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UC3842NG4 - Texas Instruments

Description: TEXAS INSTRUMENTS - UC3842NG4 - 电流模式PWM控制器, 12V-25V电源, 450kHz, 13.5V/200mA输出, DIP-8

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UC3842NG4 - Texas Instruments - PCB symbol
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PCB Footprints
UC3842NG4 - Texas Instruments PCB footprint - Dual-In-Line Packages - Dual-In-Line Packages - P (R-PDIP-T8)
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UC3842NG4 - Texas Instruments - 3D model - Dual-In-Line Packages - P (R-PDIP-T8)
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UC3842NG4 Details

  • Manufacturer Part Number:

    UC3842NG4

  • 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:

    8542.39.00.60

  • 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

UC3842NG4 Frequently Asked Questions (FAQs)

  • The maximum operating frequency of UC3842NG4 is 500 kHz. However, it's recommended to operate at a frequency below 400 kHz for optimal performance and to minimize power losses.
  • The values of RT and CT can be calculated using the formulas provided in the datasheet. A good starting point is to use RT = 10 kΩ and CT = 3.3 nF, and then adjust them based on the desired oscillator frequency and stability.
  • 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 (typically 10 nF to 100 nF) from the SS pin to ground, and a resistor (typically 1 kΩ to 10 kΩ) from the SS pin to the output voltage.
  • To ensure stability, follow the layout guidelines in the datasheet, use a low-ESR output capacitor, and add a small capacitor (typically 10 nF to 100 nF) from the output to ground. Also, ensure that the input voltage is well-regulated and the output voltage is properly filtered.
  • The UC3842NG4 is designed to handle output currents up to 1 A. However, the actual output current capability depends on the specific application, PCB layout, and thermal management. It's essential to ensure proper heat sinking and thermal design to prevent overheating.

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UC3842NG4 Overview

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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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