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UC3846N - Texas Instruments

Description: Current Mode PWM Controller, UC3846N

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UC3846N - Texas Instruments PCB footprint - Dual-In-Line Packages - Dual-In-Line Packages - 16 pdip n
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UC3846N - Texas Instruments  - 3D model - Dual-In-Line Packages - 16 pdip n
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UC3846N Details

  • Manufacturer Part Number:

    UC3846N

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Not Recommended

  • Part Package Code:

    DIP

  • Pin Count:

    16

  • Country Of Origin:

    Malaysia

  • 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-PDIP-T16

  • JESD-609 Code:

    e4

  • Length:

    19.3 mm

  • 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:

    DIP

  • Package Equivalence Code:

    DIP16,.3

  • Package Shape:

    RECTANGULAR

  • Package Style:

    IN-LINE

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    3.9 mm

  • Supply Current-Max (Isup):

    21 mA

  • Supply Voltage-Max (Vsup):

    40 V

  • Supply Voltage-Min (Vsup):

    7.7 V

  • Supply Voltage-Nom (Vsup):

    15 V

  • Surface Mount:

    NO

  • Switcher Configuration:

    BUCK-BOOST

  • Switching Frequency-Max:

    500 kHz

  • Technology:

    BICMOS

  • Temperature Grade:

    COMMERCIAL

  • Terminal Finish:

    Nickel/Palladium/Gold (Ni/Pd/Au)

  • Terminal Form:

    THROUGH-HOLE

  • Terminal Pitch:

    2.54 mm

  • Terminal Position:

    DUAL

  • Width:

    6.35 mm

UC3846N Frequently Asked Questions (FAQs)

  • The maximum voltage rating of the UC3846N is 42V, but it's recommended to operate it at a maximum voltage of 35V to ensure reliable operation.
  • The oscillator circuit resistor values (Rt and Ct) depend on the desired switching frequency. A good starting point is to use the values recommended in the datasheet, and then adjust them based on the specific application requirements.
  • The soft-start pin (SS) is used to gradually increase the output voltage during startup, reducing inrush currents and electromagnetic interference (EMI). Connect a capacitor from the SS pin to ground, and the IC will slowly ramp up the output voltage during startup.
  • To ensure stability, make sure to decouple the power supply pins (VCC and GND) with a 10uF capacitor, and use a low-ESR output capacitor. Also, avoid using long traces and minimize the loop area of the switching node to reduce parasitic inductance.
  • The UC3846N can handle a maximum output current of 1.5A, but it's recommended to derate the current to ensure reliable operation. The actual current rating depends on the specific application and thermal considerations.

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UC3846N Overview

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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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Part Image UC3846J Texas Instruments

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