Hello,
I am designing (with the help of Dallas/Maxim, NXP and LM) new DC-ATX-
PSU's (with 24V DC entry to use it in Photopholtaik-Systems) and was
searching for the amperage of the connectors of an ATX-PSU.
Does anyone know, where I can get the specifications for it?
E.g. the 24-pin ATX-Connector (24 pins) where we have
or bl bk gn bk bk bk wt rd rd rd bl
+---+
+--------------------+---+-------------+------+
|O O O O O O O O O O | O O|
|O O O O O O O O O O | O O|
+--------------------------------------+------+
or or bk rd bk rd bk gr pu ye ye or
+12 V ye yellow => ???
+ 5 V rd red => ???
+ 3.3V or orange => ???
+ 5 Vsb pu purple => 2 A
- 5 V wt white => 1 A
-12 V bl blue => 0,8A
bk black => GND
same for the P4 connector (4 pins)
+12 V ye yellow => ???
the 6 pin ??? conector
bk bk bk or or rd
+---+
+--------+---+--------+
|O O O O O O|
+---------------------+
+ 5 V rd red => ???
+ 3.3V or orange => ???
and what about the SATA and old HDD connectors?
How many ampers must a cable support?
If you want to ask why I need more or less exact values I respond:
I have the need for 38 DC-PSU's for my own for a solar powered Project
and since my money is very limited, I want to avoid to buy electronics
I do not need...
Also I like to make the DC-PSU modulable, which mean, a standard layout
for the ATX-Connector and then modules which can be added if needed for
P4 conector, 6-Pin-XXX conector or the HDD connectors. Also I want to
use ISO or AMP connectors insteed of making fixed cables on the DC-PSU
which bother me (personaly) if not needed.
For example, I was planing to use DC-DC-Converters from RECOM which have
a very high efficiency (>=88%) but are non realisable since a 40 Watt
model cost arround 72 Euros which mean for the ATX connector:
+12 V => 3,3A 40W 70 Euro
+ 5 V => 8 A 40W 70 Euro
+ 3.3V => 12 A 40W 70 Euro
+ 5 Vsb => 2 A 10W 25 Euro
- 5 V => 1 A 5W 15 Euro
-12 V => 0.8A 10W 25 Euro
-------------------
145W 275 Euro
and a HDD-Cable for three/four devices could be something like
+12 V => 3,3A 40W 70 Euro
+ 5 V => 3 A 15W 30 Euro
-------------------
55W 100 Euro
So I can forget this nice DC-DC converters which simplyfiy design by
factor 20 but of the costs...
Even if I buy produce 1000 PSU's the price would be over 300 Euro
complete per unit. (The "PicoPSU", a PSU on a ATX connector, support
only 12Vin but provides 120 Watt and costs arround 100 Euro)
Dallas, Maxim, NXP and LM offer step-Down regulators in 4x4mm to 6x6mm
cases with 3.3V, 5V, 12V plus negativ voltages up to 60 Ampere for
0.68 US$ to 3.27 US$
And yes, I have already tonns of free samples laying around in my
appartement... (nice to solder TQFN packages... :-)
Thanks, Greetings and nice Day
Michelle Konzack
--
Linux-User #280138 with the Linux Counter, http://counter.li.org/
##################### Debian GNU/Linux Consultant #####################
Michelle Konzack Apt. 917 ICQ #328449886
+49/177/9351947 50, rue de Soultz MSN LinuxMichi
+33/6/61925193 67100 Strasbourg/France IRC #Debian (irc.icq.com)
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