Friday, October 16, 2009
Here is High-Performance 56 Watt Audio Power Amplifier with Mute Circuit used IC LM3876. an output mute function which can be used to eliminate switch-on and switch-off "thumps" to the loudspeaker load. the circuit capable of delivering 56 Watt into 8ohm load. The output stage is protected against short circuit to ground or either supply rail. Protection against transients from inductive loads is also provided at the output stage via internal clamp diodes.
The IC LM3876 also contains thermal shut-down protection which comes into operation if the chip temperature exceeds its safe operating range, and under-voltage shut-down in the event it to operate properly. When S1 is closed switch-on / switch-off muting is enabled. Applications include self-powered speakers, surround-sound amplifiers and compact stereo systems.
Parameters IC LM3876
Power@ 4Ohms, 1% THD...................60 Watt.
Power@ 8Ohms, 1% THD..................45 Watt.
Power@ 8Ohms, 10% THD................56 Watt.
THD Conditions.................................Po=40W @ Vs=±35V.
User Supply........................................35 Volt.
Supply Range.....................................+24 - +84V.
Temperature Min...............................-20 deg C.
Temperature Max..............................85 deg C.
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