30w class ab amplifier circuit with

Posted on Feb 7, 2014

To set the above amplifier up, set R1 to max and R12 to 0. After doing this successfully, power on the amplifier. Set R1 so that the measured output offset is between 30 and 100mV. Once set, adjust R12 slowly to achieve a quiescent current of around 120mA. Keep checking the quiescent current as the amp heats up as it might change due to voltage dr

30w class ab amplifier circuit with
Click here to download the full size of the above Circuit.

op changes in the output devices caused by heat. The heatsinks should be 0. 6K/W or less for two amplifiers.

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