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UC3841N - Texas Instruments

Description: Texas Instruments UC3841N, PWM Current Mode Controller, 1 A, 500 kHz 18-Pin PDIP

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UC3841N - Texas Instruments PCB footprint - Dual-In-Line Packages - Dual-In-Line Packages - N(R-PDIP-T18)
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UC3841N - Texas Instruments  - 3D model - Dual-In-Line Packages - N(R-PDIP-T18)
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UC3841N Details

  • Manufacturer Part Number:

    UC3841N

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Not Recommended

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.90

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    15

  • Additional Feature:

    CURRENT MODE OPERATION IS ALSO POSSIBLE

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    32 V

  • Input Voltage-Min:

    8 V

  • Input Voltage-Nom:

    20 V

  • JESD-30 Code:

    R-PDIP-T18

  • JESD-609 Code:

    e4

  • Length:

    22.48 mm

  • Number of Functions:

    1

  • Number of Terminals:

    18

  • Operating Temperature-Max:

    70 °C

  • Output Current-Max:

    1 A

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    DIP

  • Package Equivalence Code:

    DIP18,.3

  • Package Shape:

    RECTANGULAR

  • Package Style:

    IN-LINE

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    5.08 mm

  • Supply Current-Max (Isup):

    14 mA

  • Supply Voltage-Max (Vsup):

    32 V

  • Supply Voltage-Min (Vsup):

    8.4 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

UC3841N Frequently Asked Questions (FAQs)

  • The maximum voltage rating of the UC3841N is 30V. However, it's recommended to operate it within 15V to ensure reliable operation.
  • The frequency of the UC3841N can be calculated using the formula: f = 1.44 / (RT * CT), where RT is the resistance of the timing resistor and CT is the capacitance of the timing capacitor.
  • The soft-start pin (SS) is used to slowly ramp up the output voltage of the converter during startup, reducing inrush currents and preventing voltage overshoots.
  • Yes, the UC3841N can be used for isolated topologies like flyback converters. However, additional components like optocouplers and transformers are required to provide isolation between the input and output stages.
  • The UC3841N's voltage feedback loop can be compensated using a type II or type III compensator network, which involves adding resistors and capacitors to the feedback loop to achieve stability and desired transient response.

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UC3841N 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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Image Part Number Model
Part Image UC3841NG4 Texas Instruments

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BICMOS, PDIP18