BM0120 20w audio class d+ general description the BM0120 is one channel audio am plifier m odule, using unique close loop and feed forward com p ensation techniques (clffc?ip belong bm) to achieve better thd+n from 20hz to 20khz. the m odule can deliver output power up to 35w (rms) @4ohm load. the m odule has m u te function with logic high or low control. the voltage gain can be adjusted in the m odule via fi x feedback resistor, the input signal is flexible. no other external com p onents from input to output , and connect to speaker directly. friendly analog input interface. very high efficiency , do not need heat-sink under 20w(rms) the BM0120 integrated m u te circuit inside , it very suits for application in lcd tv , pd p tv , projection tv and car audio . applications car audio -------2/4 channels pdp -------------2.1 channel projection tv -----2.1 channel lcd tv--------2 channel dvd player features w i de vdd input range of +9v ~ +26v reduce system cost with no heat sink and save power class d+ and clffc ip inside excellent bass frequency without big bypass dc capacitor inside internal therm a l protection connect to any passive 4 or 8 ohm speaker no mute on/off noise thd+n : < 0.2%@1w / 1khz snr : 80db cross noise with other channels : 80db output power (rms) is depend on the vdd and load (thd<10%) 30w @ 4ohm /+24v 20w @ 4ohm /+18v 13w @ 4ohm /+12v 15w @ 8ohm /+24v very slim size : 46mm*31mm pin1 = audio input pin2 = a-gnd pin3 = gnd pin4 = +5v pin5 = mute control pin6 = vdd (+9v ~ +25v) pin7 =gnd pin8 = out ? p i n 9 = o u t + b=46mm 3 9 a=31mm gap between pin1 and pin9 is 40.36mm 1 gap between pin1 and a is 2.8mm gap between pin1(6) and pin2(7) is 2.54mm 5 6 4 8 7 2 b o o k l y m i c r o e l e c t r o n i c l i m i t e d c o
BM0120 20w audio class d+ external application circuit: power supply (+5v and vdd) 1 2 3 vdd +5v dgnd 0.47uf 220uf/35v +9v ~ +28v note1: keep +5v pow er up same as vdd or +5v earlier. speaker gnd +5v 1 2 audio input 8 5 agnd 4 3 7 mute="1" 9 gnd 4/8 ohm vdd 6 note2: mute = 1 , un-mute = 0 or open audio input capacitor has been filled in this module, external couple capacitor is not necessary. b o o k l y m i c r o e l e c t r o n i c l i m i t e d c o
BM0120 20w audio class d+ c h a m pi on m i c r o 09/ 26/ 02 11: 31 : 0 9 a- a t h d + n v s f r e q u e n c y j a c k 6 .a t2 c c m 8 6 8 5 ja ck o u t p ut 1 w . 12 v . 8 o h m . l 15 u. c 0 . 22 u 8 9 5 8 c a p 1 u j u s t b e s i de pi n 1, 3 . a d d sk 12 . 86 85 1u r i g h t b e s i de i c . 12 v ec c h an ge 10 0 0 u be s i d e 8 9 5 8 . 0 2. 2 0. 2 0. 4 0. 6 0. 8 1 1. 2 1. 4 1. 6 1. 8 2 % 20 20k 50 10 0 2 00 50 0 1 k 2 k 5 k 1 0k hz w h en application in over 25w , a sm all heat-sink is expected b o o k l y m i c r o e l e c t r o n i c l i m i t e d c o
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