EUA2036 ds2036 ver 1.1 dec. 2009 1 low emi, 2.8-w mono filterless class-d audio power amplifier with auto-recovery description the EUA2036 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 design. operating in a single 5v supply, EUA2036 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 EUA2036 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 EUA2036. the gain of EUA2036 is externally configurable which allows independent gain control from multiple sources by summing signals from separate sources. the EUA2036 is available in space-saving wcsp and tdfn packages. typical application circuit features z unique modulation scheme reduces emi emissions z short circuit auto-recovery z efficiency at 3.6v with an 8- ? speaker: ? 84% at 400 mw z low quiescent current and shutdown current z 2.5v to 5.5v wide supply voltage z shutdown pin compatible with 1.8v logic gpio z optimized pwm output stage eliminates lc output filter z improved psrr ( ? 68 db) eliminates need for a voltage regulator z fully differential design reduces rf rectification and eliminates bypass capacitor z improved cmrr eliminates two input coupling capacitors z internally generated 250-khz switching frequency z integrated pop and click suppression circuitry z 1.5mm z rohs compliant and 100% lead(pb)-free halogen-free applications z ideal for wireless or cel lular handsets and pdas figure1.
|
