EUA2046 ds2046 ver 1.0 dec. 2010 1 low emi, 2.8-w mono filterless class-d audio power amplifier with auto-recovery description the EUA2046 is a high efficiency, 2.8w mono class-d audio power amplifier. a low noise, filterless pwm architecture eliminates the output filter, reducing external component count, system cost, and simplifying desig n. operating in a single 5v supply, EUA2046 is capable of driving 4 speaker load at a continuous average output of 2.8w/10% thd+n or 2.2w/1% thd+n. the EUA2046 has high efficiency with speaker load compared to a typical class ab amplifier. with a 3.6v supply driving an 8 speaker , the efficiency for a 400mw power level is 84%. in cellular handsets, the earpiece, speaker phone, and melody ringer can each be driven by the EUA2046. th e gain of EUA2046 is externally configurable which al lows independent gain control from multiple sources by summing signals from separate sources. typical application circuit features unique modulation scheme reduces emi emissions short circuit auto-recovery efficiency at 3.6v with an 8- speaker: ? 84% at 400 mw low quiescent current and shutdown current 2.5v to 5.5v wide supply voltage shutdown pin compatible with 1.8v logic gpio optimized pwm output stage eliminates lc output filter improved psrr (?68 db) eliminates need for a voltage regulator fully differential design reduces rf rectification and eliminates bypass capacitor improved cmrr eliminates two input coupling capacitors internally generated 250-khz switching frequency integrated pop and click suppression circuitry available in sop-8 package rohs compliant and 100% lead(pb)-free halogen-free applications ideal for wireless or cellular handsets and pdas figure1.
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