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UC2843BD1R2G - 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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UC2843BD1R2G - onsemi PCB footprint - Small Outline Packages - Small Outline Packages - SOIC-8 NB CAST 751-07
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UC2843BD1R2G - onsemi  - 3D model - Small Outline Packages - SOIC-8 NB CAST 751-07
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UC2843BD1R2G Details

  • Manufacturer Part Number:

    UC2843BD1R2G

  • Brand Name:

    onsemi

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • 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:

    7.6

  • 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:

    85 °C

  • Operating Temperature-Min:

    -25 °C

  • Output Current-Max:

    1 A

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    TSOP8,.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:

    OTHER

  • 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

UC2843BD1R2G Frequently Asked Questions (FAQs)

  • A good PCB layout for the UC2843BD1R2G involves keeping the input and output stages separate, using a star-ground configuration, and placing the IC close to the input capacitors. Additionally, using a ground plane and shielding can help reduce EMI.
  • Choose input capacitors with low ESR and high ripple current rating. For output capacitors, select ones with low ESR and high capacitance. The datasheet recommends a minimum capacitance of 10uF for the input and output capacitors.
  • The UC2843BD1R2G can operate in an ambient temperature range of -40°C to +125°C. However, the junction temperature should not exceed 150°C.
  • The maximum output current of the UC2843BD1R2G depends on the input voltage, output voltage, and the inductor value. Use the formula: Iout(max) = (Vin - Vout) / (Rds(on) * L) to calculate the maximum output current.
  • The bootstrap capacitor is used to generate the gate drive voltage for the high-side MOSFET. It is charged through the internal diode and discharged through the high-side MOSFET, allowing the IC to drive the MOSFET.

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UC2843BD1R2G Overview

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Part Image UC2843BD1G onsemi

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8