I am interested in building a 4 channel amplifier (for biamping with active crossover) based on the lme49810 driver IC, of which i have a few. Some time ago there were a bunch of projects based on this IC with PCBs available to buy but being a discontinued part they all seem to have evaporated. The only remaining pcbs i can find are Chinese kits which are either silly 300w things, or more appropriately sized but suspiciously simple looking. They also come as a full kit (usually excluding the 49810) of parts i wouldn't trust which doesn't make it an attractive proposition
Does anyone know of any reputable projects based on this IC either still selling PCBs, or with pcb artwork available that could be sent off to one of the PCB houses to reproduce?
Does anyone know of any reputable projects based on this IC either still selling PCBs, or with pcb artwork available that could be sent off to one of the PCB houses to reproduce?
Buildaudioamps has a LME49811 project, with PCB. Maybe you can adapt it to the LME49810.
I always wanted to build one of these guys out of my stash iether bjt or mosfet but never got around to it.
I always wanted to build one of these guys out of my stash iether bjt or mosfet but never got around to it.
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Triode is recommended.
IC is not cost-effective. As long as the design is excellent. Transistors work well.
Like this amplifier. Use Douglas circuit.
Including transistors. Stereo channel. The price is about $10.
It adopts the same output structure as LME49810.
IC is not cost-effective. As long as the design is excellent. Transistors work well.
Like this amplifier. Use Douglas circuit.
Including transistors. Stereo channel. The price is about $10.
It adopts the same output structure as LME49810.
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@jacques antoine Thanks for the link, yeah he has a few projects based on these parts. shame his pcb artworks are aimed at home production and not suitable for giving to someone like pcbway or jlcpcb. maybe i will ask him for the original files
@ljm_ljm I already have a load of 49810, so they are very cost effective. I'm really looking for a way to use them up, not just build another discrete amplifier.
@ljm_ljm I already have a load of 49810, so they are very cost effective. I'm really looking for a way to use them up, not just build another discrete amplifier.
I see. There is really no need to waste with 49810 IC.
I also made LME49810
Its performance is OK. But the index of IC is not equal to that of amplifier.
Generally speaking, the performance index of amplifier is lower than that of IC. Because PCB capacitors will produce certain distortion.
The distortion of the amplifier is mainly caused by the output stage. 49810 is not very meaningful.
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tolerable. You can tell me the email address.
In addition, 49810 49811 49830 is not universal. I suggest you redesign.
It's very simple
There seems to be something wrong with your design back then.
I clearly remember that this IC reached THD+N 1kHz 0.000X%@ 80kHz LPF 20Vrms on a test board with 8R load,
instead of 0.00X% 😛
yes. I also know that the nominal data of IC is 0.0006%.
But it's useless.
IC is not an amplifier. The amplifier includes PCB, resistor and capacitor. And power supply.