Hi everyone,
can someone please explain something to me.
If you look at the discussion above we seem to work on R17 but what about R20 ?
So I measured and found out those 2 are the 2 resistors which do run parallel. But when you replace both let's say with 1.8Kohm which should result in the same result like discussed above suddenly with the proper settings :
150 MhZ
0.65 V
it consume suddenly 900Watt of the wall. Anyone any explanation about this?
Thank you
Lumanet
R17 & R20 are not in parallel. R17 goes from the Buck Converter Output voltage to the VFB input. R20 goes from the VFB input to ground. R17 is the one to adjust or change.
Also remember you need to make the same change on the other 7 resistors on the other Buck Converters, then repeat for the second board.
Rich
I just swapped out the R17 resistor and it's partners against 1Kohm 1% SMD resistors and now I am hashing like it should be :