Lme49830

[bobodioulasso]

Finally i think that in the doubt , it is a better choice to connect pin 3 to input/clean ground: little current will flow there, so, the risk to pollute this ground is small. In AN, they even permit themselves to use this ground for decoupling the LME supplies for the same reason i suppose. At the opposite, if you connect pin 3 to dirty ground, the risk to pollute the input stage ground with high current is big.
Forgive my english

[bobodioulasso]

i found this that contradicts what i just said scroll down)

http://home.mira.net/~gnb/audio/lm4702.html

I find a good idea to connect separately pin 3 to the star ground.

[pacificblue]

Originally posted by Segran
It would be nice if anyone with the appropriate measuring equipment can quantify the difference.

http://www.diyaudio.com/forums/showt...60#post1716260

[morsenuc]

I have finished a four-channel version of the lme49830/IRFP240/9240 with a "Green" feature. Exploiting the dual-voltage transformers available, I can switch between 22 volts and 44 on the rails with a constant 8 volt oversupply for the chip's power. I added an optoisolator with a 100K resistor in series and apply that to the base and collector of the Vbe multiplier. In the Green setting, the amp idles at 40 mA with the 22 volt rails, i.e. less than two watts per unit. In the hot mode it runs at 200 mA and 44 volts or the rails, for quite a bit more standby power. The idea here is to have the option for no-holds-barred performance, but leave the amp on for background music most of the time. The green mode is enough power and low enough distortion for all but the most demanding applications, given efficient speakers.

[AndrewT]

Originally posted by morsenuc
I have finished a four-channel version of the lme49830/IRFP240/9240 with a "Green" feature. Exploiting the dual-voltage transformers

A manually activated ClassG amplifier.
What a nice idea.
Let's all go green.