Can LM3875 blow up?

[zeno]

I blew up one too... I switched (not voluntarily!) + and -.

Smoke and smoke and smoke. But it wasn't good for the brain.

Marc

[orkaniusz]

I connected the ground of my cirquits to chassis of the amplifier. Heatsink has no isolation from chassis, so it has 0V. LMs has Vee on their package and should be well isolated from heatsink. My isolation was not good so between Vee and Gnd I had shortcut.
But I must say I don't know why Vcc pin broke off. Maybe mechanical stress or just heat.

[velikan]

Originally posted by orkaniusz
I connected the ground of my cirquits to chassis of the amplifier. Heatsink has no isolation from chassis, so it has 0V. LMs has Vee on their package and should be well isolated from heatsink. My isolation was not good so between Vee and Gnd I had shortcut.
But I must say I don't know why Vcc pin broke off. Maybe mechanical stress or just heat.

That it! I don'n know why they make it so but at least I know what is the couse and that is driving me crazy!
Yes, on sunday before I power the amp I put ground on amp to avoid some problems with my CDplayer and floating voltage. So, some sort of short circuit happened. I didn't pay attention on the fact that chassis is on -(Vee) so I may accidently done something stupid.

Thank you for clearyfeing the problem.

p.s.
i apollogize for my sppeling

[thomas997]

Originally posted by indoubt
Same here, just swap V- and V+ and they will smoke. Aaah!, don't do your soldering late at night (like I did)

thanks for the warning, I'm always messing around plugging different chips into a test supply..