MAX9744ETH+T

MAX9744ETH+T is a 20W stereo Class D audio power amplifier. It provides Class AB amplifier performance with Class D efficiency, conserving board space and eliminating the need for a bulky heatsink. This device features single-supply operation, adjustable gain, shutdown mode, a SYNC output, speaker mute, and industry-leading click-and-pop suppression. It features a 64-step dual-mode (analogue or digital), programmable volume control and mute function. It operates from a 4.5V to 14V single supply and can deliver up to 20W per channel into a 4ohm speaker with a 14V supply. It offers two modulation schemes: a fixed-frequency modulation mode that allows one of several preset switching frequencies to be selected, and a spread-spectrum modulation mode that helps to reduce EMI-radiated emissions. Applications include flat-panel televisions, PC speaker systems, multimedia docking stations.

• Power-supply voltage range from 4.5V to 14V
• Filter less spread-spectrum modulation lowers radiated RF emissions from speaker cables
• Integrated volume control (I²C or analogue), short-circuit and thermal-overload protection
• Integrated click-and-pop suppression, low-power shutdown mode
• Total harmonic distortion plus noise is 0.04% typical at (f = 1KHz, RL = 8 ohm, POUT = 5W)
• Power-supply rejection ratio is 75dB typical at (f = 1KHz, VRIPPLE = 200mVP-P on PVDD)
• Efficiency is 93% typical at (POUT = 10W, fIN = 1KHz, 8 ohm load)
• Quiescent current is 20mA typical at (VPVDD = 12V, VDD = 3.3V)
• Shutdown current is 0.1µA typical at (VPVDD = 12V, VDD = 3.3V, TA = +25°C)
• Operating temperature range from -40°C to +85°C, 44-pin TQFN-EP package

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