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MAX9741 - Class D Amplifier

Description

The MAX9741 stereo Class D audio power amplifier provides Class AB amplifier performance with Class D efficiency, conserving board space and eliminating the need for a bulky heatsink.

Using a Class D architecture, it delivers 12W continuous output power into 8Ω loads.

Features

  • high 80dB PSRR, low 0.07% THD+N, and SNR in excess of 100dB. Short-circuit and thermal-overload protection prevent the device from being damaged during a fault condition. The MAX9741 is available in a 56-pin TQFN (8mm x 8mm x 0.8mm) package. The MAX9741 is specified over the extended -40°C to +85°C temperature range.
  • Filterless Class D Amplifier.
  • Unique Spread-Spectrum Mode Offers 5dB Emissions Improvement Over Conventional Methods.
  • Up to 88% Efficient into 16Ω.

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Full PDF Text Transcription

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XX-XXXX; Rev 0; 10/05 12W+12W, Filterless, Spread-Spectrum, Stereo, Class D Amplifier General Description The MAX9741 stereo Class D audio power amplifier provides Class AB amplifier performance with Class D efficiency, conserving board space and eliminating the need for a bulky heatsink. Using a Class D architecture, it delivers 12W continuous output power into 8Ω loads. Proprietary and patent-protected modulation and switching schemes render the traditional Class D EMI suppression output filter unnecessary. The MAX9741 offers two modulation schemes: a fixedfrequency mode (FFM), and a spread-spectrum mode (SSM) that reduces EMI-radiated emissions due to the modulation frequency.
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