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UC3871DWTR - Texas Instruments

Description: Display Drivers & Controllers Resonant Fluorescent Lamp Driver

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UC3871DWTR - Texas Instruments - PCB symbol
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PCB Footprints
UC3871DWTR - Texas Instruments PCB footprint - Small Outline Packages - Small Outline Packages - DW (R-PDSO-G18)
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UC3871DWTR - Texas Instruments - 3D model - Small Outline Packages - DW (R-PDSO-G18)
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UC3871DWTR Details

  • Manufacturer Part Number:

    UC3871DWTR

  • Brand Name:

    Texas Instruments

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    SOIC

  • Package Description:

    SOIC-18

  • Pin Count:

    18

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    0

  • Analog IC - Other Type:

    FLUORESCENT LIGHT CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    RESONANT CONTROL

  • Input Voltage-Max:

    20 V

  • Input Voltage-Min:

    4.5 V

  • Input Voltage-Nom:

    5 V

  • JESD-30 Code:

    R-PDSO-G18

  • JESD-609 Code:

    e4

  • Length:

    11.55 mm

  • Moisture Sensitivity Level:

    2

  • Number of Functions:

    1

  • Number of Terminals:

    18

  • Operating Temperature-Max:

    70 °C

  • Output Current-Max:

    0.1 A

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP18,.4

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    2.65 mm

  • Supply Current-Max (Isup):

    14 mA

  • Surface Mount:

    YES

  • Switcher Configuration:

    PUSH-PULL

  • Switching Frequency-Max:

    78 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

UC3871DWTR Frequently Asked Questions (FAQs)

  • The UC3871DWTR is a high-frequency switching regulator, and proper layout and placement are crucial for its operation. TI recommends a 4-layer PCB with a solid ground plane, and the IC should be placed close to the input capacitors. The switching node (SW pin) should be kept away from sensitive nodes, and the output filter components should be placed close to the output pins.
  • The inductor selection depends on the output current, switching frequency, and output voltage. TI recommends using a shielded inductor with a low DC resistance and high saturation current. The inductor value should be chosen to ensure that the peak inductor current is within the recommended range (typically 1.5 to 2 times the output current).
  • The UC3871DWTR has an absolute maximum input voltage rating of 18V. However, the recommended operating input voltage range is 7V to 15V. Exceeding the maximum input voltage can damage the IC.
  • The output voltage of the UC3871DWTR can be adjusted by changing the resistor divider ratio (R1 and R2) connected to the FB pin. The output voltage is determined by the equation: Vout = 2.5V x (1 + R2/R1).
  • The bootstrap capacitor (CB) is used to generate the gate drive voltage for the high-side MOSFET. It is charged through the internal diode (D1) during the off-time of the switch, and it provides the necessary voltage to turn on the high-side MOSFET during the on-time.

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UC3871DWTR 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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UC3871DWTR Alternates

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For a full list of alternate parts for UC3871DWTR, check out Findchips.com