the IC is a very nice circuit, unfortunately the LME is obsolete since not so long time 🙁 seems that TI wanted to sell more of their own class D solutions instead of the old school class AB circuit... i designed an amplifier with the LME which is going 6 times in a dsp based 6 channel active speaker system 🙂 but with my own pcb layout. good that i have saved some spare parts when i designed them 3 years ago...
Hi...I know this is old thred
I have planning to build this Lme49830 with a pair K1058 J162, I use toroid talema 2x25volt 225va, how the output will be? Thanks for answer..
I have planning to build this Lme49830 with a pair K1058 J162, I use toroid talema 2x25volt 225va, how the output will be? Thanks for answer..
LM49830 --- how much current needs
hi,
how much Ampere the power supply needs to make this integrated (LM49830) work well ?😕
Thank you very much for your help...
Cesare
hi,
how much Ampere the power supply needs to make this integrated (LM49830) work well ?😕
Thank you very much for your help...
Cesare
The power requirements for the transformer is dependent on your final design. 25 watt output 100 watt output 150 watt output, mono, stereo, 5 channel? 4 ohm 8ohm?
I used a transformer from an old Kenwood stereo amplifier.
I used a transformer from an old Kenwood stereo amplifier.
HI, thank you for your kind reply
yes ok
but I'm interested know how much current (LM49830) use the integrated for work???
something like ( drive current, 56mA ) for work +/- at 62Vdc😕
…
Thankks....... Cesare..........by Venice
yes ok
but I'm interested know how much current (LM49830) use the integrated for work???
something like ( drive current, 56mA ) for work +/- at 62Vdc😕
…
Thankks....... Cesare..........by Venice
from the data sheet Idle current is around 19 ma typical max is 24 ma with no load.
from the data sheet max output current is 54 ma
so worst case 24 + 54 ma
here is the data sheet
from the data sheet max output current is 54 ma
so worst case 24 + 54 ma
here is the data sheet
so with a 30VA(ma650X2) transformer I'm more than safe.
Many thanks "multisync".....
have a good day.......... Cesare from Venice
Dear All,
How to setting bias LME49830 based on this schematic, I use a pair mosfet 2SK1058/2SJ162.
How to setting bias LME49830 based on this schematic, I use a pair mosfet 2SK1058/2SJ162.
An externally hosted image should be here but it was not working when we last tested it.
Hi Toni, I have finished your SA2012 power amp using your pcb boards and I have a question please.
I am using +- 74Vdc lines, if biasing the fets using a 1.0 ohm resistor in series to the rails what is the desirable voltage drop across it?
I've seen that you're mentioning biasing at 250-300mA but it seemed a lot to me that is why I asked.
If I bias the fets at 100-120mA shall I get higher crossover distortion or what?
If I bias the fets at 100-120mA shall I get higher crossover distortion or what?
Last edited: