On 23 Dec 2005 at 16:00, John Waters wrote:
> I'm try to use LM380 to drive a load but encountered some problems. The 
> circuit is a very standard one with a capacitor in the input and a capacitor 
> in the output to block the dc,  I  used a function generator to apply a 
> sinewave to the input, but found that the output would very easily get 
> clipped (unless the input signal is very very low in amplitude). the maximum 
> p-p amplitude of the output signal is 4 volts while my Vs is at 12V dc. I 
> tried all frequencies from 20Hz to 1KHz, the result is the same. Is there 
> any way I can get an output sinewave without clipping for higher than 4 volt 
> p-p, preferablly close to the supply voltage (i.e. 12V)?

Hi John,

Can the power supply deliver enough current?

Is your load too much(1.5 amps limit or thereabouts?)

LM380 overheating?

Input stage can clip if you use their suggested methods of gain 
control and exceed input common mode range, about .6 volt.

Cheerful regards,

Bob

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