TDA2030/TDA2040 frying after 10 secs of use?

[itakenocrud]

I built the tda2030 and tda2040 test circuits and I am just frying these chips right and left. Anyone come across this?

I am giving the tda2030 0V to 30V and the tda2040 -15V to 15V. So I am giving them a lot of juice, but they dont draw that much current. The power supply reads 700mAmps for the first and 1.7 Amps for the latter.

[Minion]

What do you mean by frying ?? How big is your heatsink ??

[richie00boy]

Sounds like they are oscillating.

[DigitalJunkie]

x2 on the oscillation.
They should draw very little current at 'idle'.Check the data sheet for specific numbers.

[sivan_and]

short the input and measure the idle current should be 50 ma or less !!

[Puffin]

I thought the max voltage for TDA2030 was + - 18v?

http://www.datasheetcatalog.org/data...onics/1458.pdf

[richie00boy]

Originally Posted by Puffin

I thought the max voltage for TDA2030 was + - 18v?

http://www.datasheetcatalog.org/data...onics/1458.pdf

Which is a bit above the voltage he was giving it so will be fine.

[DigitalJunkie]

+/-18,or 36V from a single-ended supply.

[danielwritesbac]

Originally Posted by itakenocrud

I built the tda2030 and tda2040 test circuits and I am just frying these chips right and left. Anyone come across this?

I am giving the tda2030 0V to 30V and the tda2040 -15V to 15V. So I am giving them a lot of juice, but they dont draw that much current. The power supply reads 700mAmps for the first and 1.7 Amps for the latter.

Do you have a TO220 size mica and a shoulder washer?