EUA2068 ds2068 ver1.2 july 2014 1 3.3w mono class-d audio power amplifier with non-clip, power limit and noise gate description the EUA2068 is a high efficiency, 3.3w mono class-d audio power amplifier with non-clip, power limit an d noise gate. a low noise, filterless pwm architectur e eliminates the output filter, reducing external com ponent count, system cost, and simplifying design. EUA2068 having power limit interlock non-clip funct ion, controls gain automatically and prevents output sig nals from being clipped at the supply voltage. in additi on, this power limit function permits the maximum output to be arbitrarily specified to 100mw to 1000mw according to a speaker to use. the noise gate function removes t he tdma, dac or white noise which comes in at no-signa l state, by muting an output signal automatically whe n output level is low. with this function, the very l ow noise characteristics can be realized. furthermore, EUA2068 also integrate overcurrent and overtemperature protection functions, dc output pro tection function, under-voltage malfunction prevention func tion, as well as emi noise and the pop noise reduction functions. the EUA2068 is available in space-saving wcsp packa ge. typical application circuit features unique modulation scheme reduces emi emissions unique non-clip function , variable ncna, ncnb,ncnoff mode select 3.3w 4- load at v dd =5v, thd+n <10% low quiescent current, i dd =4ma @5v 2.5v to 5.5v wide supply voltage overcurrent protection function (ocp) overtemperature protection function (otp) dc output protection function (dcop) under-voltage malfunction prevention function (uvl) short circuit auto-recovery power limit function noise gate function 1.5mm 1.5mm wafer chip scale package (wcsp) rohs compliant and 100% lead(pb)-free halogen-free applications smart phones/cellular phones portable multimedia players figure1.
|
