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IT4992 － 2.3-Watt Low Noise Stereo Audio Power Amplifier

Description

The IT4992 is a dual bridge-connected audio power amplifiers, capable of delivering 1.35W of continuous average power to an 8 BTL with less than 1% distortion (THD+N) from a 5.0V power supply, and 320mW to an 8 BTL load from a 2.6V power supply. For the low current consumption applications, the SHDNB mode is supported to disable the IT4992 when it is idle. The current consumption can be further reduced to below 0.1uA.

The IT4992 contains over temperature protection, preventing IT4992 from damages of temperature. For maximum flexibility, the IT4992 provides an externally controlled gain (with resistors), as well as an externally controlled turnon time (with the bypass capacitor). The IT4992 is available in a 3mm×3mm QFN-16 package.

　

Features

  • 2.3V-5.5V operation range

  • Output power

    • 2.3 W into 4Ω at 5V Supply at THD=10% (Typ.)

    1.35 W into 8Ω at 5V Supply at THD=1% (Typ.)

    450 mW into 8Ω at 3V Supply at THD=1% (Typ.)

    320 mW into 8Ω at 2.6V Supply at THD=1% (Typ.)

  • Low quiescent current

    • 7mA Typical at VDD=5V

    Shutdown current < 0.1uA

  • High signaltonoise ratio performance

    • Po=1W, f=1KHz, SNR=101 dB (Aweighting) at VDD=5V

  • Ultra low noise (12u Vrms, Aweighting) and output offset voltage

  • Thermal shutdown protection

  • No output coupling capacitors, snubber networks or bootstrap capacitors required

  • Unity-gain stable

  • External gain configuration capability

　

　

Technology Information:

  Data Sheet

  Package: QFN-16

                       

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