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UC3849DW - Texas Instruments

Description: Switching Controllers Sec Side Avg Current Mode

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Symbol
UC3849DW - Texas Instruments - PCB symbol
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PCB Footprints
UC3849DW - Texas Instruments PCB footprint - Small Outline Packages - Small Outline Packages - DW (R-PDSO-G24)
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3D Models
UC3849DW - Texas Instruments - 3D model - Small Outline Packages - DW (R-PDSO-G24)
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UC3849DW Details

  • Manufacturer Part Number:

    UC3849DW

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    SOIC

  • Package Description:

    GREEN, PLASTIC, SOIC-24

  • Pin Count:

    24

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    0

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    20 V

  • Input Voltage-Min:

    8 V

  • Input Voltage-Nom:

    12 V

  • JESD-30 Code:

    R-PDSO-G24

  • JESD-609 Code:

    e4

  • Length:

    15.4 mm

  • Moisture Sensitivity Level:

    2

  • Number of Functions:

    1

  • Number of Terminals:

    24

  • Operating Temperature-Max:

    70 °C

  • Output Current-Max:

    0.3 A

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP24,.4

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    2.65 mm

  • Surface Mount:

    YES

  • Switcher Configuration:

    SINGLE

  • Switching Frequency-Max:

    550 kHz

  • Technology:

    BIPOLAR

  • Temperature Grade:

    COMMERCIAL

  • Terminal Finish:

    NICKEL PALLADIUM GOLD

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

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

    30

  • Width:

    7.5 mm

UC3849DW Frequently Asked Questions (FAQs)

  • The maximum voltage rating for the UC3849DW is 30V. However, it's recommended to operate it within 15V to ensure reliable operation and to prevent damage to the internal circuitry.
  • The oscillator circuit resistor values (Rt and Ct) depend on the desired switching frequency. A good starting point is to use the values recommended in the datasheet (Rt = 10kΩ, Ct = 3.3nF for 250kHz). Then, adjust them based on the specific application requirements and the desired frequency.
  • The bootstrap capacitor (Cb) is used to provide a high-voltage supply to the gate driver stage, allowing the UC3849DW to drive the power MOSFET's gate. It's essential for proper operation and should be chosen based on the specific application requirements (typically 10nF to 100nF).
  • The UC3849DW requires a stable bias voltage (Vcc) between 8V and 15V. Ensure that the power supply is decoupled with a capacitor (e.g., 10uF) and that the voltage regulator (if used) is stable and can provide the required current.
  • The maximum current rating for the UC3849DW's output stage is 1A peak. However, the actual current handling capability depends on the specific application, PCB layout, and thermal considerations. It's essential to ensure proper heat sinking and to follow the recommended layout guidelines.

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UC3849DW Overview

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About Texas Instruments

Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.

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UC3849DW Alternates

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Part Image UC3849DW Unitrode Corporation

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For a full list of alternate parts for UC3849DW, check out Findchips.com