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Old 10th January 2007, 02:59 PM   #1
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Default opa552 driving opa549s in parallel

Im thinking of using 3 opa549 in parallel(549 application note fig.14) but in instead of using a opa549 to drive the parallel 549s,I will use the 552 in the feedback loop with a gain of 10.

See any problems?
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Old 13th February 2007, 06:42 PM   #2
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What do you think, of the circuits under "inceasing output current"(opa552 datasheet)

figure 9 and 10. It says you can use the opa549 instead transistors.
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Old 15th February 2007, 12:31 AM   #3
CarlosT is offline CarlosT  United States
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Aren't the OPA549s not already high current?

How 'bout using a 551 at unity and then the 549s parallel but inverted? Hhhhmmm...
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Old 15th February 2007, 02:25 PM   #4
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Quote:
Originally posted by CarlosT
Aren't the OPA549s not already high current?
The OPA549 puts out 8amps with a 10amp peak not as high as the lm3886.
Quote:
Originally posted by CarlosT

How 'bout using a 551 at unity and then the 549s parallel but inverted? Hhhhmmm...
Rigth now, I only have the OPA552 (not unity stable). Anyway with the 551 in unity, all the gain would be on the OPA549. I match gain (13.75) levels of all my amps, the OPA549 would be passed the recommended gain max of 10

Iím really not sure how I will configure the amp, so I will use IC socket pin to make changes if necessary
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