TDA8950 ClassD chip.

[ashok]

Anyone tried the NXP TDA8950 chip ?
If so how is the sound compared to Tripath or Hypex ?

[Rodo]

Hi. Somebody got any TDA8950??? I can't find it or TDA8920C.
Rodo

[Davey T]

I have ten TDA8920's i ordered from digikey a while back. Haven't had time to design the pcbs and test them, but it seems fairly straight forward.

I found someone who has used them and they passed me their artwork designs, but i want to do my own neater sm version.

They look good. I was planning to use them in a 12"/1" battery powered speaker running from 10s of lipos or 4x 12v SLAs.

[Neil Davis]

Originally posted by Davey T
I found someone who has used them and they passed me their artwork designs, but i want to do my own neater sm version.

I've got the ExpressPCB files and parts list for the TDA8920 circuit in the picture. It's the same layout as in one of the data sheets, except it is hard-wired in bridge mode, and it includes the power supply. Send email if you are interested and I'll respond when I get back home.

[Rodo]

I made a board based on TDA8920B schematic in datasheet. Since I used most components trough hole but 100nF caps and TDA8920BTH (all SMD), I made a single side board. No noise or EMI problems using just a heatsink (a piece of plane aluminium) conected to GND. Also, I used jumpers to select BTL or SE configuration.
At present NXP recomends a new schematic (simplified one) for TDA8920C and TDA8950. It seams to be propper for 8920B too. Did anybody test the new schematic with 8920B? Thanks, Rodolfo

[yumbrad]

Do you know the difference in the new recommended schematic?

Also, would the 8950 be overkill, one per speaker in BTL mode, for a surround home theater setup? Perhaps the 8920 would be more than enough?

[Rodo]

I could send you datasheets to you to see changes. Ask me by mail to rodolfo@kashima.com.ar.
Class D amplifiers are most usefull for cases in that you need small heatsinks or just large efficience. Have in mind for a home theater some NXP's AB amplifiers may be a better option because quality and an easyer build. Anyway in BTL conf. TDA8920B is more than enough for that you are looking for.

[lumanauw]

Who is selling TDA8950? Digikey and Mouser don't have them yet.

[quadtech]

Rodo, do you mind posting your PCB files? Many may find it useful.

[Neil Davis]

Originally posted by lumanauw
Who is selling TDA8950? Digikey and Mouser don't have them yet.

Avnet lists them for about $6, but they don't show any stock. Also, minimum purchase is 500 units and they don't specify a lead time. Since they don't specify a lead time it may take a while before they show up at Digikey/Mouser.