Hi all,
I bought a small cheap amplifier from Ali, claimed to be TPA3116 (but cannot be, of course, at this price; i just hoped will be some 10W peak but is not, at least not on 4 ohms), and I did some tests. Audio speaking, appears to cough (typically overload audio interruptions) at beyond 3W peak/6 ohms (subjective, hearing only) . Current supply from 12 to 24V rises a bit from 25 to 30mA (for the whole board) . Oscilloscope output shows that the rectangles are full voltage, so is not supplied through some kind of internal buck converter. The output frequency is at 370kHz.
Peaks seen on oscilloscope appears to be at 700mA at 8 ohms and 1A at 8 ohms, irrespective of voltage (12-24V) but dynamic response is far better at 24V, audio interruptios are rarer.
Do anyone knows what chip was really used in these?
I bought a small cheap amplifier from Ali, claimed to be TPA3116 (but cannot be, of course, at this price; i just hoped will be some 10W peak but is not, at least not on 4 ohms), and I did some tests. Audio speaking, appears to cough (typically overload audio interruptions) at beyond 3W peak/6 ohms (subjective, hearing only) . Current supply from 12 to 24V rises a bit from 25 to 30mA (for the whole board) . Oscilloscope output shows that the rectangles are full voltage, so is not supplied through some kind of internal buck converter. The output frequency is at 370kHz.
Peaks seen on oscilloscope appears to be at 700mA at 8 ohms and 1A at 8 ohms, irrespective of voltage (12-24V) but dynamic response is far better at 24V, audio interruptios are rarer.
Do anyone knows what chip was really used in these?
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Could be anything, can't tell for certain as I would never purchase
It works but for how long ...from dodgy sellers.
Here is an example; https://www.amazon.co.uk/DollaTek-1...tag=se&keywords=tpa3116&qid=1737192501&sr=8-6
It works but for how long ...from dodgy sellers.
Here is an example; https://www.amazon.co.uk/DollaTek-1...tag=se&keywords=tpa3116&qid=1737192501&sr=8-6
Package is similar to PAM8403, so I was curious if somehow exists a PAM version for high voltage (24v) or just a chinese clone hard limited in current.
(Btw the link you shown have the real 3116D2, it can be seen from the vias on the underside of the board; also the reviews are ok)
(Btw the link you shown have the real 3116D2, it can be seen from the vias on the underside of the board; also the reviews are ok)