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BD679A - STMicroelectronics

Description: BD679A, Darlington Transistor, NPN 4 A 80 V HFE:750, 3-Pin, SOT-32

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Symbol
BD679A - STMicroelectronics - PCB symbol
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PCB Footprints
BD679A - STMicroelectronics PCB footprint - Transistor Outline, Vertical - Transistor Outline, Vertical - SOT-32 (TO-126)
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3D Models
BD679A - STMicroelectronics - 3D model - Transistor Outline, Vertical - SOT-32 (TO-126)
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BD679A Details

  • Manufacturer Part Number:

    BD679A

  • Brand Name:

    STMicroelectronics

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    SIP

  • Package Description:

    ROHS COMPLIANT PACKAGE-3

  • Pin Count:

    3

  • Country Of Origin:

    India

  • ECCN Code:

    EAR99

  • HTS Code:

    8541.29.00.95

  • Factory Lead Time:

    14 Weeks

  • Manufacturer:

    STMicroelectronics

  • YTEOL:

    9

  • Case Connection:

    ISOLATED

  • Collector Current-Max (IC):

    4 A

  • Collector-Emitter Voltage-Max:

    80 V

  • Configuration:

    DARLINGTON WITH BUILT-IN DIODE AND RESISTOR

  • DC Current Gain-Min (hFE):

    750

  • JEDEC-95 Code:

    TO-126

  • JESD-30 Code:

    R-PSFM-T3

  • JESD-609 Code:

    e3

  • Number of Elements:

    1

  • Number of Terminals:

    3

  • Operating Temperature-Max:

    150 °C

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Shape:

    RECTANGULAR

  • Package Style:

    FLANGE MOUNT

  • Peak Reflow Temperature (Cel):

    NOT SPECIFIED

  • Polarity/Channel Type:

    NPN

  • Power Dissipation Ambient-Max:

    40 W

  • Power Dissipation-Max (Abs):

    40 W

  • Qualification Status:

    Not Qualified

  • Surface Mount:

    NO

  • Terminal Finish:

    Matte Tin (Sn)

  • Terminal Form:

    THROUGH-HOLE

  • Terminal Position:

    SINGLE

  • Time@Peak Reflow Temperature-Max (s):

    NOT SPECIFIED

  • Transistor Application:

    SWITCHING

  • Transistor Element Material:

    SILICON

  • Transition Frequency-Nom (fT):

    10 MHz

  • VCEsat-Max:

    2.8 V

BD679A Frequently Asked Questions (FAQs)

  • A good PCB layout for the BD679A involves keeping the input and output traces separate, using a ground plane, and placing decoupling capacitors close to the IC. A 4-layer PCB with a dedicated power plane and a solid ground plane is recommended.
  • To ensure the BD679A operates within the SOA, implement a soft-start circuit to limit the inrush current during startup. During shutdown, use a controlled shutdown sequence to prevent voltage spikes and ensure a gradual decrease in output voltage.
  • The BD679A has a high power density, so thermal management is crucial. Ensure good airflow, use a heat sink with a thermal interface material, and consider using a thermal pad or thermal tape to improve heat dissipation.
  • To troubleshoot oscillations or instability issues, check the PCB layout for noise coupling, ensure proper decoupling, and verify the output filter design. Also, check the input voltage and current, and verify that the device is operating within the recommended operating conditions.
  • For EMI filtering, use a pi-filter or a common-mode choke to reduce conducted emissions. Ensure the filter components are placed close to the IC, and use a shielded enclosure to reduce radiated emissions.

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BD679A 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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BD679A Alternates

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Part Image BD679 Continental Device India Ltd

Power Bipolar Transistor, 4A I(C), 80V V(BR)CEO, 1-Element, NPN, Silicon, TO-126, Plastic/Epoxy, 3 Pin
Part Image BD679A Continental Device India Ltd

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Part Image BD679ASTU Fairchild Semiconductor Corporation

Power Bipolar Transistor, 4A I(C), 80V V(BR)CEO, 1-Element, NPN, Silicon, TO-126, Plastic/Epoxy, 3 Pin
Part Image BD679G onsemi

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Part Image BD679 Baneasa SA

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For a full list of alternate parts for BD679A, check out Findchips.com