EUA2075 ds2075 ver 1.0 july 2014 1 2.8w/ch stereo filterless class-d audio amplifier w ith 64-step dc volume control, agc and headphone output description the EUA2075 is a high efficiency, 2 channel bridged -tied load (btl), class-d audio power amplifier with head phone output. operating from a 5v power supply, EUA2075 i s capable of delivering 2.8w/channel of continuous ou tput power to a 4 load with 10% thd+n. the EUA2075 features an advanced 64-step dc volume control whic h offers a range of speaker gain from -70db to 20db a nd a range of hp gain from -80db to 3.5db. the agc detec ts output signal clip due to the over level input sign al and suppresses it automatically. moreover the agc can a dapt the output clip caused by power supply voltage down with battery. the new filter-less architecture allows th e device to drive the speaker directly, without low-pass out put filters, which will save system cost and pcb area. the EUA2075 also features short-circuit and thermal protection preventing the device from being damaged during a fault condition. the EUA2075 is available in 24-pin sop and 20-pin 44 tqfn package. typical application circuit features wide supply voltage: 2.7v to 5.5v unique modulation scheme reduces emi emission 2.8w/ch into an 4 load from 5v supply 64-step dc volume control headphone output function auto gain control thermal and short-circuit protection integrated click and pop suppression available in sop-24 and tqfn-20 packages rohs compliant and 100% lead(pb)-free halogen-free applications lcd monitors/tvs all-in-one pcs portable audio notebook pc figure1.
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