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UC2844D8TR - Texas Instruments

Description: Current-Mode PWM Controller

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UC2844D8TR Details

  • Manufacturer Part Number:

    UC2844D8TR

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    SOIC

  • Pin Count:

    8

  • Country Of Origin:

    Mexico

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.90

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    15

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    28 V

  • Input Voltage-Min:

    11 V

  • Input Voltage-Nom:

    15 V

  • JESD-30 Code:

    R-PDSO-G8

  • JESD-609 Code:

    e4

  • Length:

    4.9 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    8

  • Operating Temperature-Max:

    85 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Current-Max:

    1 A

  • Output Voltage-Nom:

    5 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP8,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    1.75 mm

  • Supply Current-Max (Isup):

    25 mA

  • Supply Voltage-Max (Vsup):

    28 V

  • Supply Voltage-Min (Vsup):

    16 V

  • Surface Mount:

    YES

  • Switcher Configuration:

    BUCK-BOOST

  • Switching Frequency-Max:

    500 kHz

  • Technology:

    BICMOS

  • Temperature Grade:

    INDUSTRIAL

  • Terminal Finish:

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

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

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

    30

  • Width:

    3.9 mm

UC2844D8TR Frequently Asked Questions (FAQs)

  • A good PCB layout for the UC2844D8TR involves keeping the input and output stages separate, using a star-ground configuration, and placing the IC close to the input capacitors. Additionally, using a ground plane and shielding can help reduce EMI.
  • When selecting a transformer for the UC2844D8TR, consider the output power, voltage, and current requirements. Choose a transformer with a suitable turns ratio, core material, and wire size to ensure efficient energy transfer and minimal losses.
  • The UC2844D8TR has an operating temperature range of -40°C to 85°C. However, the maximum ambient temperature depends on the specific application and thermal design. Ensure proper heat sinking and thermal management to maintain a safe operating temperature.
  • Yes, the UC2844D8TR can be used in resonant converter topologies, such as LLC or series resonant converters. However, additional components and design considerations are required to ensure proper operation and resonance.
  • The UC2844D8TR has a built-in overcurrent protection feature. To implement it, connect a sense resistor in series with the output inductor and connect the sense resistor to the IC's current sense pin. The IC will shut down if the current exceeds the programmed threshold.

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UC2844D8TR 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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