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MAX9746 - Class D Audio Amplifier

Description

The MAX9746 mono Class D audio power amplifier provides Class AB amplifier performance with Class D efficiency, conserving board space and extending battery life.

The MAX9746 is designed specifically for systems using 1.8V logic interface.

Features

  • high 72dB PSRR, a low 0.1% THD+N, and SNR in excess of 90dB. Short-circuit and thermal-overload protection prevent the device from damage during a fault condition. The MAX9746 is available in a 12-bump UCSP™ (1.5mm ✕ 2mm ✕ 0.6mm) package. The MAX9746 is specified over the extended -40°C to +85°C temperature range. Features.
  • Filterless Amplifier Passes FCC Radiated Emissions Standards with 100mm of Cable.
  • Unique Spread-Spectrum Mode Offers 5dB Emissions Improvement Over Convent.

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Full PDF Text Transcription

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19-0515; Rev 0; 5/06 1.2W, Low-EMI, Filterless, Class D Audio Amplifier General Description The MAX9746 mono Class D audio power amplifier provides Class AB amplifier performance with Class D efficiency, conserving board space and extending battery life. The MAX9746 is designed specifically for systems using 1.8V logic interface. Using a Class D architecture, the MAX9746 delivers 1.2W into an 8Ω load while offering efficiencies near 90%. A low-EMI modulation scheme renders the traditional Class D output filter unnecessary. The MAX9746 offers two modulation schemes: a fixedfrequency (FFM) mode, and a spread-spectrum (SSM) mode that reduces EMI-radiated emissions due to the modulation frequency.
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