Hello guy, I found new TPA3255 amp on ali. What do you think about?
TPA3255 Dual channel Class D digital power amplifier board DC24 48v high power output 300W + 300W|Amplifier| - AliExpress
It its very cheap. I don't know if I should buy one for test^^
TPA3255 Dual channel Class D digital power amplifier board DC24 48v high power output 300W + 300W|Amplifier| - AliExpress
It its very cheap. I don't know if I should buy one for test^^
Problem solved ^^
LM2575HV was soldered ... it should Work with 48V
But Diode is a 40v Type . 1N5819
New Power supply .. 45V
Manufacturerof amplifier Said 24-48V !!! ... So i use 45V ....
Lm2575 Power supply killed
TPA Chip killed
Both 3,3V LDOs killed
PCM5102 killed
QCC5125 Bluetooth Module killed
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Hello,
I bought this board to use as external amp for my avr.
The thing is, it looks like the input has very low sensitivity.
Any one experienced this kind of low output at the same input level.
Other question, this board has a very light hiss which I can ear if I am very close to the speakers. This might be some kind of PSU issue? I'm using an old hp laptop PSU with 19v and 7amp.
Are the 2 "problems" related to the PSU?
The board I have is this one:
TPA3255 2.0 Class D digital power amplifier board high power 300W+300W|Amplifier| - AliExpress
I bought this board to use as external amp for my avr.
The thing is, it looks like the input has very low sensitivity.
Any one experienced this kind of low output at the same input level.
Other question, this board has a very light hiss which I can ear if I am very close to the speakers. This might be some kind of PSU issue? I'm using an old hp laptop PSU with 19v and 7amp.
Are the 2 "problems" related to the PSU?
The board I have is this one:
TPA3255 2.0 Class D digital power amplifier board high power 300W+300W|Amplifier| - AliExpress
BRZHIFI TPA3255 amplifier
A good day to all!
I have a BRZFiHi TPA3255 amplifier and I encountered a rather curious problem which I couldn't figure out.
The amp has 3 nos. opamps in it and they are fitted with JRC5532. I presume 2 are for the BTL config and 1 is for gain stage.
Since I have 4 nos. LM4562, I wanted to see if there would be any noticable difference if I replace them.
Replacing all the 5532 with 4562, there was no ouput to the spkrs.
I thought it could be a faulty 4562. So I randomly removed and fitted back 2 5532 and it was alive again.
To cut the long story short, after fiddling with different combi of opamps at different DIP8 slots, I discovered that I could use ONLY TWO 4562 at any one time. If I use, say, a LM833 as the third opamp, I can put it into any of the 3 DIP8 slots and it will work just fine. Replaced with a 3rd 4562 and it will be silent.
Any idea what could be the issue?
A good day to all!
I have a BRZFiHi TPA3255 amplifier and I encountered a rather curious problem which I couldn't figure out.
The amp has 3 nos. opamps in it and they are fitted with JRC5532. I presume 2 are for the BTL config and 1 is for gain stage.
Since I have 4 nos. LM4562, I wanted to see if there would be any noticable difference if I replace them.
Replacing all the 5532 with 4562, there was no ouput to the spkrs.
I thought it could be a faulty 4562. So I randomly removed and fitted back 2 5532 and it was alive again.
To cut the long story short, after fiddling with different combi of opamps at different DIP8 slots, I discovered that I could use ONLY TWO 4562 at any one time. If I use, say, a LM833 as the third opamp, I can put it into any of the 3 DIP8 slots and it will work just fine. Replaced with a 3rd 4562 and it will be silent.
Any idea what could be the issue?
Last edited:
The 4562's have a slightly higher current draw than the 5532. The 4562s also have a wider bandwidth 55Mhz vs 10 Mhz. I tried to swap out 5532s in a SMSL dac and I could not do to the slightly higher current draw of the 4562s. If you have a DMM measure the supply voltages on pins 4 and 8 and compare. Also check the output pins on pin 1 and 6. It may give you a clue.
thank you for the enlightenment.
will try to measure the pins later. need to insulate my probes before poking at the components coz there are quite a number of bare metal smt caps around and I don't want to short anything if my probes slip
Simple circuit to avoid pops with the EAUMT-0260
Couldn't find this in the discussion about the 3e Audio board, so I thought this might be of use for someone. It is a simple interface between a µC and the amp which ensures mute while the µC is down while the amp is (already/still) up.
Cheers
Couldn't find this in the discussion about the 3e Audio board, so I thought this might be of use for someone. It is a simple interface between a µC and the amp which ensures mute while the µC is down while the amp is (already/still) up.
Cheers
Attachments
For example something like this:
Zasilacz impulsowy 36V 360W 10A CNC LED Reprap - Sklep internetowy AGD i RTV - Allegro.pl
I read in the descriptions here that a power supply with two outputs is not suitable. How to understand?
Zasilacz impulsowy 36V 360W 10A CNC LED Reprap - Sklep internetowy AGD i RTV - Allegro.pl
I read in the descriptions here that a power supply with two outputs is not suitable. How to understand?
