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L4985A - STMicroelectronics

Description: CCM PFC controller with High Voltage start-up

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L4985A - STMicroelectronics - PCB symbol
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L4985A - STMicroelectronics PCB footprint - Small Outline Packages - Small Outline Packages - SO-8_ 2021-1
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L4985A - STMicroelectronics - 3D model - Small Outline Packages - SO-8_ 2021-1
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L4985A Details

  • Manufacturer Part Number:

    L4985A

  • Brand Name:

    STMicroelectronics

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    SOP-8

  • Country Of Origin:

    Mainland China

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Factory Lead Time:

    25 Weeks

  • Manufacturer:

    STMicroelectronics

  • YTEOL:

    7

  • Analog IC - Other Type:

    POWER FACTOR CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    24.5 V

  • Input Voltage-Min:

    10 V

  • Input Voltage-Nom:

    15 V

  • JESD-30 Code:

    R-PDSO-G8

  • Length:

    4.9 mm

  • Number of Functions:

    1

  • Number of Terminals:

    8

  • Operating Temperature-Max:

    125 °C

  • Operating Temperature-Min:

    -25 °C

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP8,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Seated Height-Max:

    1.75 mm

  • Supply Current-Max (Isup):

    4.7 mA

  • Surface Mount:

    YES

  • Switcher Configuration:

    BOOST

  • Switching Frequency-Max:

    71 kHz

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

  • Width:

    3.9 mm

L4985A Frequently Asked Questions (FAQs)

  • The maximum input voltage that can be applied to the L4985A is 30V, but it's recommended to keep it below 28V for reliable operation.
  • The output voltage of the L4985A can be calculated using the formula: Vout = Vref x (1 + R2/R1), where Vref is the internal reference voltage (2.5V), R1 and R2 are the resistors connected to the FB pin.
  • The bootstrap capacitor (CBOOT) is used to provide a high-voltage supply to the internal high-side driver of the L4985A, allowing it to drive the power MOSFET.
  • The output inductor value depends on the output current, switching frequency, and output voltage ripple requirements. A general rule of thumb is to choose an inductor with a value between 1-10uH, and then adjust it based on the specific application requirements.
  • The maximum output current that the L4985A can deliver depends on the input voltage, output voltage, and the external power MOSFET used. Typically, it can deliver up to 5A, but it's recommended to check the power MOSFET's datasheet for its current rating.

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L4985A Overview

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About STMicroelectronics

STMicroelectronics (ST) is a global semiconductor company that designs, manufactures, and markets a broad range of integrated circuits (ICs), discrete devices, and other electronic components. STMicroelectronics offers a diverse portfolio of semiconductor products covering a wide range of applications and industries. Their product categories include microcontrollers, analog and mixed-signal ICs, MEMS (Micro-Electro-Mechanical Systems) sensors, power management ICs, RF (Radio Frequency) transceivers, aut

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