Hugh Robjohns wrote:James Perrett wrote:I haven't gone through the rest of the circuit to find out why they need such large values but presumably there's a large inrush current on power up or high peak currents.
From page 26 of the user manual:For European Model
Purchaser/User Information specified in EN55103-1 and EN55103-2.
Inrush Current: 85A
Conformed Environment: E1, E2, E3 and E4
I wonder how long that current lasts? If it is more than 10ms the fuse should blow (although the fuse is only rated at a max interrupt current of 40A). There's around 32000uF of smoothing capacitors in there which will certainly draw a fair amount of current while charging up.