Hi. I wanted to try my Ta2022 amplifier which i bought many years ago and did not try in the past( i heard tripath sounds good so i wanted to try it today) I connected to symmetrical 21v toroidal transformer ( it writes 24 0 24 ac ) Power led lights on but no sound coming from speaker. Bridge diode and Ta2022 chip also gets warm ( 21celcius and cooler 15celcius degree) I also have tpa3116 and it worked at first connection but this have no sound. What can be the problem ? I put my fingers on signal lines and still no sound. Is it in mute mode ?
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It seems that you have connected AC from the transformer to the amp board when you need to connect DC. If the amp board requires a split rail supply like 24-0V-24 then you need to build a split rail DC supply. If you use a 24vac transformer you will end up with 33vdc which may be too much.
Hi. Yes i measured it. My transformer is rated at 19v 0 19v ac and without load it is about 28volts on board capacitors.
Sorry, I can now see the bridge rectifier behind the AC input block😎
https://pdf.datasheetcatalog.com/datasheet/Tripath/mXyzxwwu.pdf
ABSOLUTE MAXIMUM RATINGS (Note 1) SYMBOL PARAMETER Value UNITS VPP, VNN Supply Voltage (VPP1, VPP2, VNN1, VNN2) +/- 40
The datasheet says that you need a split rail +/- supply for the 2022. The on-board bridge rectifier will not give you this,
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On-board bridge rectifier will give +/- supply if the transformer has a central tap to connect to GND.