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???? ?? ? d ? 2013 ? ???? ? www.egmicro.com 1 / 11 ? v1.0 201 3 0 1 30 EG8305 ?
???? ?? ? d ? 2013 ? ???? ? www.egmicro.com 2 / 11 ?? 1. ? ................................ ................................ ................................ ................................ ................................ ..... 3 2. ................................ ................................ ................................ ................................ ................................ ..... 3 3. ? ................................ ................................ ................................ ................................ ............................. 3 4. ................................ ................................ ................................ ................................ ................................ ..... 4 4.1. ? ................................ ................................ ................................ ................................ ............. 4 4.2. ................................ ................................ ................................ ................................ ............. 4 5. ?? ................................ ................................ ................................ ................................ ............................. 5 6. ?? ................................ ................................ ................................ ................................ ..................... 6 6.1 EG8305 ??? ................................ ................................ ................................ .................... 6 7. ................................ ................................ ................................ ................................ ............................. 6 7.1 ? ................................ ................................ ................................ ................................ ............. 6 7.2 ................................ ................................ ................................ ................................ ............. 7 7.3 ? ................................ ................................ ................................ ................................ ................. 7 7.4 ................................ ................................ ................................ ................................ ............. 7 8. ?? ................................ ................................ ................................ ................................ ............................. 9 8.1 ri ................................ ................................ ................................ ................................ . 9 8.2 ? ci ................................ ................................ ................................ ................................ . 9 8.3 ? ................................ ................................ ................................ ................................ ............. 9 8.4 ? emi ................................ ................................ ................................ ................................ ...... 9 8.5 pcb ................................ ................................ ................................ ................................ ............ 1 0 9. ? ? ................................ ................................ ................................ ................................ ........................... 11 9.1 sop8 ?? ................................ ................................ ................................ ................................ .. 11
???? ?? ? d ? 2013 ? ???? ? www.egmicro.com 3 / 11 EG8305 ?? 1. ? ? emi ? ??? ? 3w ? 5v ? 4 ? ? 0.1%thd 0.5w ? 3.6 ? ? ? d ? ? ?? 90% ? psrr: - 80db(217hz) ? ?? 3ma 3.6v ?? ? ? 3.0v - 5 . 5 v ? ??? ? ?? sop8 ?? 2. EG8305 3w ? d ?? psrr ???? ? 90% ? pcb ? EG8305 ???? ? 1ms ?? ?? EG8305 ?????????? ? pcb ??? ? ? 3. ? ? ? / ? ? mp4/mp3 ? gps ? ?? ?
???? ?? ? d ? 2013 ? ???? ? www.egmicro.com 4 / 11 4. 4.1. ? ? 4 - 1. EG8305 ?? 4.2. i/o 1 ctrl i ?? 2 bypass i ? 3 inp i 4 in n i ? 5 von o ? 6 v dd power ? 7 gn d gnd 8 v op o ? e g 8 3 0 5 1 2 3 4 8 7 6 5 c t r l b y p a s s i n p i n n v o p g n d v d d v o n 1 6 1 5 1 4 1 3
???? ?? ? d ? 2013 ? ???? ? www.egmicro.com 5 / 11 5. ?? ? 5 - 1. EG8305 ?? p w m m o d u l a t o r g a t e d r i v e s c p r o t e c t o s c b i a s a n d v r e f 8 4 3 7 6 5 i n p g a t e d r i v e s t a r t u p p r o t e c t i o n c t r l o t p 1 i n n v d d v o n v o p g n d c t r l
???? ?? ? d ? 2013 ? ???? ? www.egmicro.com 6 / 11 6. ?? 6.1 EG8305 ??? ? 6 - 1. EG8305 ??? 7. 7.1 ? ? t a = 25 v dd ? - - 6 .0 v v i ? - - 0.3 vdd+0.3 v t a ? - - 40 85 t j - - 40 125 t stg ? - - 65 150 t sld ? 10 - 25 0 ???????????????? v d d i n p i n n c t r l 3 4 1 0 . 1 u f v d d v o n v o p 5 8 g n d 1 u f 7 6 3 0 k 0 . 1 u f 3 0 k v d d b y p a s s 1 u f 2 e g 8 3 0 5
???? ?? ? d ? 2013 ? ???? ? www.egmicro.com 7 / 11 7.2 ? t a = 25 7.3 ? ? t a = 25 7.4 v dd =5v,g ain =25 db ,r l=l(33uh)+r+l(33uh) , t = 25 , ? v dd ?? - 3.0 - 5.5 v t a ? - - 40 - 85 t j - - 40 - 125 ja sop - 8 ? 95 - 110 /w j c sop - 8 ? - - 110 /w v in ? - - 2.5 - 5.5 v p o ? thd+n=10%,f=1khz,rl=4 vdd=5.0v - 3 . 0 - w vdd=3.6v - 1.8 - vdd=3.0v - 1.25 - thd+n=1%,f=1khz,rl=4 vdd=5.0v - 2.66 - w vdd=3.6v - 1.3 - vdd=3.0v - 0.93 - thd+n=10%,f=1khz,rl=8 vdd=5.0v - 1.95 - w vdd=3.6v - 0.95 - vdd=3.0v - 0.7 - thd+n=1%,f=1khz,rl=8 vdd=5.0v - 1.48 - w vdd=3.6v - 0.72 - vdd=3.0v - 0.52 - thd+n ? v dd =5.0v,p o =0. 2 w,r l =8 f=1khz - 0. 2 - % v dd =3.6v,p o =0. 1 w,r l =8 - 0. 4 -
???? ?? ? d ? 2013 ? ???? ? www.egmicro.com 8 / 11 v dd = 3 .0v,p o =0. 1 w,r l =8 - 0.8 - v dd =5.0v,p o =0. 5 w,r l = 4 f=1khz - 0.2 - % v dd = 3.6 v,p o = 0.5 w,r l =4 - 0. 4 - v dd =3. 0 v,p o = 0. 1w,r l =4 - 0. 55 - psrr ?? vdd=5.0v,inputs ac - grounded with cin= 1 f f= 217 hz - - 63 - db f=1khz - - 63 - f=1 0 khz - - 50 - t on ? v dd =3. 6 v - - 1 - ms snr vdd=5.0v, thd=1% , r l = 8 f=1khz - 65 - db vn inputs ac - grounded - - 100 - v rl=8,thd=10% f=1khz - 90 - % rl=4,thd=10% - 8 6 - iq ? vdd=5.0v r l = 4 - 5 - ma vdd=3. 6 v - 4 - vdd=3. 0 v - 3 - isd ?? vdd= 3.0 v to 5. 0 v v sd =0.3v - < 1 - a v os ? ? vin=0v, vdd=5v - - 10 - mv otp ?? vdd=5.0v - 150 - c oth 3 - 3 0 - cmrr ?? v ic =100v pp f=1khz - 63 - db r dson ??? ? high side pmos low side nmos i=500ma v dd =5v - 4 6 5 - m v dd =3.6v - 4 85 - v dd =3.0v - 5 1 0 - fsw ? vdd= 3.0 v to 5. 0 v - - 250 - khz v ih ?? vdd= 5.0 v - 1 - v v il ?? - 0.7 -
???? ?? ? d ? 2013 ? ???? ? www.egmicro.com 9 / 11 8. ? ? 8.1 ri EG8305 ??? r i +r e ?????? r f ??? 2 ???????? ? 180 EG8305 ?? a =20*log [2*((rf /(ri +re ))] eg8 3 0 5 ? r f =180k r i ??h? 20k ? 25db 8.2 ci ?? ci ??????? ci ri ??????? fc= 1 2 rici ci ?? ? ????????? ri ? 100k ? ?? ? 40hz ? ci= 1 2 fcci ?? ci ?? 0.2mf ????? 0.22mf 1.0mf ?? ???? ri+rf ci ????? ????????????? ???????????? dc ?? vdd/2 ?? ???? ??????? 8.3 ? EG8305 ? cmos ????????? thd ?????????????? ?????? ?????? ?? ??? ?????? 1uf, ??? vdd ? ??? ?????? 10uf ? 8.4 ? emi ??? emi ? 8 - 1 ?
???? ?? ? d ? 2013 ? ???? ? www.egmicro.com 10 / 11 ? 8 - 1 . ???? ? 1mhz ??? ??????????? ? 8.5 pcb ? 1uf ??t???? vdd EG8305 vdd ? ????? ?? emi emi ????? ????????? o u t + 2 0 0 p f o u t - f e r r i t e b e a d 2 0 0 p f f e r r i t e b e a d
???? ?? ? d ? 2013 ? ???? ? www.egmicro.com 11 / 11 9. ? ? 9.1 sop 8 ??

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