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UC3846DW - Texas Instruments

Description: Switching Controllers Current-Mode PWM Con troller

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UC3846DW Details

  • Manufacturer Part Number:

    UC3846DW

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    SOIC

  • Pin Count:

    16

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.90

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    15

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    40 V

  • Input Voltage-Min:

    7.25 V

  • Input Voltage-Nom:

    15 V

  • JESD-30 Code:

    R-PDSO-G16

  • JESD-609 Code:

    e4

  • Length:

    10.3 mm

  • Moisture Sensitivity Level:

    2

  • Number of Functions:

    1

  • Number of Terminals:

    16

  • Operating Temperature-Max:

    70 °C

  • Output Current-Max:

    0.5 A

  • Output Voltage-Max:

    5.2 V

  • Output Voltage-Min:

    5 V

  • Output Voltage-Nom:

    5.1 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP16,.4

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    2.65 mm

  • Supply Current-Max (Isup):

    21 mA

  • Supply Voltage-Max (Vsup):

    40 V

  • Supply Voltage-Min (Vsup):

    7.7 V

  • Surface Mount:

    YES

  • Switcher Configuration:

    BUCK-BOOST

  • Switching Frequency-Max:

    500 kHz

  • Technology:

    BICMOS

  • 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):

    30

  • Width:

    7.5 mm

UC3846DW Frequently Asked Questions (FAQs)

  • The maximum operating frequency of UC3846DW is 500 kHz. However, it's recommended to operate it at a frequency between 100 kHz to 400 kHz for optimal performance.
  • The minimum input voltage is typically 8.5V, and the maximum input voltage is 35V. However, it's recommended to operate it between 12V to 25V for optimal performance. You can use the formula: Vin(min) = 2.5V + (Vout / R1) * R2, where 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. It's recommended to connect a capacitor (typically 10nF to 100nF) between the SS pin and ground to set the soft-start time.
  • The feedback resistors (R1 and R2) set the output voltage of the converter. A common ratio for R1 and R2 is 1:2 or 1:3. You can use the formula: R1 = R2 * (Vout - Vref) / Vref, where Vref is the internal reference voltage (typically 2.5V).
  • The undervoltage lockout (UVLO) is a protection feature that prevents the IC from operating below a certain input voltage (typically 8.5V). This ensures that the IC operates within its specified voltage range and prevents damage or malfunction.

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UC3846DW Overview

Use the download button to access the UC3846DW 3D model. You can still request or build the schematic symbol and PCB footprint by using the respective build or request forms on this page.
To find more CAD model downloads similar to this part, try a partial part number search, like UC384, or try a keyword search, such as Switching Regulator or Controllers

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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For a full list of alternate parts for UC3846DW, check out Findchips.com