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UC3827DW-1 - Texas Instruments

Description: Texas Instruments UC3827DW-1, PWM Current Mode Controller, Triple 0.25 A, 500 kHz 24-Pin SOIC

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UC3827DW-1 - Texas Instruments PCB footprint - Small Outline Packages - Small Outline Packages - DW(R-PDSO-G24) HEIGHT=2.65
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UC3827DW-1 - Texas Instruments  - 3D model - Small Outline Packages - DW(R-PDSO-G24) HEIGHT=2.65
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UC3827DW-1 Details

  • Manufacturer Part Number:

    UC3827DW-1

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    SOIC

  • Pin Count:

    24

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.90

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    15

  • Additional Feature:

    CAN ALSO WORK IN CURRENT MODE

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    20 V

  • Input Voltage-Min:

    9.5 V

  • Input Voltage-Nom:

    15 V

  • JESD-30 Code:

    R-PDSO-G24

  • JESD-609 Code:

    e4

  • Length:

    15.4 mm

  • Moisture Sensitivity Level:

    3

  • Number of Functions:

    1

  • Number of Terminals:

    24

  • Operating Temperature-Max:

    70 °C

  • Output Current-Max:

    1 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

  • Supply Current-Max (Isup):

    1 mA

  • Supply Voltage-Max (Vsup):

    20 V

  • Supply Voltage-Min (Vsup):

    8.8 V

  • Surface Mount:

    YES

  • Switcher Configuration:

    PUSH-PULL

  • Switching Frequency-Max:

    500 kHz

  • Technology:

    BIPOLAR

  • Temperature Grade:

    COMMERCIAL

  • 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:

    7.5 mm

UC3827DW-1 Frequently Asked Questions (FAQs)

  • TI recommends a 4-layer PCB with a solid ground plane, and placing the IC close to the input capacitors. Also, keep the high-frequency components (e.g. switching FETs, diodes) away from the low-frequency components (e.g. feedback resistors, capacitors).
  • Choose a transformer with a turns ratio that matches the desired output voltage, and ensure it can handle the maximum output current. Also, consider the transformer's leakage inductance, magnetizing inductance, and core losses when selecting the right one.
  • The maximum duty cycle for the UC3827DW-1 is typically around 0.95. Exceeding this limit can cause the output voltage to droop or become unstable. To maintain a stable output voltage, ensure the duty cycle is within the recommended range.
  • Use a type-2 or type-3 compensator network to stabilize the voltage feedback loop. The compensator network should be designed to provide a phase margin of at least 45° and a gain margin of at least 10 dB.
  • Use a low-ESR ceramic or film capacitor with a value between 10uF to 100uF, depending on the input voltage and current requirements. Ensure the capacitor can handle the maximum input voltage and ripple current.

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UC3827DW-1 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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For a full list of alternate parts for UC3827DW-1, check out Findchips.com