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LM386 problems
LM386 problems
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Old 9th January 2010, 06:39 PM   #1
way2manythings2 is offline way2manythings2
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Join Date: Jan 2010
Default LM386 problems


Looking for some advice on a problem I am having with the LM386. I am driving a earphone with an impedence of 150 ohms at 1 kHz. The device is well within the thermal disapation for the part. I am seeing this part fail, as it will clip of the positive cycle of the sine wave only, well before I reach the positive rail. This does not happen on all op amps. The bad op amps also draw more Q current than the data sheet states. The part does still work, although distortion is a lot higher, since I am clipping on the positive rail. I do have some small positive offset.
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Old 10th January 2010, 10:13 PM   #2
djoffe is offline djoffe  United States
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Default please post a schematic

too many guesses without looking at your schematic...
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Old 15th January 2010, 08:32 PM   #3
gfiandy is offline gfiandy  United Kingdom
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It may be unstable, try improving the power supply decoupling.

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