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UC2841N - Texas Instruments

Description: Programmable, Off-Line, PWM Controller

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Symbol
UC2841N - Texas Instruments - PCB symbol
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PCB Footprints
UC2841N - Texas Instruments PCB footprint - Dual-In-Line Packages - Dual-In-Line Packages - N(R-PDIP-T18)
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UC2841N - Texas Instruments - 3D model - Dual-In-Line Packages - N(R-PDIP-T18)
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UC2841N Details

  • Manufacturer Part Number:

    UC2841N

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Not Recommended

  • Part Package Code:

    DIP

  • Pin Count:

    18

  • 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:

    85 °C

  • Operating Temperature-Min:

    -20 °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 V

  • Surface Mount:

    NO

  • Switcher Configuration:

    BUCK-BOOST

  • Switching Frequency-Max:

    500 kHz

  • Technology:

    BICMOS

  • Temperature Grade:

    OTHER

  • Terminal Finish:

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

  • Terminal Form:

    THROUGH-HOLE

  • Terminal Pitch:

    2.54 mm

  • Terminal Position:

    DUAL

  • Width:

    7.62 mm

UC2841N Frequently Asked Questions (FAQs)

  • The recommended operating frequency range for UC2841N is 100 kHz to 500 kHz. However, it can operate up to 1 MHz with some performance degradation.
  • The value of CT depends on the desired oscillator frequency and the values of RT and RB. A good starting point is to use the formula: CT = (RT * RB) / (1.44 * fosc), where fosc is the desired oscillator frequency.
  • The soft-start pin (SS) is used to slowly ramp up the output voltage during startup, reducing inrush current and stress on the power supply. To use it, connect a capacitor from SS to ground and a resistor from SS to VCC. The capacitor value determines the soft-start time.
  • To ensure stability, make sure the oscillator circuit is properly biased, the timing capacitor (CT) is correctly sized, and the feedback loop is stable. Also, check for proper decoupling of the power supply and ensure that the output voltage is within the recommended range.
  • Yes, the UC2841N can be used in a push-pull configuration. To do so, connect the outputs of two UC2841N devices in a push-pull configuration, with the outputs connected to the primary winding of a transformer. This configuration can improve efficiency and reduce EMI.

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UC2841N 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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