TPA3255 - all about DIY, Discussion, Design etc

[doctormord]

Thanks.

 

[drauzinho]

IVX and Doctormod, I'm planning on designing a TPA3255 board for my personal use along some DSP / DAC module. Do you guys have any schematic that you're willing to show us here ? It would help me a lot.
Thanks.

 

[IVX]

I didn't play with 3255 yet, and have no plan so far, however, I think 3255+adau1761(5x5mm DSP >>100 stereo parametric EQ, 8mA current, $2)+DAC would be something much better than TAS3251 with very limited and weird DSP on board without 192kHz support.

 

[JMF11]

I didn't play with 3255 yet, and have no plan so far, however, I think 3255+adau1761(5x5mm DSP >>100 stereo parametric EQ, 8mA current, $2)+DAC would be something much better than TAS3251 with very limited and weird DSP on board without 192kHz support.

I understand your message Have to think twice about it. But just to know: how difficult is it to hand solder this LFCSP package ? Same as a TPA3251 / TAS3251 ?


JMF

 

[IVX]

easy, but need to be equipped. Try to get hot air fan for soldering/unsoldering and good iron(I prefer "eddy current" heater 500kHz or so).

 

[JMF11]

I have a basic rework station and a correct iron. How do you proceed ? flux and regular soldering wire ? with soldering paste ?



JMF

 

[IVX]

LFCSP is essentially the same thing as QFN. For the exposed big GND pad I applying a small amount of soldering paste but for aside pins I make balls on PCB pads(soldering wire with BGA flux). Next, I place the IC exactly to its footprint, and hot air(300C) with a minimal air-flow finish the process.
PS: BTW, good idea to buy some kind of teflon tweezers to avoid a stickiness problem(BGA-flux is a sticky grease) during parts populating.

 

[irs20957]

IVX, 1761 replacement at 1701?
Selfboot available?

 

[IVX]

not really replacement yet, no selfboot, 2 ADC instead of 4 as 1701. I hate 1701 because of 200-250mA consumption, for 50MHz DSP it looks like 1995 year. 1761 has a bit more DSP power but eat just 7-10mA.

 

[JMF11]

LFCSP is essentially the same thing as QFN. For the exposed big GND pad I applying a small amount of soldering paste but for aside pins I make balls on PCB pads(soldering wire with BGA flux). Next, I place the IC exactly to its footprint, and hot air(300C) with a minimal air-flow finish the process.
PS: BTW, good idea to buy some kind of teflon tweezers to avoid a stickiness problem(BGA-flux is a sticky grease) during parts populating.

Thanks IVX. Humm looks to ma as doable but sort of black belt 2nd dan soldering task...


JMF

 

[doctormord]

not really replacement yet, no selfboot, 2 ADC instead of 4 as 1701. I hate 1701 because of 200-250mA consumption, for 50MHz DSP it looks like 1995 year. 1761 has a bit more DSP power but eat just 7-10mA.

I don't have this high current consumption on my 1701 implementation, more like 90mA. Even the datasheet lists much less current, so something else seems to be "wrong" with yours.

 

[IVX]

Sorry, probably I mixed up the 1701 and 5558, which is also running crazy hot.

 

[jimk04]

This must have been asked over again but I can't find amongst all the pages if 3255!

Is the Ti EVM appreciably better than 3e or other cheaper boards. I am aware of the Ti 50% off deal.

Is the Ti board difficult to set up with all the jumpers.

I suppose Ti is more adaptable to other configurations because of those jumpers?

Thanks

 

[chermann]

This must have been asked over again but I can't find amongst all the pages if 3255!

Is the Ti EVM appreciably better than 3e or other cheaper boards. I am aware of the Ti 50% off deal.

Is the Ti board difficult to set up with all the jumpers.

I suppose Ti is more adaptable to other configurations because of those jumpers?

Thanks

Hi

the price with 50% to get a TPAEVM board is about 80 Euro unbeatable !!!
better SQ i cant say..

i am playing around with the YJ TPA3255 board to learn and play around. if this is not you passion so buy the TI board and enjoy...if you search and read a lot of guys are satified with the SQ of 3e boards.
dont forget a powerfull power supply + according to the speakers impedance.


no its not difficult to setup the board
a gudie line is existing - read it
the configuration is set up to use rca connection at the beginning

chris

 

[jimk04]

We're you pleased with the YJ board as delivered. ?

I see They are 47gbp now. Modifying one isn't something om too keen on just yet having killed 2 3116 amps recently without really trying!

 

[chermann]

We're you pleased with the YJ board as delivered. ?

I see They are 47gbp now. Modifying one isn't something om too keen on just yet having killed 2 3116 amps recently without really trying!

no......... i start to mod...here:
post #206
What is wrong with TPA3255?

 

[jimk04]

Thank you. And on the psu front for some reason we cannot get lrs-350-48 in the UK so I'm looking into RSP-320-48 or SP-320-48 which is available.

 

[chermann]

Thank you. And on the psu front for some reason we cannot get lrs-350-48 in the UK so I'm looking into RSP-320-48 or SP-320-48 which is available.

i learned that if you use 8 ohm speakers the lrs 350-48 is too weak to push an 8 ohms speaker, because of the max current which you can get --> if you need a lot of power you need...read the thread above...some nice hints from some experts.


for home use ...for me.....its ok

 

[earsofgold]

no......... i start to mod...here:
post #206
What is wrong with TPA3255?

Hey chermann, just letting you know, you can link to the actual post by using the link to the number at the top-right of the post, eg for the one you just mentioned:

What is wrong with TPA3255?

 

[chermann]

Hey chermann, just letting you know, you can link to the actual post by using the link to the number at the top-right of the post, eg for the one you just mentioned:

What is wrong with TPA3255?

Oh...thank you
...i am an old man so...