I forgot to mention that I am using TPA3116D2.
I removed the capacitors C5 and C6 (1uFx16V) EVM and the defect that presents in my project, presents in EVM.
The question now is whether this value (1uFx16V) is critical? Or the capacitance may vary as much as the voltage.
I await contact.
I'm finding instability in my circuit. By increasing the supply voltage above 17V enters saturation and cuts and back for a second.
Researching data sheet realize that the problem is in Plimit pin because in my circuit is unstable because the EVM board from Texas is stable at 7 VDC for any variation in tension.
My circuit is equal to the EVM.
Where can I have a problem ??
I removed the capacitors C5 and C6 (1uFx16V) EVM and the defect that presents in my project, presents in EVM.
The question now is whether this value (1uFx16V) is critical? Or the capacitance may vary as much as the voltage.
I await contact.
I'm finding instability in my circuit. By increasing the supply voltage above 17V enters saturation and cuts and back for a second.
Researching data sheet realize that the problem is in Plimit pin because in my circuit is unstable because the EVM board from Texas is stable at 7 VDC for any variation in tension.
My circuit is equal to the EVM.
Where can I have a problem ??
I forgot to mention that I am using TPA3116D2.
I removed the capacitors C5 and C6 (1uFx16V) EVM and the defect that presents in my project, presents in EVM.
The question now is whether this value (1uFx16V) is critical? Or the capacitance may vary as much as the voltage.
I await contact.
I'm finding instability in my circuit. By increasing the supply voltage above 17V enters saturation and cuts and back for a second.
Researching data sheet realize that the problem is in Plimit pin because in my circuit is unstable because the EVM board from Texas is stable at 7 VDC for any variation in tension.
My circuit is equal to the EVM.
Where can I have a problem ??
I removed the capacitors C5 and C6 (1uFx16V) EVM and the defect that presents in my project, presents in EVM.
The question now is whether this value (1uFx16V) is critical? Or the capacitance may vary as much as the voltage.
I await contact.
I'm finding instability in my circuit. By increasing the supply voltage above 17V enters saturation and cuts and back for a second.
Researching data sheet realize that the problem is in Plimit pin because in my circuit is unstable because the EVM board from Texas is stable at 7 VDC for any variation in tension.
My circuit is equal to the EVM.
Where can I have a problem ??
Which thread are you going to use?
This one or this one: http://www.diyaudio.com/forums/class-d/279281-plimit-tpa3116d.html#post4440927
You have double posted in this thread twice and you have posted the same question in another thread that you have started. (here: http://www.diyaudio.com/forums/class-d/279281-plimit-tpa3116d.html#post4440927 )
I just wanted to know which one you will be using to get help with your questions.
OK.
From my post of 02 Sept:
Your actual schematic and pix of the board and your hookup details might help.
But in the mean time:
Did you use R4 as a pot to adjust the plimit?
All of my board types have the equivalent of JP4 installed and R4 not attached to plimit. (4 so far)
The hookup for plimit I used is the way the data sheet uses it...connect pin 6 to pin 7.
I want the device to deliver the maximum it can to my speakers...when it needs to.
IMHO putting in plimit to lower than max is for protection of commercial products.
Hope that helps.
Last edited:
DUG friend.
as I try to extract the maximum power of the TPA3116, always used the pin 6 and 7 shorted.
recently put a resistor 1R, to see some variation and used a zener diode 6V8, because I realized that the only Plimit pin triggers protection when the voltage goes from 7V on this pin.
I'm using tantalum capacitor 1uF x 35V.
as I try to extract the maximum power of the TPA3116, always used the pin 6 and 7 shorted.
recently put a resistor 1R, to see some variation and used a zener diode 6V8, because I realized that the only Plimit pin triggers protection when the voltage goes from 7V on this pin.
I'm using tantalum capacitor 1uF x 35V.
From the data sheet;
"Add a 1 μF capacitor from pin PLIMIT to ground to
ensure stability."
Don't leave home without it. 🙂
From the data sheet:
"The TPA31xxD2 family has a built-in voltage limiter that can be used to limit the output voltage level below the supply rail, the amplifier simply operates as if it was powered by a lower supply voltage, and thereby limits the output power."
So by setting a plimit value you establish a certain level of threshold. That level is not reached until the supply is high enough for it to take effect.
The amp should act as though it has a lower supply voltage.
Now that the waveform looks saturated, the load MAY be drawing enough current to go into current limit...causing a over current fault.
Then: "If automatic recovery from the short circuit protection latch is desired, connect the FAULTZ pin directly to the SDZ pin. This allows the FAULTZ pin function to automatically drive the SDZ pin low which clears the shortcircuit protection latch."
Is this what is happening?
Monday, I will analyze the stress levels in FAULTZ and SDZ pins at the time of saturation and set the values.
Are there any recommended boards at the moment, after going through a few hundred pages in this thread I'm not sure anymore which ones are good.
And is it a good idea to swap the most likely fake TPA3116D2 chip with an original?
A PCB and getting my own components would also be fine for me as long as there is not too much (hopefully only the IC) SMD on it.
And is it a good idea to swap the most likely fake TPA3116D2 chip with an original?
A PCB and getting my own components would also be fine for me as long as there is not too much (hopefully only the IC) SMD on it.
I have most examples and except for using linear regulated power supplies they remain stock. My favorite is the new dual chip TPA3116.
You can mod these things till the cows come home but unless you keep one stock and do an A/B comparison you'll never know if the mod sounds better or whether it's just your expectation bias.
You can mod these things till the cows come home but unless you keep one stock and do an A/B comparison you'll never know if the mod sounds better or whether it's just your expectation bias.
well to be honest i suspect every single one of them to be fake. I suspect that this is something like those LM2596 switching regulators that you can get for 2 euro a piece; they work but it is not an original IC. If I remember correctly in the DCDC converter case the fake ones run at a far lower frequency than a real ones.
Did anyone ever verify with TI whether the IC they bought is real? because I think that at 2 euro per chip for a 16 euro (inc shipping) product that they will put in a fake one if they can get those cheaper
on a side note, can the TPA3116 drive an 8 ohm load or should I look for the 3118 in that case?
Did anyone ever verify with TI whether the IC they bought is real? because I think that at 2 euro per chip for a 16 euro (inc shipping) product that they will put in a fake one if they can get those cheaper
on a side note, can the TPA3116 drive an 8 ohm load or should I look for the 3118 in that case?
just a nice collection of examples: http://nepp.nasa.gov/workshops/etw2...feit Electronics - All the World's a Fake.pdf
this stuff happens for expensive stuff but also for chips of 2 euro/dollar such as the http://www.ti.com/product/LM2596 which can be found in those cheap DCDC convertors that you'll find on various internet martket places.
also interresting to read about the women and children desoldering parts above campfires and washing them in the local river 😉
Some things seem totally illogical in the western world but if labour is cheap enough unbelievable stuff can and will happen.
this stuff happens for expensive stuff but also for chips of 2 euro/dollar such as the http://www.ti.com/product/LM2596 which can be found in those cheap DCDC convertors that you'll find on various internet martket places.
also interresting to read about the women and children desoldering parts above campfires and washing them in the local river 😉
Some things seem totally illogical in the western world but if labour is cheap enough unbelievable stuff can and will happen.