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LT3791MPFE#PBF - Analog Devices

Description: LED Lighting Drivers 4 Switch Buck-Boost LED Driver Controller

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LT3791MPFE#PBF - Analog Devices - PCB symbol
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LT3791MPFE#PBF - Analog Devices PCB footprint - Small Outline Packages - Small Outline Packages - FE Package Package Variation: FE38 (31) 38-Lead Plastic TSSOP (4.4mm)
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LT3791MPFE#PBF - Analog Devices - 3D model - Small Outline Packages - FE Package Package Variation: FE38 (31) 38-Lead Plastic TSSOP (4.4mm)
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LT3791MPFE#PBF Details

  • Manufacturer Part Number:

    LT3791MPFE#PBF

  • Brand Name:

    Analog Devices Inc

  • Pbfree Code:

    No

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    LEAD FREE, PLASTIC, TSSOP-38

  • Pin Count:

    38

  • Manufacturer Package Code:

    05-08-1772

  • Country Of Origin:

    Thailand

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Manufacturer:

    Analog Devices Inc

  • YTEOL:

    10

  • Interface IC Type:

    LED DISPLAY DRIVER

  • JESD-30 Code:

    R-PDSO-G38

  • JESD-609 Code:

    e3

  • Length:

    9.7 mm

  • Moisture Sensitivity Level:

    1

  • Multiplexed Display Capability:

    NO

  • Number of Functions:

    1

  • Number of Segments:

    9

  • Number of Terminals:

    38

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    HTSSOP

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH

  • Peak Reflow Temperature (Cel):

    260

  • Seated Height-Max:

    1.2 mm

  • Supply Voltage-Max:

    60 V

  • Supply Voltage-Min:

    4.7 V

  • Supply Voltage-Nom:

    12 V

  • Surface Mount:

    YES

  • Technology:

    BIPOLAR

  • Terminal Finish:

    Matte Tin (Sn)

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    0.5 mm

  • Terminal Position:

    DUAL

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

    30

  • Width:

    4.4 mm

LT3791MPFE#PBF Frequently Asked Questions (FAQs)

  • A good PCB layout for the LT3791 involves keeping the high-frequency switching nodes (e.g., SW and VIN) away from sensitive analog nodes, using a solid ground plane, and minimizing trace lengths and widths to reduce parasitic inductance and capacitance. A 4-layer PCB with a dedicated power plane and a solid ground plane is recommended.
  • When selecting an inductor for the LT3791, consider the inductor's saturation current, DC resistance, and core material. The inductor should be able to handle the peak current of the converter, and its DC resistance should be low to minimize losses. Ferrite or iron powder cores are recommended. The datasheet provides a list of recommended inductors.
  • The maximum ambient temperature for the LT3791 is 125°C. However, the device's junction temperature (TJ) should not exceed 150°C. The datasheet provides a thermal derating curve to help designers estimate the maximum ambient temperature for their specific application.
  • Yes, the LT3791 is qualified for automotive and high-reliability applications. It meets the AEC-Q100 standard for automotive-grade ICs and is manufactured using a high-reliability process. However, designers should ensure that their specific application meets the required reliability and qualification standards.
  • Common issues with the LT3791 can often be traced back to poor PCB layout, incorrect component selection, or inadequate decoupling. Check the datasheet for recommended layout guidelines and component selection. Ensure that the input and output capacitors are properly decoupled, and that the feedback network is correctly configured. Use an oscilloscope to observe the switching waveforms and identify any signs of oscillation or instability.

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LT3791MPFE#PBF Overview

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About Analog Devices

Analog Devices Inc. is a global leader in the design and manufacturing of analog, mixed-signal, and digital signal processing integrated circuits and software solutions for the industrial, automotive, healthcare, communications industries. Analog Devices serves a diverse range of markets including industrial, automotive, healthcare, energy, aerospace, defense, and consumer electronics industries. Analog Devices’ product portfolio includes a wide range of ICs, modules, and subsystems.

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