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Lm1875 25W power audio amplifier

2014-11-18 18:55  
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This 25 watt audio amplifier is based on LM1875 manufactured by National Semiconductor and can give a maximum power above 30 watts for an 8 ohms impedance (for a 30 volts double supply).
The LM1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio applications.
This 25 watt audio amplifier is designed to operate with a minimum of external components. Device overload protection consists of both internal current limit and thermal shutdown.

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The audio amplifier design takes advantage of advanced circuit techniques and processing to achieve extremely low distortion levels even at high output power levels.
The amplifier is internally compensated and stable for gains of 10 or greater.
The distortions for this circuits are approximately 0.015 at 1 Khz and can be supplied by a source between 16 and 60 volts DC.
This Schematic need a double power supply +- 25 V. The IC needs to be mounted on a Heatsink and must be isolated form the ground .

Lm1875 25 watt audio amplifier