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| BM0120 20W AUDIO CLASS D+ GENERAL DESCRIPTION The BM0120 is one channel audio amplifier module, using unique close loop and feed forward compensation techniques (CLFFC--IP belong BM) to achieve better THD+N from 20Hz to 20KHz. The module can deliver output power up to 35W (RMS) @4ohm load. The module has mute function with logic high or low control. The voltage gain can be adjusted in the module via fix feedback resistor, the input signal is flexible. No other external components 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 mute circuit inside , it very suits for application in LCD TV , PDP 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 Wide 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 thermal 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 20W 13W 15W @ 4ohm /+24V @ 4ohm /+18V @ 4ohm /+12V @ 8ohm /+24V b=46mm Pin1 = Audio input Pin2 = A-GND Pin3 = GND Pin4 = +5V Pin5 = Mute control Pin6 = VDD (+9V ~ +25V) Pin7 =GND Pin8 = Out - Pin9 = Out+ a=31mm 1 2 3 4 5 Very slim size : 46mm*31mm Gap between pin1 and a is 2.8mm Gap between pin1 and pin9 is 40.36mm Gap between pin1(6) and pin2(7) is 2.54mm Bookly Micro Electronic Limited Co 6 7 8 9 BM0120 20W AUDIO CLASS D+ External application circuit: Power supply (+5V and VDD) +9V ~ +28V VDD +5V 3 2 1 0.47uF 220uF/35V DGND Note1: keep +5V power up same as VDD or +5V earlier. Mute="1" Audio input +5V 5 4 VDD 1 2 3 6 8 9 7 SPEAKER 4/8 ohm AGND GND GND Note2: Mute = 1 , un-Mute = 0 or open Audio input capacitor has been filled in this module, external couple capacitor is not necessary. Bookly Micro Electronic Limited Co BM0120 20W AUDIO CLASS D+ C h am p io n m ic ro 2.2 2 1.8 1.6 1.4 1.2 % 1 0.8 0.6 0.4 0.2 0 20 A -A T H D + N vs F R E Q U E N C Y 0 9 /2 6 /0 2 1 1 :3 1 :0 9 50 100 200 500 Hz 1k 2k 5k 10k 20k C M8 6 8 5 Ja ck O u tp u t 1 W . 1 2 V. 8 O h m . L 1 5 u . C 0 .2 2 u 8 9 5 8 C a p 1 u ju s t b e s id e P in 1 ,3 . Ad d S K 1 2 . 8 6 8 5 1 u rig h t b e s id e IC . 1 2 V E C c h a n g e 1 0 0 0 u b e s id e 8 9 5 8 . ja c k 6 .a t2 c when application in over 25W , a small heat-sink is expected Bookly Micro Electronic Limited Co |
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