The A7013 is a cost-effective 2.5W mono filter-free class-D audio power amplifier, designed with Apexone proprietary EFS (Enhance Feedback Structure) technology and architecture. The device can drive speakers as low as 4O. Apexone EFS technology has the advantage over traditional PWM class D audio power amplifier and increases the performance dramatically for audio solutions. It reduces THD and EMI effectively and offers low distortion across both the wide audio output power range and the full audio frequency domain. The device utilizes a fully differential architecture and a full-bridged output. The A7013 features high 81dB PSRR, as low as 0.02% THD+N, and 88dB or higher SNR. Short circuit and thermal-overload-protection prevents the devices from being damaged during over current conditions. Integrated internal mute control function suppresses pop/click sound. The high efficiency of the A7013 eliminates the need of external heat sinks and extends battery life.

■ 2.5W into 4O load (THD+N=10%, Vcc= 5V)

■ 0.022% THD+N

■ High efficiency：91% at 5V, 1W with 8O load；88% at 3.6V, 400mW with 8O load

■ Low quiescent current of 2.3mA

■ Low shutdown current of 0.04uA

■ Adjustable gain by external resistor.

■ 81dB PSRR at 217Hz

■ Internal mute function to reduce pop noise

■ 2.5V to 5.5V single supply operation

■ Thermal and short-circuit protection

■ Optimized PWM output stage eliminating LC output filter

■ Proprietary technology to reduce EMI

■ ESD protection on all pins

■ WLCSP and QFN packages

■ It can be used in various applications such as mobile phone, MP4, PDA, Portable DVD, and notebook computer.