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Am I driving this chip with too much voltage?

Hacdrag

Member
I'm running some small Amp boards with a 12 V wall adaptor. My multimeter has it outputting 12.38 V. The datasheet for the chip on the board has operating voltage 4V-12V with an absolute maximum rating of 15 V. I've tested it for an hour or so with no problems but am wondering whether I'm pushing the envelope. Am I in danger of releasing some "magic smoke," or in general, are these kind of setups OK?
 

Hacdrag

Member
Do you have a link to the amp?

Mike.
Here is the datasheet for the chip:


Here is the link to the actual product:

 

Dick Cappels

Active Member
Though you exceed the recommended voltage by about 5% (which is not much) you are still a long way from the absolute maximum rating. I think it will be fine.

1653973714135.png
 

audioguru

Well-Known Member
Most Helpful Member
The datasheet of the NJM386 Japanese copy of the American LM386 does not show it with a 12V supply.
The American datasheet shows it heating with 0.8W with a 12V supply when the ambient is air conditioned which will overheat the "DIP8" IC that is rated with 0.7W maximum allowed heating.

It produces almost the same 0,5W of maximum undistorted output with a 9V supply as the 0.6W output with a 12V supply. Use a 9V supply instead.
 

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Hacdrag

Member
The datasheet of the NJM386 Japanese copy of the American LM386 does not show it with a 12V supply.
The American datasheet shows it heating with 0.8W with a 12V supply when the ambient is air conditioned which will overheat the "DIP8" IC that is rated with 0.7W maximum allowed heating.

It produces almost the same 0,5W of maximum undistorted output with a 9V supply as the 0.6W output with a 12V supply. Use a 9V supply instead.
Good idea - better not to release any "magic smoke." :)

Ty
 

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