45W Single Chip Amplifier by LM3876

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This circuit is based on the National Semiconductor LM3876. This device is capable of delivering as much as 56W of continuous average power into an eight ohm load with 0.1% THD from 20Hz to 20Khz. Be sure to provide an adequate heat sink for the package.

Use log pots for volume, bass and treble. A stereo amplifier can be built using ganged pots and a Stancor 402 transformer instead of the 401.

Note that the delivery of power to the speakers is primarily a function of the power supply voltage and capacity in Class A amplifier. In our case, we’re using a +/- 33 volt volt supply which is designed around a Stancor RT401 transformer. Use extreme caution when working with line voltages.

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http://web-ee.com/schematics/amplifiers/45watt-single-chip-amp/
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This entry was posted on Friday, January 25th, 2008 at 4:17 pm and is filed under Power Amplifier. You can follow any responses to this entry through the RSS 2.0 feed.