LAB.Gruppen FP3400

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#84
class d

ir 2000 amplifier detex audio
 

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#90
Rembulan said:
I have seen the schematic from FP3400 many many times but the power supply design is still made me confuse, why lab gruppen use a flyback design for their PS any advantage over full bridge ?
Click to expand...

They use IGBT transistors in the power supply (sure, you know about advantages of these: high voltage, high current, high power, low resistance). But it is too problematic to bridge the IGBT's (because of their saturation). At least it is needed to use the resonant switching mode then, and this makes the PS more complex. Whereas the most disadvantage of the flyback mode is a double size of the output transformer (which can be still solved by increasing of the switching freq). 🙄
Although, I wonder, why they do not have the PFC stage in their amps... 14 KW amp will draw such a huge pulses from the mains... :hot:
 
#94
peranders said:
Noticed that there is the same picture for all models? :scratch:
Click to expand...

I have found only small differences in FP and C series too:
http://www.labgruppen.com/downloads/product/FP10000Q_inside_lowres.jpg
http://www.labgruppen.com/downloads/product/C_Series_inside_lowres.jpg

But it is simple to explain from marketing point of view: why it is needed to develop completely new schematic/layout for each amp, where it is possible to simply vary the PSU output voltage and sell the "same" amp rated for different power and having other (lower?) price... 🙂 So, maybe FP3400 generally is the same FP14000, where the PSU has a half of output voltage/power... 🙄

😉
 
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