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UC3845AJ - Texas Instruments

Description: Current Mode PWM Controller 200mA 500kHz 8-Pin CDIP Tube

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UC3845AJ - Texas Instruments PCB footprint - Ceramic Dual-In-Line Packages - Ceramic Dual-In-Line Packages - JG (R-GDIP-T8),
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UC3845AJ - Texas Instruments  - 3D model - Ceramic Dual-In-Line Packages - JG (R-GDIP-T8),
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UC3845AJ Details

  • Manufacturer Part Number:

    UC3845AJ

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    DIP

  • Pin Count:

    8

  • 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:

    8.2 V

  • Input Voltage-Nom:

    15 V

  • JESD-30 Code:

    R-GDIP-T8

  • JESD-609 Code:

    e0

  • Length:

    9.58 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:

    CERAMIC, GLASS-SEALED

  • 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):

    8.4 V

  • Surface Mount:

    NO

  • Switcher Configuration:

    BUCK-BOOST

  • Switching Frequency-Max:

    500 kHz

  • Technology:

    BICMOS

  • Temperature Grade:

    COMMERCIAL

  • Terminal Finish:

    Tin/Lead (Sn/Pb)

  • Terminal Form:

    THROUGH-HOLE

  • Terminal Pitch:

    2.54 mm

  • Terminal Position:

    DUAL

  • Width:

    7.62 mm

UC3845AJ Frequently Asked Questions (FAQs)

  • The recommended operating voltage range for UC3845AJ is 12V to 28V, with a maximum rating of 30V.
  • The maximum duty cycle for UC3845AJ can be calculated using the formula: Dmax = (Vout - Vin) / (Vout - Vsat), where Vout is the output voltage, Vin is the input voltage, and Vsat is the saturation voltage of the internal switch.
  • The soft-start pin (SS) on UC3845AJ is used to control the startup of the converter. By connecting a capacitor to this pin, the output voltage can be slowly ramped up to the desired level, reducing inrush current and electromagnetic interference (EMI).
  • The value of the current sense resistor (Rcs) in UC3845AJ depends on the desired current limit and the voltage drop across the resistor. A general rule of thumb is to choose a value that results in a voltage drop of around 1V at the maximum current limit.
  • The maximum switching frequency for UC3845AJ is 500 kHz, but it can be adjusted using an external resistor and capacitor connected to the RT pin.

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UC3845AJ 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 UC2845J Texas Instruments

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