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LM4991LDX

LM4991LDX Description

3W Audio Power Amplifier with Shutdown Mode

LM4991LDX Categories

Audio Power Amplifiers

LM4991LDX Manufacturer

National Semiconductor

LM4991LDX Datasheet (PDF)

LM4991LDX Datasheet

LM4991LDX Price & Availability


Check LM4991LDX Price & Availability at Canics

LM4991LDX Features

  • Available in space-saving LLP and MA packages
  • Ultra low current shutdown mode
  • Can drive capacitive loads up to 500pF
  • Improved pop & click circuitry reduces noises during turn-on and turn-off transitions
  • 2.2 - 5.5V operation
  • No output coupling capacitors, snubber networks, bootstrap capacitors or gain-setting resistors required
  • Unity-gain stable

LM4991LDX Description

    The LM4991 is a mono bridged audio power amplifier capable of delivering 3W of continuous average power into a 3 load with less than 10% THD when powered by a 5V power supply . To conserve power in portable applications, the LM4991's micropower shutdown mode (ISD = 0.1ľA, typ) is activated when VDD is applied to the SHUTDOWN pin.

    Boomer audio power amplifiers are designed specifically to provide high power, high fidelity audio output. They require few external components and operate on low supply voltages from 2.2V to 5.5V. Since the LM4991 does not require output coupling capacitors, bootstrap capacitors, or snubber networks, it is ideally suited for low-power portable systems that require minimum volume and weight.

    Additional LM4991 features include thermal shutdown protection, unity-gain stability, and external gain set.

    LM4991LDX Parameters

    StatusFull production
    PackageLLP
    Temperature Min (deg C)-40
    Temperature Max (deg C)85
    Pins8
    Pricing$0.50
    Channels (Channels)1
    PSRR (dB)Vripple=0.2V sine p-p, input terminated with 10ohms, f=1kHz
    THD (%)Po=0.5W, f=1kHz
    User Supply (Volt)5
    Supply Range+2.2 - +5.5 V
    PowerAtFourOhms OnePercentTHD (Watt)2.10
    PowerAtEightOhms OnePercentTHD (Watt)1.10
    PowerAtFourOhms TenPercentTHD (Watt)2.50
    PowerAtEightOhms TenPercentTHD (Watt)1.50
    SNR Conditions64
    PSRR Conditions.20
    THD ConditionsNo
    Select parameters and click to see components with these parameters.

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