TPA3255 - all about DIY, Discussion, Design etc
- Thread starter Capt Grogg
- Start date
Intresting dual 3255 board
https://a.aliexpress.com/_mPyYgpS
https://a.aliexpress.com/_mPyYgpS
Just change to 12s and you should be ok. You can always use a combo that gets about 12v and then go to a DCDC step up to get regulated 51.5v even as cells drain and voltage changes. I have used the 10A (red PCB) DCDC units from Aliexpress (shown earlier in this thread) with success. I ran it from 12v Pb-acid UPS backup battery.
just this Mod for this 3255 board??I bought this TPA3255 Board.
View attachment 1240285
Four capacitors beside heatsink are series-connected 4700uF/25V.
So a total of 4350uF capacitance is embedded.
It's not a good idea from the point of view ESR.
By the way, another complaint...
The speaker output makes a pop noise during Power-up and Power-down. So I developed an automatic reset control circuit.
This can eliminate pop sound without manual reset switch control operations.
View attachment 1240288
Hope this will help you easier.
CyberPIt
Sound-related modification is yes.
Other modifications are adding LED drivers for CLIP(RED, pin21), FAULT(BLUE, pin19), and GVDD Power(GREEN).
Yes i could use 12S but i find better and cheaper charger for 13S thats why i actually want to use 13s. I have step up converter 500W from wondom. But it does use 12W in idle mode. therefore its not very efficient. i want to get most out of battery
i know 53.5V on 6ohm. i will use 4ohm driver. but the specs does also say, that it can handle 69V (or 63V) before damage. so i wonder i can use 54.6V for short term before battery start loose its max current...
I purchased the ZK-3002 amp, it is the updated board, and am using with a Noyito 48v 4a (192w) rated 5a (240w) max (WX-DC4816). It's connected to a JBL Sub 145 (8" ported enclosure) in place of the failed 100w plate amp that i'm the process of repairing. In this example also have it connected to a low-pass subwoofer pre-am board that is being powered by a 12v DC power board. This is just a mockup test and does get very loud that my wife complains of the vibration so I have to turn the volume down to not disturb her.
Any long term success stories using the auctionsite 3255 boards?
I have a 1kva 32-0-32 transformer here and a buddy who needs a big cheap amp for his pa party speakers.
Almost bought the one with the series power supply capacitors, then decided to do a search first. Seems they mostly all have issues.
I have a 1kva 32-0-32 transformer here and a buddy who needs a big cheap amp for his pa party speakers.
Almost bought the one with the series power supply capacitors, then decided to do a search first. Seems they mostly all have issues.
hi，hansueli
I saw it in the data book that the magnification（NE5532） of the device is 1。(R8/R7)×（R41/R42）=1.
So why do I need it? If there is no amplification, can I remove it?
I would appreciate it if you would kindly enlighten me.
hi,
I am thinking on building a TPA3255 board - well, a few of them for a multichannel system - based on the eval board.
What prevents the project from being economically viable are the inductors. I have not read through the 254 pages of this thread but i searched a bit and couldn't find an answer to my question:
have inductors been identified that are significantly cheaper than the coilcraft & co. and proven to give similar performance?
thanks a lot!
I am thinking on building a TPA3255 board - well, a few of them for a multichannel system - based on the eval board.
What prevents the project from being economically viable are the inductors. I have not read through the 254 pages of this thread but i searched a bit and couldn't find an answer to my question:
have inductors been identified that are significantly cheaper than the coilcraft & co. and proven to give similar performance?
thanks a lot!