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UC3843BD1G - 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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UC3843BD1G - onsemi PCB footprint - Small Outline Packages - Small Outline Packages - 8 lead
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UC3843BD1G - onsemi  - 3D model - Small Outline Packages - 8 lead
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UC3843BD1G Details

  • Manufacturer Part Number:

    UC3843BD1G

  • Brand Name:

    onsemi

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Not Recommended

  • Part Package Code:

    SOIC-8 Narrow Body

  • Package Description:

    SOIC-8

  • Pin Count:

    8

  • Manufacturer Package Code:

    751-07

  • Country Of Origin:

    Mainland China

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Manufacturer:

    onsemi

  • YTEOL:

    3

  • 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 (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

UC3843BD1G Frequently Asked Questions (FAQs)

  • The recommended operating voltage range for the UC3843BD1G is 12V to 28V, with a maximum rating of 30V.
  • To ensure stable operation, ensure that the input voltage is within the recommended range, decouple the power supply with a 10uF capacitor, and use a minimum of 1kΩ pull-up resistor on the feedback pin.
  • The maximum switching frequency of the UC3843BD1G is 500kHz, but it can be adjusted using an external resistor and capacitor on the RT/CT pin.
  • The output voltage of the UC3843BD1G can be calculated using the formula: Vout = Vref x (R1 + R2) / R2, where Vref is the internal reference voltage (5V) and R1 and R2 are the feedback resistors.
  • The soft-start pin (SS) is used to slowly ramp up the output voltage during startup, reducing inrush current and preventing voltage overshoots.

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UC3843BD1G Overview

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