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UC3842BD1G - onsemi

Description: Latching PWM for Cycle-By-Cycle Current Limiting; Oscillator Frequency Guaranteed at 250 kHz; Low Startup and Operating Current; Trimmed Oscillator for Precise Frequency Control; Internally Trimmed Reference with Undervoltage Lockout; Undervoltage Lockout with Hysteresis; Automatic Feed Forward Compensation; High Current Totem Pole Output; Current Mode Operation to 500 kHz; Pb-Free Packages are Available

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UC3842BD1G - onsemi PCB footprint - Small Outline Packages - Small Outline Packages - SOIC-8 NB CAST 751-07
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UC3842BD1G - onsemi  - 3D model - Small Outline Packages - SOIC-8 NB CAST 751-07
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UC3842BD1G Details

  • Manufacturer Part Number:

    UC3842BD1G

  • Brand Name:

    onsemi

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    SOIC-8 Narrow Body

  • Package Description:

    SOIC-8

  • Pin Count:

    8

  • Manufacturer Package Code:

    751-07

  • Country Of Origin:

    Philippines

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Factory Lead Time:

    4 Weeks

  • 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-G8

  • JESD-609 Code:

    e3

  • Length:

    4.9 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    8

  • Operating Temperature-Max:

    70 °C

  • Output Current-Max:

    1 A

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP8,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • 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:

    COMMERCIAL

  • Terminal Finish:

    MATTE TIN

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

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

    30

  • Width:

    3.9 mm

UC3842BD1G Frequently Asked Questions (FAQs)

  • The maximum operating frequency of the UC3842BD1G is 500 kHz.
  • Yes, the UC3842BD1G is suitable for isolated flyback converters, but it requires an external transformer and optocoupler for feedback.
  • The output voltage of the UC3842BD1G is set by the voltage divider network connected to the FB (feedback) pin. The ratio of the resistors in the divider network determines the output voltage.
  • The soft-start pin (SS) is used to slowly ramp up the output voltage during startup, reducing inrush current and preventing voltage overshoot.
  • Yes, the UC3842BD1G can be used for non-isolated converters, such as buck converters, but it requires an external voltage reference and compensation network.

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UC3842BD1G Overview

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