TDA7267A audio amplifier done right - test and schematic

Testing one of my favorite low power audio amplifier ICs.
Mail: PO box 362, Vandalia, OH 45377
Thank You!

[GnuReligion]

I bought some of these last year, just because these are your favorite surface mount chip amps.
They worked fine.

[frontier]

I've made a few of the LM386 done rights ... it plays music in background as I write this. Now I'm making this done right circuit for a friend gift.

[cassvirgillo]

Hello John, Great video and tips on a good build. The chip sounds good to me. Thanks fur all you do making your excellent video tutorials on chip amps, Snickers helps when he's not napping. Glad you weren't adversely affected by the crazy wind storm that hit the mid west. Hope your Brother is doing well, glad you are. We had 100 degrees over the weekend, back to the mid, upper 70's. All the best from Oregon, C.

[unregistereduser]

i agree, an rf filter is necessary. i get horrible GSM buzz on mine, which a 100pf/680r folter helped with, but didn't totally eliminate.

I also get an intermittent 'click' about 1hz, but only when the input is disconnected. When its connected to a source, even if nothing is playing, the clicking stops. very odd. almost seems like the chip is trying to enter a low power mode, or an automatic gain control is looking for a signal

[BruceNitroxpro]

As always, more than interesting... useful!

[CraftAero]

Thanks again John for sharing.
My hobby has taken a bit of a hit due to "current events" but I continue to enjoy learning from you.
Is it pre-requisite that electronics guys have QC cats? Seems to be every channel I watch. My two boys, Buddy and Buster think so too.

[shvideo]

Great video, but the question begs, why not use the next generation version of these chips, or their replacement?! There is a reason they are obsolete now. Thank you for the great info!

[thTek]

the "sillyscope " hahhaahaha good one !!

[charlesdorval]

Hi John, great video!
I'm a somewhat recent subscriber so I probably missed it... you mentioned a couple times solid state amplifiers (only those chippies or generally?) have a hard time delivering low distortion at higher frequencies. Why is that?

[krowwithakay]

I bought 10 of them on ebay, from one seller (it was really cheap for the bulk) one of them worked fine but all other 9 were dead! :D your mmv but this was far from my first poor experience with buying chips on ebay:)

[MaveBassEditsfortheBlowout]

I have a question I did not seem to find a answer for. I have some more powerfull amp chips in use (from 150 to 500WRMS at 4 ohm) why do these kind of chip amps start "playing" music on their own (from the chip itself) when they are pushed to their rated power. This always concerns me that they will blow up, because this is kinda related to the amps blowing up? Any information to that?

[PeterMilanovski]

Good little amplifiers! For their age, today we have the PAM8403 which is more powerful at 3W per channel and can run off a USB 2A charger! But it's class D and though it sounds great for portable applications, the TDA's might sound better! A comparison between the two would be great! Run both at the same time and use both channels on your oscilloscope, is it possible to have both amplifier outputs showing up on the FFT at the same time?
That would be great, Being able to see both colours of the trace together and during the FFT you can see which one has a lower noise floor! If that's possible though....
Those tiny PAM amplifiers are pretty amazing for their size! I have seen another video somewhere else where someone used one to power full size 3 way Hifi speakers that had a 12 inch bass driver! 3 watts doesn't sound like much and people laugh when you tell them it's power output but the laughing stops as soon as the music starts!
It might seem like I'm promoting this little amplifier, hell I don't even like class D amplifiers! But even I will admit that it's pretty impressive for it's size.
If that's not enough power, it has a bigger brother that needs 12V and has a staggering 10W output and it's also pretty small for it's size...
You might have already covered these Amplifiers earlier and I'm sure that if you have, I have definitely seen them but I can't remember, I'm going to go and have a look if you have a video on it...

[nutsandguts]

Can I use an amp like this with +/- 12V supply, feed it 10Hz~10KHz @ 1VPP AC from a signal generator chip, and get +/-12V AC output into a 50 Ohm load?
If not, what do you recommend? My signal gen is a cheap < $10 kit and has no drive capability beyond <5 mA. I want to drive small transformers with a sine wave signal.
I don't have the money to buy fancy equipment, and thankfully, I could setup a complete electronics lab for < $50.
Sure the O'scope and the component tester are cheap Atmel based kits, but it does the job for me. An ANEG8008 works great as my DMM.
I thought, why not use an audio amp to be able to drive loads with the signal generator? Doable?

[chrisharper]

Was going to ask your thoughts on the TDA7052 since the 7267 was obsolete but I see that the 7052 is listed as obsolete also. Odd since I just bought some around the beginning of the year. Built up a 7052 to replace an lm386 circuit. No output cap needed.

[ardhi]

Hei jonh, can you try tea2025 ic amplifier

[nayannath]

HI! wanna know if i hook a 4ohm 25 watt speaker to a higher output amplifier, lets say 50+watts; will it kill the speakers? if you think this is a big issue please make a video on this topic. Thank you!

[DIYBill]

Hi John

Can you give us some ideas for clean amplifier rectifier circuits with right components that reduce noise low ripple ?

[HillsWorkbench]

What is the best chip-amp for a split 15V supply? To act as a headphone amp, quality more than max output.

[Lithium]

What is the maximum voltage can we use for Lm3886? I have a 24-0-24 5 amp transformer can I use it to power LM3886? Because after rectification it will be come 33.84V +/-. Will the chip withstand that?

[EngineeringEssentials]

That was surprisingly good small amplifier! PAM 8403 is worse than this one.