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UCC3818D - Texas Instruments

Description: Texas Instruments UCC3818D, Power Factor Pre-Regulator Circuit, 115 kHz, 12 → 17 V, 16-Pin SOIC

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UCC3818D - Texas Instruments - PCB symbol
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PCB Footprints
UCC3818D - Texas Instruments PCB footprint - Other - Other - SOIC127P600X175-16N
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UCC3818D - Texas Instruments - 3D model - Other - SOIC127P600X175-16N
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UCC3818D Details

  • Manufacturer Part Number:

    UCC3818D

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    SOIC

  • Pin Count:

    16

  • Country Of Origin:

    Mexico

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.90

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    15

  • Analog IC - Other Type:

    POWER FACTOR CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    18 V

  • Input Voltage-Min:

    10.3 V

  • Input Voltage-Nom:

    12 V

  • JESD-30 Code:

    R-PDSO-G16

  • JESD-609 Code:

    e4

  • Length:

    9.9 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    16

  • Operating Temperature-Max:

    70 °C

  • Output Current-Max:

    1.2 A

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP16,.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):

    4 mA

  • Supply Voltage-Max (Vsup):

    18 V

  • Supply Voltage-Nom (Vsup):

    12 V

  • Surface Mount:

    YES

  • Switcher Configuration:

    BOOST

  • Switching Frequency-Max:

    250 kHz

  • Technology:

    BICMOS

  • 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:

    3.9 mm

UCC3818D Frequently Asked Questions (FAQs)

  • TI recommends a 4-layer PCB with a solid ground plane, and placing the UCC3818D close to the input capacitors and output inductors to minimize loop areas and reduce EMI. Additionally, a shielded enclosure and proper cable shielding can help reduce radiated emissions.
  • The compensation network can be optimized by using the TI-provided spreadsheet or by using a network analyzer to measure the loop gain and phase margin. The goal is to achieve a phase margin of at least 45° and a gain margin of at least 10 dB.
  • The maximum allowed input voltage ripple is 10% of the nominal input voltage. Exceeding this limit can cause the UCC3818D to malfunction or oscillate.
  • Yes, the UCC3818D can be used in a synchronous rectification topology, but it requires additional external circuitry to control the synchronous rectifier MOSFET. TI provides application notes and reference designs for this topology.
  • To troubleshoot oscillations or instability issues, check the PCB layout, component values, and compensation network. Use an oscilloscope to measure the output voltage and current, and check for signs of oscillation or ringing. Consult the TI application notes and technical support resources for further guidance.

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UCC3818D 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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