class d chip amp

[sagarverma]

hi
anyone built a class d chip amp.
i want a chip and not discrete amp.

help req

[bigmike216]

take a look at the phillips TDA8920.

[Ouroboros]

If you're happy using very small SM packages, then here at work we get good results from the chips from MPS, but they are only low power devices.
The new MP7722 is 2 x 20W into 4 Ohms for example.

[sagarverma]

i need a chip with heavy o/p power.not 20w or so bec i have built tda7294 based amps as well as lm ones.they are themselves cheap but demand monsterous heatsinks which r very costly.
so iwant class d to get great power really cheap

please advise

[homer09]

hey sagarverma,

u helped me with the smps remember? well i mite be able to help u now. the most advanced class-d chips are from www.tripath.com

check them out, and www.41hz.com sells kits with those chips.

im posting a question about the smps you could answer for me please? 6 channel class-d amp for car, need guidance...

[sagarverma]

hi homer09
thanks for reply

i have already replied to your post.u construct smps.i will extend all help possible(this is the motive of this great website,right! :-) )

checking the links from u.

[sagarverma]

good links.

but anyone with experience in building class d chip amp?

[homer09]

i think you should have a mod move this to the class-d forum for better answers? i think most people in chip amps deal with class AB.

[sagarverma]

but there no one replied.i suppose all interested there in discrete amps that i hate like anything(too big)

[homer09]

Originally posted by sagarverma
but there no one replied.i suppose all interested there in discrete amps that i hate like anything(too big)

you are so right. anyone using chips on the forum is either upgrading the little sonic t-amp or they are using a kit from www.41hz.com

anyone actually building something is doing it desecrete which i believe is very courageous, but the effort outways the gains.


once my smps is done, my next step will be a 6channel class-d chip amp. im looking at using a tripath chip. im thinking of either just ordering 3 stereo kits from www.41hz.com or i will build the application circuit suggested in the datasheet of the chip. i mean the 41hz kits are just direct copies of the circuit you find in the datasheet.

so it will come down to a question of cost and being able to source parts. im yet to find a source for tripath chips

check out the TA2022 on tripath site. it seems the easiest one to implement.

we are on the same path, so lets help each other out!