using ta2021b in the si t-amp

[v-bro]

I was wondering if anyone can tell me if it is possible to install the Tripath TA2021B chip in my(already hastedly ordered) Sonic Impact T-amp?

I studied the test/application circuit in both TA2024 and TA2021B's datasheet and eccept for a few minor differences in the filtering circuit it all looks very similar.

Or would it be wiser to order an amp3 from 41hz and sell my
T-amp straight away?

[phn]

Without looking at the specs I wouldn't try replace the chip. Better take the losses and go with the 41hz kit if that's what you want.

My 2 cents.

[BWRX]

Can't do it. The pinouts are different because the TA2021B package is the slug up version of the TA2024. There's no point in swapping those chips anyway. They're probably exactly the same internally.

[v-bro]

thanx for the early reply,
thought it would be a tough job changing the chip anyway, and indeed not hard to find anyone interested in the T-amp....

[v-bro]

tnx fo' the reply bwrx(see your name everywhere, you must be a class d deciple indeed...).

After what I read about both chips is they're probably almost the same inside indeed, only TA2021B has better heat dissipation and is therefore more capable of handling higher voltages, right?

I've just received my package with the t-amp from "thinkgeek",
tested it on my ni-cad 12 volt battery(5 amps), sound is very good, but the chip(yes, already opened the amp...) gets pretty hot, I use 8-ohm whizzer coned fullrange speakers, battery measures 13.45 volts without load. May this be to high, and does the chip therefore need an extra heatsink?

Is it possible to connect a higher voltage to the chip(latest version, only bottom slug) if I mount extra cooling, to get a bit more output power? Like for instance put heat sink paste on the top and mount an aluminum sink, or solder an extra bit of copper plating underneath?

[BWRX]

Originally posted by v-bro
After what I read about both chips is they're probably almost the same inside indeed, only TA2021B has better heat dissipation and is therefore more capable of handling higher voltages, right?

Correct.

Originally posted by v-bro
I've just received my package with the t-amp from "thinkgeek",
tested it on my ni-cad 12 volt battery(5 amps), sound is very good, but the chip(yes, already opened the amp...) gets pretty hot, I use 8-ohm whizzer coned fullrange speakers, battery measures 13.45 volts without load. May this be to high, and does the chip therefore need an extra heatsink?

The chips will dissipate more power at higher voltages (about 14V is the recommended maximum). Any extra heatsinking for the chip would be advantageous.

Originally posted by v-bro
Is it possible to connect a higher voltage to the chip(latest version, only bottom slug) if I mount extra cooling, to get a bit more output power? Like for instance put heat sink paste on the top and mount an aluminum sink, or solder an extra bit of copper plating underneath?

Sure. In fact some people do that. The best solution is just to use the TA2021B chip from the start!