F
Franc Zabkar
- Jan 1, 1970
- 0
I have a generic "400W" ATX PSU which I suspect is a fake. This is its
circuit diagram:
"LC-B250ATX ch. Y-B200-ATX ver. 2.9 JNC Computer Co."
http://electro-tech.narod.ru/schematics/power/JNC_Y-B200-ATX.zip
The label on the cover reads as follows:
L&C Technology Inc
Model: LC-B400ATX
+3.3V +5V +12V -12V -5V +5VSB
28A 40A 17A 0.8A 0.3A 2A
+5V & +3.3V combined load 220W
+5V & +3.3V & +12V combined load 380W
Total output is 400W max.
The +3.3V and +5V rails are each rectified by a S10C40C dual diode,
and the +12V rail is rectified by two FR302 fast recovery diodes.
According to their datasheets, the FR302 is rated at 3A, and the
S10C40C is rated for 10A.
http://www.mospec.com.tw/pdf/fast/FR301-FR307.pdf
http://www.mospec.com.tw/pdf/schottky/S10C30CE-S10C60CE.pdf
Printed on the PCB is the following legend:
F5A/250V (for 180W -- 235W)
F7A/250V (for 300W -- 350W)
F6.3A/250V (for 250W)
The fuse is 5A. :-(
The PCB is labelled "Y-B200 ATX Ver 2.8" which also suggests a 200W
rating.
Can anyone offer an opinion as to the real rating of this PSU? How do
the diode ratings in the push pull converter affect the PSU spec? Can
one assume that the total wattage is close enough to ...
Pt = (3.3 x 10) + (5 x 10) + (12 x 6) + (5VSB x 2) + (-5/-12 wattage)
= 175W approx
- Franc Zabkar
circuit diagram:
"LC-B250ATX ch. Y-B200-ATX ver. 2.9 JNC Computer Co."
http://electro-tech.narod.ru/schematics/power/JNC_Y-B200-ATX.zip
The label on the cover reads as follows:
L&C Technology Inc
Model: LC-B400ATX
+3.3V +5V +12V -12V -5V +5VSB
28A 40A 17A 0.8A 0.3A 2A
+5V & +3.3V combined load 220W
+5V & +3.3V & +12V combined load 380W
Total output is 400W max.
The +3.3V and +5V rails are each rectified by a S10C40C dual diode,
and the +12V rail is rectified by two FR302 fast recovery diodes.
According to their datasheets, the FR302 is rated at 3A, and the
S10C40C is rated for 10A.
http://www.mospec.com.tw/pdf/fast/FR301-FR307.pdf
http://www.mospec.com.tw/pdf/schottky/S10C30CE-S10C60CE.pdf
Printed on the PCB is the following legend:
F5A/250V (for 180W -- 235W)
F7A/250V (for 300W -- 350W)
F6.3A/250V (for 250W)
The fuse is 5A. :-(
The PCB is labelled "Y-B200 ATX Ver 2.8" which also suggests a 200W
rating.
Can anyone offer an opinion as to the real rating of this PSU? How do
the diode ratings in the push pull converter affect the PSU spec? Can
one assume that the total wattage is close enough to ...
Pt = (3.3 x 10) + (5 x 10) + (12 x 6) + (5VSB x 2) + (-5/-12 wattage)
= 175W approx
- Franc Zabkar