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LM4991MA - Texas Instruments

Description: 3.9mm LM4991MA, Audio Amplifier Class-AB mono +85°C 8-Pin SOIC

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LM4991MA - Texas Instruments - PCB symbol
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PCB Footprints
LM4991MA - Texas Instruments PCB footprint - Small Outline Packages - Small Outline Packages - D0008A height 1.75
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3D Models
LM4991MA - Texas Instruments - 3D model - Small Outline Packages - D0008A height 1.75
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LM4991MA Details

  • Manufacturer Part Number:

    LM4991MA

  • Pbfree Code:

    No

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    SOIC

  • Package Description:

    SO-8

  • Pin Count:

    8

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.33.00.01

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    0

  • Bandwidth-Nom:

    20 kHz

  • Consumer IC Type:

    AUDIO AMPLIFIER

  • JESD-30 Code:

    R-PDSO-G8

  • JESD-609 Code:

    e0

  • Length:

    4.9 mm

  • Moisture Sensitivity Level:

    1

  • Number of Channels:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    8

  • Operating Temperature-Max:

    85 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Power-Nom:

    1.5 W

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP8,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Peak Reflow Temperature (Cel):

    235

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    1.753 mm

  • Supply Current-Max:

    10 mA

  • Supply Voltage-Max (Vsup):

    5.5 V

  • Supply Voltage-Min (Vsup):

    2.2 V

  • Surface Mount:

    YES

  • Temperature Grade:

    INDUSTRIAL

  • Terminal Finish:

    TIN LEAD

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

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

    20

  • Width:

    3.9 mm

LM4991MA Frequently Asked Questions (FAQs)

  • A good PCB layout for the LM4991MA involves keeping the input and output capacitors close to the device, using a solid ground plane, and minimizing the length of the traces between the device and the capacitors. TI provides a recommended PCB layout in the datasheet and in application notes.
  • To ensure stability, make sure to use the recommended output capacitor value and type, and keep the output capacitor close to the device. Also, ensure that the input capacitor is properly decoupled and the input voltage is well-regulated. Additionally, avoid using long traces or wires between the device and the capacitors.
  • The LM4991MA can handle input voltages up to 12V, but it's recommended to keep the input voltage below 10V to ensure optimal performance and to prevent overheating.
  • The LM4991MA is rated for operation up to 125°C, but its performance may degrade at high temperatures. It's recommended to derate the output current and ensure good thermal management to prevent overheating.
  • The output voltage ripple of the LM4991MA can be calculated using the formula: ΔVout = (Iout * ESL) / (Cout * fsw), where ESL is the equivalent series inductance of the output capacitor, Cout is the output capacitance, and fsw is the switching frequency.

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LM4991MA 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 LM4991MA/NOPB National Semiconductor Corporation

Audio Amplifier, 1.5W, 1 Channel(s), 1 Func, PDSO8