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UC3842N - Texas Instruments

Description: Texas Instruments UC3842N, PWM Current Mode Controller, 1 A, 500 kHz 8-Pin PDIP

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UC3842N - Texas Instruments - PCB symbol
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PCB Footprints
UC3842N - Texas Instruments PCB footprint - Dual-In-Line Packages - Dual-In-Line Packages - 8-DIP (0.300", 7.62mm)
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UC3842N - Texas Instruments - 3D model - Dual-In-Line Packages - 8-DIP (0.300", 7.62mm)
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UC3842N Details

  • Manufacturer Part Number:

    UC3842N

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    DIP

  • Pin Count:

    8

  • Country Of Origin:

    Mexico

  • 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:

    28 V

  • Input Voltage-Min:

    11.5 V

  • Input Voltage-Nom:

    15 V

  • JESD-30 Code:

    R-PDIP-T8

  • JESD-609 Code:

    e4

  • Length:

    9.59 mm

  • Number of Functions:

    1

  • Number of Terminals:

    8

  • Operating Temperature-Max:

    70 °C

  • Output Current-Max:

    1 A

  • Output Voltage-Nom:

    5 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    DIP

  • Package Equivalence Code:

    DIP8,.3

  • Package Shape:

    RECTANGULAR

  • Package Style:

    IN-LINE

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    5.08 mm

  • Supply Current-Max (Isup):

    25 mA

  • Supply Voltage-Max (Vsup):

    28 V

  • Supply Voltage-Min (Vsup):

    16 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:

    7.62 mm

UC3842N Frequently Asked Questions (FAQs)

  • The maximum operating frequency of UC3842N 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) = Vcc + 2.5V and Vin(max) = 35V to calculate the minimum and maximum input voltage.
  • The soft-start pin (SS) is used to slowly ramp up the output voltage during startup, reducing the inrush current and preventing voltage spikes. It's recommended to connect a capacitor between the SS pin and ground to set the soft-start time.
  • The values of RT and CT determine the oscillator frequency. A higher value of RT and a lower value of CT result in a higher frequency. Use the formula: f = 1.44 / (RT * CT) to calculate the oscillator frequency. Typically, RT is in the range of 1kΩ to 10kΩ, and CT is in the range of 100pF to 1000pF.
  • The undervoltage lockout (UVLO) is a protection feature that prevents the IC from operating below a certain voltage threshold (typically 7.9V). This ensures that the IC operates within its specified voltage range and prevents damage due to low input voltage.

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UC3842N 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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For a full list of alternate parts for UC3842N, check out Findchips.com