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Chip Amps Amplifiers based on integrated circuits

LM3886 Schematics + PCB
LM3886 Schematics + PCB
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Old 13th January 2018, 05:57 PM   #511
AndrewT is offline AndrewT  Scotland
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Location: Scottish Borders
if the stage ever tries to output a high proportion of high frequencies, then the Output Zobel passes much of this and the Zobel resistor gets hot.
If you test using 10kHz (or higher) squarewave you will probably burn out a 1W Zobel resistor whenever you turn up the signal level.
For testing purposes you need at least 3W and preferably >=5W
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regards Andrew T.
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Old 13th January 2018, 07:09 PM   #512
nirupambhowmick is offline nirupambhowmick  India
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Location: west bengal
Thanks Andrew T for your kind reply.
I just want to make a simple home stereo...
not for testing purpose.
my question was....which one i should use as
jobel resistor?
The parts list and pcb top(apex gainclone 1.0)
has two different value resistor.
Parts list--4R7 1watt
Pcb top--10R 0.5watt.
And please suggest voltage and ampere rating
for 4ohm & 8ohm load both.
Off course for stereo.
Regards.
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Old Yesterday, 08:06 AM   #513
Guitar.mod is offline Guitar.mod  Europe
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Dear nirupambhowmick,

10R and 4R7 both will do the Job.
I would recommend to use 1-2 W. Sometimes 4R7 is more preferable.
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Old Yesterday, 12:17 PM   #514
prasi is offline prasi  India
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LM3886 Schematics + PCB
Quote:
Originally Posted by nirupambhowmick View Post
how much supply voltage & current will be good for 8ohm & 4ohm load?
Regards.
+/-28V for 4 ohm and you can go upto +/-35V for 8ohm.
http://www.ti.com/lit/ds/symlink/lm3886.pdf
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