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UC3843AD8G4 - Texas Instruments

Description: AC to DC Switching Converter Off-Line Switcher/SMPS Controller 500kHz Tube 8-Pin SOIC

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UC3843AD8G4 Details

  • Manufacturer Part Number:

    UC3843AD8G4

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    SOIC

  • Package Description:

    GREEN, PLASTIC, SOIC-8

  • Pin Count:

    8

  • Country Of Origin:

    Mexico

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • 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:

    8.2 V

  • Input Voltage-Nom:

    15 V

  • JESD-30 Code:

    R-PDSO-G8

  • JESD-609 Code:

    e4

  • 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

  • Output Voltage-Max:

    5.1 V

  • Output Voltage-Min:

    4.9 V

  • Output Voltage-Nom:

    5 V

  • 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

  • Supply Current-Max (Isup):

    25 mA

  • Supply Voltage-Max (Vsup):

    28 V

  • Supply Voltage-Min (Vsup):

    8.4 V

  • Supply Voltage-Nom (Vsup):

    11 V

  • Surface Mount:

    YES

  • Switcher Configuration:

    BUCK-BOOST

  • Switching Frequency-Max:

    500 kHz

  • Technology:

    BIPOLAR

  • Temperature Grade:

    COMMERCIAL

  • 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):

    NOT SPECIFIED

  • Width:

    3.9 mm

UC3843AD8G4 Frequently Asked Questions (FAQs)

  • The recommended operating frequency range for the UC3843AD8G4 is 100 kHz to 500 kHz. However, it can be operated up to 1 MHz with proper design and layout considerations.
  • The values of RFB1 and RFB2 depend on the desired output voltage, input voltage, and switching frequency. A good starting point is to use a ratio of RFB1:RFB2 = 1:2.5 to 1:3.5, and then adjust the values based on the specific design requirements.
  • The soft-start pin is used to gradually ramp up the output voltage during startup, reducing inrush current and electromagnetic interference (EMI). You can connect a capacitor from the SS pin to ground, and a resistor from the SS pin to the output voltage, to create a soft-start circuit.
  • To ensure stability, follow proper layout and grounding techniques, use a low-ESR input capacitor, and add a 1-10 nF capacitor across the VCC pin to ground. Additionally, make sure the feedback network is properly designed and the output voltage is adequately filtered.
  • The maximum ratings for the input voltage (VIN) is 15 V, and the maximum output current (IOUT) is 1 A. Do not exceed these ratings to prevent damage to the device.

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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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