro:

    2019-09-26

  • Manufacturer:

    STMicroelectronics

  • YTEOL:

    9

  • High Side Driver:

    YES

  • Input Characteristics:

    STANDARD

  • Interface IC Type:

    HALF BRIDGE BASED MOSFET DRIVER

  • JESD-30 Code:

    S-PQFP-G64

  • JESD-609 Code:

    e4

  • Length:

    10 mm

  • Moisture Sensitivity Level:

    3

  • Number of Functions:

    1

  • Number of Terminals:

    64

  • Operating Temperature-Max:

    150 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Characteristics:

    STANDARD

  • Output Polarity:

    TRUE

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    HTFQFP

  • Package Equivalence Code:

    TQFP64,.47SQ,20

  • Package Shape:

    SQUARE

  • Package Style:

    FLATPACK, HEAT SINK/SLUG, THIN PROFILE, FINE PITCH

  • Peak Reflow Temperature (Cel):

    260

  • Screening Level:

    AEC-100; TS 16949

  • Seated Height-Max:

    1.2 mm

  • Supply Current-Max:

    50 mA

  • Supply Voltage-Max:

    36 V

  • Supply Voltage-Min:

    3.8 V

  • Supply Voltage-Nom:

    8 V

  • Surface Mount:

    YES

  • Terminal Finish:

    Nickel/Palladium/Gold/Silver (Ni/Pd/Au/Ag)

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    0.5 mm

  • Terminal Position:

    QUAD

  • Turn-off Time:

    1.5 µs

  • Turn-on Time:

    1.5 µs

  • Width:

    10 mm

L9945 Frequently Asked Questions (FAQs)

  • STMicroelectronics recommends a 2-layer or 4-layer PCB with a solid ground plane and a thermal relief pattern under the IC to ensure optimal thermal performance. A minimum of 2 oz copper thickness is recommended.
  • The input capacitor should be chosen based on the input voltage ripple requirement and the maximum input current. A minimum capacitance of 10uF is recommended, with a voltage rating of at least 1.5 times the maximum input voltage.
  • The L9945 can deliver up to 3A of output current, but this is dependent on the input voltage, output voltage, and thermal conditions. It's recommended to check the thermal derating curves in the datasheet to ensure the device can handle the required output current.
  • The L9945 has a built-in overcurrent protection feature that can be enabled by connecting a resistor between the OCP pin and the GND pin. The value of the resistor determines the overcurrent threshold. A detailed calculation for the resistor value is provided in the datasheet.
  • The EN pin is an active-high enable input that allows the device to be turned on and off. When the EN pin is high, the device is enabled, and when it's low, the device is disabled. This pin can be used to implement power sequencing or to turn off the device during shutdown or standby modes.

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L9945 Overview

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About STMicroelectronics

STMicroelectronics (ST) is a global semiconductor company that designs, manufactures, and markets a broad range of integrated circuits (ICs), discrete devices, and other electronic components. STMicroelectronics offers a diverse portfolio of semiconductor products covering a wide range of applications and industries. Their product categories include microcontrollers, analog and mixed-signal ICs, MEMS (Micro-Electro-Mechanical Systems) sensors, power management ICs, RF (Radio Frequency) transceivers, aut

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