12W+12W, Low-EMI, Spread-Spectrum, Stereo, Class D Amplifier

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, the MAX9741 delivers 12W continuous output power into 8Ω loads. Modulation and switching schemes render the traditional Class D EMI suppression output filter unnecessary.

The MAX9741 offers two modulation schemes: a fixed-frequency mode (FFM), and a spread-spectrum mode (SSM) that reduces EMI-radiated emissions due to the modulation frequency. The device utilizes a fully differential architecture, a full bridged output, and offers comprehensive click-and-pop suppression.

The MAX9741 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.

Applications

* Automotive * Desktop PCs * LCD Monitors * LCD Projectors * LCD TVs

* Low EMI

* Unique Spread-Spectrum Mode Offers 5dB Emissions Improvement Over Conventional Methods

* Up to 88% Efficient into 16Ω

* 12W+12W Continuous Output Power into 8Ω

* 15W+15W Continuous Output Power into 16Ω

* Low 0.07% THD+N

* High PSRR (80dB at 1kHz)

* 10V to 25V Single-Supply Operation

* Differential Inputs Minimize Common-Mode Noise

* Pin-Selectable Gain Reduces Component Count

* Industry-Leading Click-and-Pop Suppression

* Low Quiescent Current (24mA)

* Low-Power Shutdown Mode (0.2µA)

* Short-Circuit and Thermal-Overload Protection

* Available in Thermally Efficient, Space-Saving 56-Pin TQFN (8mm x 8mm x 0.8mm) Package