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UC2844AD - Texas Instruments

Description: UC2844AD, PWM Current Mode Controller, 1A Boost, Buck, Flyback, 500kHz 14-Pin SOIC

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UC2844AD Details

  • Manufacturer Part Number:

    UC2844AD

  • Brand Name:

    Texas Instruments

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    SOIC

  • Pin Count:

    14

  • Country Of Origin:

    Mexico

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    0

  • 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-G14

  • JESD-609 Code:

    e4

  • Length:

    8.65 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    14

  • Operating Temperature-Max:

    85 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Current-Max:

    1 A

  • Output Voltage-Max:

    5.05 V

  • Output Voltage-Min:

    4.95 V

  • Output Voltage-Nom:

    5 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP14,.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

  • Supply Voltage-Nom (Vsup):

    11 V

  • Surface Mount:

    YES

  • Switcher Configuration:

    BUCK-BOOST

  • Switching Frequency-Max:

    500 kHz

  • Technology:

    BIPOLAR

  • 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

UC2844AD Frequently Asked Questions (FAQs)

  • The recommended input voltage range for the UC2844AD is 12V to 35V, although it can operate up to 40V with reduced performance.
  • The inductor value depends on the output voltage, output current, and switching frequency. A good starting point is to use the inductor value calculation formula provided in the datasheet, and then adjust based on the specific application requirements.
  • The soft-start pin (SS) is used to slowly ramp up the output voltage during startup to prevent inrush currents. Connect a capacitor from the SS pin to ground, and the IC will slowly charge the capacitor to control the output voltage rise time.
  • The UC2844AD can be synchronized with an external clock signal by connecting the clock signal to the SYNC pin. The SYNC pin is sensitive to the rising edge of the clock signal, and the IC will synchronize its switching frequency to the external clock frequency.
  • The maximum duty cycle of the UC2844AD is 90%. Exceeding this limit may cause instability or damage to the IC.

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UC2844AD 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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