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UC3843BVDG - onsemi

Description: Obsolete - High Performance Current Mode PWM Controller

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UC3843BVDG - onsemi PCB footprint - Small Outline Packages - Small Outline Packages - SOIC-14 NB CASE751A-03 ISSUE K
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UC3843BVDG - onsemi  - 3D model - Small Outline Packages - SOIC-14 NB CASE751A-03 ISSUE K
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UC3843BVDG Details

  • Manufacturer Part Number:

    UC3843BVDG

  • Brand Name:

    onsemi

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    SOIC-14 NB

  • Package Description:

    SOIC-14

  • Pin Count:

    14

  • Manufacturer Package Code:

    751A-03

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Manufacturer:

    onsemi

  • YTEOL:

    0

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    25 V

  • Input Voltage-Min:

    12 V

  • Input Voltage-Nom:

    15 V

  • JESD-30 Code:

    R-PDSO-G14

  • JESD-609 Code:

    e3

  • Length:

    8.65 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    14

  • Operating Temperature-Max:

    105 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Current-Max:

    1 A

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP14,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Packing Method:

    RAIL

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    1.75 mm

  • Surface Mount:

    YES

  • Switcher Configuration:

    BUCK-BOOST

  • Switching Frequency-Max:

    500 kHz

  • Technology:

    BIPOLAR

  • Temperature Grade:

    INDUSTRIAL

  • Terminal Finish:

    Matte Tin (Sn) - annealed

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

  • Time@Peak Reflow Temperature-Max (s):

    30

  • Width:

    3.9 mm

UC3843BVDG Frequently Asked Questions (FAQs)

  • The recommended operating voltage range for the UC3843BVDG is 12V to 28V, with a maximum rating of 30V.
  • The oscillator circuit resistor values (Rt and Ct) can be calculated using the formulae provided in the datasheet. A general guideline is to choose Rt = 10kΩ to 100kΩ and Ct = 3.3nF to 10nF for a frequency range of 10kHz to 100kHz.
  • The soft-start pin (SS) is used to gradually increase the output voltage during startup, reducing inrush currents and electromagnetic interference (EMI). Connect a capacitor (typically 10nF to 100nF) from the SS pin to ground to set the soft-start time.
  • The UC3843BVDG has a built-in voltage reference with a tolerance of ±2%. To compensate for this tolerance, add a voltage trimming circuit or use a voltage reference with a tighter tolerance.
  • The maximum switching frequency of the UC3843BVDG is approximately 500kHz, but it's recommended to operate at frequencies below 300kHz for optimal performance and reduced EMI.

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UC3843BVDG Overview

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Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO14