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UC3854AN - Texas Instruments

Description: Texas Instruments UC3854AN, Power Factor Pre-Regulator Circuit, 115 kHz, 10 → 20 V, 16-Pin PDIP

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UC3854AN - Texas Instruments - PCB symbol
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PCB Footprints
UC3854AN - Texas Instruments PCB footprint - Dual-In-Line Packages - Dual-In-Line Packages - N (R-PDIP-T16)
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UC3854AN - Texas Instruments - 3D model - Dual-In-Line Packages - N (R-PDIP-T16)
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UC3854AN Details

  • Manufacturer Part Number:

    UC3854AN

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    DIP

  • Pin Count:

    16

  • Country Of Origin:

    Mexico

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.90

  • Date Of Intro:

    1992-12-01

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    15

  • Analog IC - Other Type:

    POWER FACTOR CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    20 V

  • Input Voltage-Min:

    10 V

  • Input Voltage-Nom:

    18 V

  • JESD-30 Code:

    R-PDIP-T16

  • JESD-609 Code:

    e4

  • Length:

    19.305 mm

  • Number of Functions:

    1

  • Number of Terminals:

    16

  • Operating Temperature-Max:

    70 °C

  • Output Current-Max:

    1.5 A

  • Output Voltage-Max:

    7.6 V

  • Output Voltage-Min:

    7.4 V

  • Output Voltage-Nom:

    7.5 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    DIP

  • Package Equivalence Code:

    DIP16,.3

  • Package Shape:

    RECTANGULAR

  • Package Style:

    IN-LINE

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    5.08 mm

  • Supply Current-Max (Isup):

    12 mA

  • Supply Voltage-Max (Vsup):

    20 V

  • Supply Voltage-Nom (Vsup):

    18 V

  • Surface Mount:

    NO

  • Switcher Configuration:

    BOOST

  • Switching Frequency-Max:

    200 kHz

  • Technology:

    BIPOLAR

  • Temperature Grade:

    COMMERCIAL

  • Terminal Finish:

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

  • Terminal Form:

    THROUGH-HOLE

  • Terminal Pitch:

    2.54 mm

  • Terminal Position:

    DUAL

  • Width:

    7.62 mm

UC3854AN Frequently Asked Questions (FAQs)

  • The UC3854AN is a high-frequency device, and proper layout and placement are crucial to minimize EMI and noise. TI recommends a 4-layer PCB with a solid ground plane, and placing the IC close to the input capacitors and output inductors. Additionally, keep the feedback trace as short as possible and away from noisy signals.
  • The UC3854AN's voltage feedback loop requires compensation to ensure stability. TI recommends using a type-2 compensator with a zero at 1/3 of the switching frequency and a pole at 1/2 of the switching frequency. The compensator values can be calculated using TI's Power Stage Designer software or by following the application note SLUA121.
  • The UC3854AN has an absolute maximum rating of 18V for the input voltage. However, the recommended operating range is up to 15V to ensure reliable operation and to prevent damage to the internal voltage regulator.
  • Yes, the UC3854AN can be used in a synchronous rectification topology. However, it requires additional external circuitry to control the synchronous rectifier MOSFET. TI provides an application note (SLUA123) that provides guidance on designing a synchronous rectifier using the UC3854AN.
  • The UC3854AN's overcurrent protection is triggered by the voltage drop across the sense resistor (RS). Ensure that the sense resistor is properly sized and connected, and that the voltage at the CS pin is within the specified range (0.5V to 1.5V) to trigger the overcurrent protection correctly.

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UC3854AN 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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