Don't know where to post this
What would you classify this type of TPA3255 board? Anyone have any experience with this 4 channel board? I want to make a 2-way active amplifier.
What would you classify this type of TPA3255 board? Anyone have any experience with this 4 channel board? I want to make a 2-way active amplifier.
This module is not so bad. It is one of the rare module using 4X Balanced inputs.
The Buffer caps are a bit cheap (basic SMD type).
Power caps are Panasonic FC.
Inductors are Sagami.
OP amps are SOIC8 type, not updtable
If you add a good LLC PSU, you can get a decent amp
Thank you for your input. Any recommendations for a good LLC PSU that could run this? A lot of the LLC psu I'm finding are dual output and not single ended. I'm really only hoping to get 100w x 4 @ ohm out of it. Would it be worth my time to upgrade the caps?
Two options here :
1) Get a great Connex LLC SMPS 300RS 36V (Single rail only) with a good AC filter see below the one I built (36V / 8.3A)
(TPA325X show the best THD+N figure @ 36 / 38V)
Review :
https://hifiduino.wordpress.com/2012/04/23/connex-smps300re/
2) Get a this PSU with an active PFC and decent Ripple ( 36V / 11A : https://fr.aliexpress.com/item/1005...o2fra&spm=a2g0o.order_list.0.0.21ef5e5bEPcT6O)
PS : as soon as my PFC PSU is finished, I will share you some pictures )
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Can't edit my previous comment, what is an acceptable amount of ripple? What should I be looking for?
PFC (power factor correction or power factor controller). minimizes the amount of reactive power produced. it ensures power distribution to the devices connected to the power supply is efficient. There are two types of PFC: Active PFC and Passive PFC. : Active PFC uses electronic circuits in efficiently distributing power to devices connected. Active PFC is able to generate a theoretical power factor of over 95%... theoretically I said )
I would say less than 200mv should be acceptable for the ripple....
I would say less than 200mv should be acceptable for the ripple....
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Thank you. I'll update the thread when I get the 4 channel, suitable psu, and DSP.
Take care. There is the same one in Aliexpress without PFC. Make sure to get the right model )
PFC active is rated @400w 36v / 11a (you clearly see the PFC chip in the pictures)
PS : your link is down....
PFC active is rated @400w 36v / 11a (you clearly see the PFC chip in the pictures)
PS : your link is down....
Fixed. I bought two of the psu for active monitors. They don't have PFC. Now am I want another PSU for the Tpa3255 4 channel.
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Got it ) Give a try to the one with PFC instead ) Or if you have a bigger budget, go with the Connex 300RS.
Another option should be the RACM230-36SG, this PSU was advised by Orchard Audio in particular for the Gan Bosc modules
It also has a PFC LLC controller inside but @ only 230W (36V / 6.3A)
https://www.mouser.fr/ProductDetail/RECOM-Power/RACM230-36SG?qs=sPbYRqrBIVmyD15V3ihsag==
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How would you compare this aiyima 4 channel amp with this 4 channel amp? They are about the same price. The latter is physically bigger and may be hard to find a case.
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Hey guys! I am about to build a TPA3255 amp using a board from AliExpress. I will be using 2 x SMPS, one 12VDC for speaker protection and one 36VDC for amplifier. In total I will have 4 boards mounted to a metal case using brass standoffs. Checking for continuity/connection between mounting holes and GND - none of them are connected apart from the TPA3255 AMP board. When mounted to a bottom of the case, it's 36VDC GND line will be directly connected to the chassis. Would I still be connecting 115VAC earth to the chassis? since it would be directly connected to each other using chassis. Should I just run 2 wires, hot and cold for the 230VAC and not ground/do not connect 115VAC earth line at all? I feel like mixing 115VAC and 36VDC GND sounds like a very bad idea. But maybe it is okay to do and should be done that way? Thank you in advance.
Hi, which TPA3255 module ? and the same for the PSU ? So we can help )
PS : keep in mind, you need a Single rail PSU, LLC or with Active PFC are great .
PS 2 : most of TPA325X modules are well protected and have anti pop @ startup, you don't need a speaker protection.