Tpa3221 temperature, how hot is too hot in general for an amplifier chip ?

[jst]

I bought a tpa3221 amp kit but it doesn't come with a fan. The recommended voltage by the manufacturer is 30 volt but I use 32volt which is max for tpa3221 and it works okay.

But if I crank up the volume to the point it draws power to 10 watt from wall socket (from AC watt meter), the temperature will rise to as high as 44.5 degree celcius (as of this writing), with no fan. Is that safe ? It will probably still rise if I keep playing music at a very loud volume, or cmiiw ? atm it's 44.5 highest.

How hot is too hot for tpa3221 or amplifier chip in general before it's not considered safe or a fan is needed ?

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it goes up to 45.1 , I'll just go back to my 19v adapter until someone reply lol.
Seems like the voltage doesn't matter it's still 43C. I have been using it for days without checking temp though and it's fine I leave it on from the time I wake up to sleep. Does that sound okay if I use it like that with that temp ?

 

[Sokel]

I bought a tpa3221 amp kit but it doesn't come with a fan. The recommended voltage by the manufacturer is 30 volt but I use 32volt which is max for tpa3221 and it works okay.

But if I crank up the volume to the point it draws power to 10-17 watt from wall socket (from AC watt meter), the temperature will rise to as high as 44.5 degree celcius (as of this writing), with no fan. Is that safe ? It will probably still rise if I keep playing music at a very loud volume, or cmiiw ? atm it's 44.5 highest.

How hot is too hot for tpa3221 or amplifier chip in general before it's not considered safe or a fan is needed ?

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it goes up to 45.1 , I'll just go back to my 19v adapter until someone reply lol.

What and exactly where are measuring these temps?
In general,no,it's not high.

How is the chip cooled?Heatshink?

 

[jst]

What and exactly where are measuring these temps?
In general,no,it's not high.

How is the chip cooled?Heatshink?

I measure the temp using temperature gun for surface. On the heatsink , geez now that you ask I just realize its the heatsink, the chip must be hotter

Yea only heatsink.

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This guy crank up the volume to the point it fluctuates to 40-150 watt on 30v , I wonder how hot it will be.

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If I use fan it can go down to like 30 ish but the fan adapter will be hot. (12v 1A)

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but seems like 43-45 is max it doesnt go up anymore, at least for now.


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I'm also curious, if I crank up my volume to like 10-11 o'clock, my wattmeter only shows 17 watt. how can the guy in that youtube video get 150 watt ????? Is it because he uses bigger speakers/power hungry speakers ? 11o'clock is already too loud for me. Even that is me pushing it because I'm curious but I dont know if I can still go higher with my speaker set.

 

[restorer-john]

the temperature will rise to as high as 44.5 degree celcius (as of this writing), with no fan. Is that safe ?

Absolutely no problem at all. That's pretty cool actually.

110 degrees C above ambient is tolerable for most semiconductors and many can do 175 degrees above ambient (200C) although they will be running right on the edge (heavily de-rated) at that point.

I have no problem with an amplifier running at 60-70 degrees C (average), as long as you don't have spot heating way above that.

Electronics can tolerate and operate at temperatures well above what we 'humans' think is really hot.

My daily driver power amplifier (Sony TAN-77es) idles at around 63 degrees C looking down through the grille at the 'hottest' point with my thermal imager. That amplifier is 35 years old...

 

[Sokel]

40's and 50's is nothing to worry about.
But yes,if you want it loud put a fan on it.

 

[jst]

I see, it's safe then. Thanks all.

(I usually never bother with it but I just found temp gun lying around and curious then checked it.)

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I'm still curious on how to draw above 100watt to my speakers....is it just as easy as turning the knob all the way to the right ? Or I need bigger speakers

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damn 63C and I'm worried at 40 hahah

Absolutely no problem at all. That's pretty cool actually.

110 degrees C above ambient is tolerable for most semiconductors and many can do 175 degrees above ambient (200C) although they will be running right on the edge (heavily de-rated) at that point.

I have no problem with an amplifier running at 60-70 degrees C (average), as long as you don't have spot heating way above that.

Electronics can tolerate and operate at temperatures well above what we 'humans' think is really hot.

My daily driver power amplifier (Sony TAN-77es) idles at around 63 degrees C looking down through the grille at the 'hottest' point with my thermal imager. That amplifier is 35 years old...

View attachment 411032

 

[MaxwellsEq]

I'm still curious on how to draw above 100watt to my speakers....is it just as easy as turning the knob all the way to the right ?

As you increase the volume control, the voltage across the speaker increases. So does the current in proportion. The speaker doesn't "suck" or "draw" power - the output stage supplies volts and amps in proportion to the gain, volume setting and input level. So if you increase the input level, increase the gain or turn the volume up, you may get to 100W. But you will probably damage your hearing, the speakers and perhaps the amplifier.

 

[Old_School_Brad]

Operating temp -40 - 85 °C

TPA3221 data sheet, product information and support | TI.com

TI’s TPA3221 is a 100-W stereo, 200-W mono, 7- to 32-V supply, analog input Class-D audio amplifier w/ low idle. Find parameters, ordering and quality information

www.ti.com

 

[jst]

As you increase the volume control, the voltage across the speaker increases. So does the current in proportion. The speaker doesn't "suck" or "draw" power - the output stage supplies volts and amps in proportion to the gain, volume setting and input level. So if you increase the input level, increase the gain or turn the volume up, you may get to 100W. But you will probably damage your hearing, the speakers and perhaps the amplifier.

I use the same amp as the person in the video above, only different speakers but his watt meter shows the output can reach 145 watt...as you can see in the image below. He's probably used to testing speakers and amp and also know how loud is too loud lol.

(I also notice when I was still using other amp, when I attached a 12inch sub, it "drew" more power easily to like 18 watt, or maybe because I turned the volume more because bigger spkr can easily receive more power and less worrying in the sound it produced.)

Operating temp -40 - 85 °C

TPA3221 data sheet, product information and support | TI.com

TI’s TPA3221 is a 100-W stereo, 200-W mono, 7- to 32-V supply, analog input Class-D audio amplifier w/ low idle. Find parameters, ordering and quality information

www.ti.com

Aha thanks. It's more official now I checked the pdf though, but probably overlooked.

It also says :
Power stage supply (max) (V) 30
Analog supply voltage (max) (V) 30
32v is still ok ? I think it says the absolute max is actually 37 in the pdf if I understand it correctly.

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Does voltage contribute to heat ? or is it the ampere ? since cable size I read doesn't care about voltage but more on the amperage.

 

[MaxwellsEq]

I use the same amp as the person in the video above, only different speakers but his watt meter shows the output can reach 145 watt

That's somebody else's setup and experience. Unless you recreate the test load he is using, your results will be different.

when I attached a 12inch sub, it "drew" more power

Please see my previous post - the speaker does NOT draw power. That's not how electronics works.

Does voltage contribute to heat ? or is it the ampere ? since cable size I read doesn't care about voltage but more on the amperage

Please spend a bit of time reading Ohms law. ESPECIALLY how power is derived from current-squared multiplied by resistance, OR from voltage-squared divided by resistance. Then you will be able to answer your own questions.

Heat is mostly a function of current. So for a fixed voltage, a lower resistance speaker will cause a higher current to flow through the load, warming it up and warming the amplifier up as well.