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UC3845AD8 - Texas Instruments

Description: TEXAS INSTRUMENTS - UC3845AD8 . - PWM Controller, 25V-12V supply, 500 kHz, 5V/200mA out, SOIC-8

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UC3845AD8 - Texas Instruments PCB footprint - Small Outline Packages - Small Outline Packages - D0008A
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UC3845AD8 Details

  • Manufacturer Part Number:

    UC3845AD8

  • Brand Name:

    Texas Instruments

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    SOIC

  • Pin Count:

    8

  • Country Of Origin:

    Mexico

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    0

  • 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-PDSO-G8

  • JESD-609 Code:

    e4

  • Length:

    4.9 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    8

  • Operating Temperature-Max:

    70 °C

  • Output Current-Max:

    1 A

  • Output Voltage-Max:

    5.1 V

  • Output Voltage-Min:

    4.9 V

  • Output Voltage-Nom:

    5 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP8,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    1.75 mm

  • Supply Current-Max (Isup):

    25 mA

  • Supply Voltage-Max (Vsup):

    28 V

  • Supply Voltage-Min (Vsup):

    8.4 V

  • Supply Voltage-Nom (Vsup):

    11 V

  • Surface Mount:

    YES

  • Switcher Configuration:

    BUCK-BOOST

  • Switching Frequency-Max:

    500 kHz

  • Technology:

    BIPOLAR

  • Temperature Grade:

    COMMERCIAL

  • Terminal Finish:

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

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

  • Time@Peak Reflow Temperature-Max (s):

    30

  • Width:

    3.9 mm

UC3845AD8 Frequently Asked Questions (FAQs)

  • The UC3845AD8 can operate up to 500 kHz, but the recommended operating frequency is up to 400 kHz for optimal performance.
  • To ensure stable operation, make sure to decouple the VCC pin with a 10uF capacitor, use a low-ESR output capacitor, and keep the layout clean and compact to minimize noise and parasitic inductance.
  • The soft-start pin (SS) is used to slowly ramp up the output voltage during startup, reducing inrush current and preventing voltage overshoot. It can be connected to a capacitor to ground to set the soft-start time.
  • The output voltage of the UC3845AD8 can be adjusted by changing the ratio of the resistors in the feedback network (R1 and R2) connected to the FB pin. The output voltage is determined by the equation: Vout = 2.5 x (1 + R2/R1).
  • The UC3845AD8 can handle a maximum current of 1A, but the actual current rating depends on the specific application and the thermal design of the system.

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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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