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Part Number: TAS5806M
Hello everyone.I tested the TAS5806M powered at 12V and everything works perfectly, but if it is powered at 24V the TAS5806M heats up and immediately goes into protection. What am I doing wrong?
Is your test with a speaker load? You might be violating the minimum speaker load spec for the device, please look at section 7.3 Recommended Operating Conditions in the TAS5806M datasheet.
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In reply to Luis Fernandes de Pina:
Yes, I am using 8 Ω speakers and I have noticed that even without audio and without the speakers it overheats when I go beyond 21V.
I am attaching a photo of the PCB.
In reply to Francesco Cornacchia:
Can you provide a Schematic and layout of your design.
Can anyone help me?I did other tests and from 21V onwards even without music, in a short time the TAS5806M heats up and goes into protection.Below it continues to work perfectly
Looking at the image you provided and the layout images, they appear to be different boards. Can you show the layout for the board you are seeing the overheating issues on. Also have you tested this on multiple PCBs. The soldering job on the board you provided a picture of is not clean, so it could cause issues with the performance of the device.
Hi Luis, Yes I have tested the operation on multiple PCBs and I have found the same problem on all of them. I am currently testing the PCB of the last photos I sent. I am also attaching the real photo.These days I have partially solved the problem by changing the PWM Mode from BD Mode to 1SPW Mode and the Loop Bandwidth from 80KHz to 175KHz. Now it heats much less. Can I do something else to improve the result even more?
Thanks a lot.
The Loop BW, and 1SPW modulation would be the only software/firmware changes that could impact thermal performance. Most of the impact would involve changes to your layout. Looking further at your layout there are several issues that would impact thermal performance.
Please see the below image for suggestions on layout/thermal designs. It says for TAS5805/25 but applies for TAS58XX family, you can also see our EVMs for reference.
Ok, thanks for the advice. I'll take a look.
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