The MAX9736A/MAX9736B filterless, stereo Class D audio power amplifiers offer Class AB performance and Class D efficiency with minimal board space. The MAX9736A outputs 2x15W in stereo mode and 30W in mono mode. The MAX9736B outputs 2x6W in stereo mode and 12W in mono mode. These devices operate from an 8V to 28V supply range. The MAX9736 features a filterless, spread-spectrum switching mode (MOD = high) or a classic PWM fixedfrequency switching mode (MOD = low). The MAX9736 features externally set gain and a lowpower shutdown mode that reduces supply current to less than 1μA. Comprehensive click-and-pop circuitry minimizes noise into and out of shutdown or mute.

The MAX9736 features two output modulation schemes, filterless modulation (MOD = high) or classic PWM (MOD = low). Maxim’s unique, filterless modulation scheme eliminates the LC filter required by traditional Class D amplifiers, reducing component count, conserving board space, and reducing system cost. Configure for classic PWM output when using a full LC filter.

The MAX9736 features a unique, patented spread-spectrum mode that flattens the wideband spectral components, improving EMI radiated by the speaker and cables. The switching frequency of the Class D amplifier varies randomly by ±6kHz around the 300kHz center frequency. Instead of a large amount of spectral energy present at multiples of the switching frequency, the energy is spread over a bandwidth that increases with frequency.

Read more: http://datasheets.maxim-ic.com/en/ds/MAX9736-MAX9736B.pdf