TO-39 style NE5534

[bluebird]

I found some TO39-/TO-18 (metal transistor can) type NE5534's in an old distribution amp. they were powered by +/- 20V and had big heat sink crowns on them. they drive the output transformers.

Are these any different that newer chip styles?

 

[gyraf]

Nope.

 

[NewYorkDave]

...but the package style is very convenient for heatsinking, that's for sure.

I wouldn't think of running a DIP-8 version of 5532 at +/-20V. It'd burn up.

 

[rafafredd]

I´ve seen 5534s at +-22v. They get a little hot, but works ok. No burns.

 

[Svart]

thermal glue and a heatsink? i wonder...

 

[SonsOfThunder]

[quote author="Svart"]thermal glue and a heatsink?[/quote]That will certainly help on a plastic DIP, but there is going to be nothing better than the heat transfer that you'd get from a metal case since the die is bonded to the metal can. The thermal resistance of the plastic is quite a bit higher.

HTH!
Charlie

 

[Guest]

[quote author="SonsOfThunder"][quote author="Svart"]thermal glue and a heatsink?[/quote]That will certainly help on a plastic DIP, [/quote]

What about mill bottom of the DIP. There must be Cu
plate for chip housing. And if you put heatsing to the bottom
with silicone fet, you can obtain some as watt...

But there are two types of attaching chips, Gold-Si solder and conductive epoxy gluing. The second is commonly used for low-power chips
without heatsink.

And what about chip buying? Minimal order of 5534Y from TI ?
I don t know, 1 000 000 ? , What about free samples ?
Then you can put it on the modified TO220, and contact it
with a gold wire...

Ha, ha, ha,... There was one man who live in the house in my town,
and this man build factory, and this man died. And factory is
still producing ... under mark ON SEMICONDUCTOR.

Someone from us can make similar nice story, to start with
TO220 5534s ?

xvlk

 

[magicchord]

My 1983 ADM console is full of those - 5534s and LF356s in round metal cans. When I want to try different chips I have to use these TO-to-DIP adapters made by Aries. DigiKey sells 'em, and they're like $6 each.

And they don't always fit on the circuit board (