Part Number: TPA3220EVM-MICRO
I am having issues with the TPA3220 EVM MICRO. I set everything up according to the quick start instructions in the user guide, using 5 ohm resistors as a load. Connecting a signal at 1kHz with amplitude (10mV ... 150mV), I get the following behavior:
Is the device broken, or what could be the reason for this strange behavior?
Thank you very much for any help.
No input signal:
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In reply to Shawn Zheng:
Thanks for your reply.
The FAULT LED stays off, however. (It blinks once when I flip the reset switch and then stays off, but that seems to be the desired behavior?). But the CLIP_OTW LED keeps flickering... I am using the standard stereo BTL mode (I did no modifications on the board).
Any suggestions are greatly appreciated.
In reply to Christian Funck:
In reply to Robert Clifton56:
the voltage is around 5.14V, and stable (with some HF noise on it), both with input signal applied or no input signal.
Thanks a lot for the support so far.
Basically I connect the resistors directly on to the board. I also measured the input voltage at R15/17 and R21/24 with the scope and it is ok.
Under what circumstances is the OTW_CLIP LED actually activated?
Could the amplifier IC be damaged?
Thanks again and best regards,
Thanks for the support. Unfortunately I do not have a second board. I will send the board back to the supplier.
I will let you know what the result is.
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