Power Consumption
CP6000
Page 6 - 4
© 2005 Kontron Modular Computers GmbH
ID 27942, Rev. 05
2794
2.05.UG.VC.051020/17275
8
P R E L I M I N A R Y
6.1.2
Backplane
Backplanes to be used with the CP6000 must be adequately specified. The backplane must
provide optimal power distribution for the +3.3 V, +5 V and +12 V power inputs. It is recom-
mended to use only backplanes which have two power planes for the 3.3 V and +5 V voltages.
Input power connections to the backplane itself should be carefully specified to ensure a mini-
mum of power loss and to guarantee operational stability. Long input lines, under dimensioned
cabling or bridges, high resistance connections, etc. must be avoided. It is recommended to
use POSITRONIC or M-type connector backplanes and power supplies where possible.
6.1.3
Power Supply Units
Power supplies for the CP6000 must be specified with enough reserve for the remaining sys-
tem consumption. In order to guarantee a stable functionality of the system, it is recommended
to provide more power than the system requires. An industrial power supply unit should be able
to provide at least twice as much power as the entire system requires. An ATX power supply
unit should be able to provide at least three times as much power as the entire system requires.
As the design of the CP6000 has been optimized for minimal power consumption, the power
supply unit shall be stable even without minimum load.
Where possible, power supplies which support voltage sensing should be used. Depending on
the system configuration this may require an appropriate backplane. The power supply should
be sufficient to allow for die resistance variations.
The start-up behavior of CPCI and PCI (ATX) power supplies is critical for all new CPU boards.
These boards require a defined power of sequence and start-up behavior of the power supply.
The required behavior is described in the ATX (
http://www.formfactors.org/FFDe-
tail.asp?FFID=1&CatID=2
) and the CPCI (PICMG,
http://www.picmgeu.org/
) specification.
6.1.3.1
Start-Up Requirement
Power supplies must comply with the following guidelines, in order to be used with the CP6000.
• Beginning at 10% of the nominal output voltage, the voltage must rise within
> 0.1 ms to < 20 ms to the specified regulation range of the voltage. Typically:
> 5 ms to < 15 ms.
• There must be a smooth and continuous ramp of each DC output voltage from
10% to 90% of the regulation band.
• The slope of the turn-on waveform shall be a positive, almost linear voltage increase and
have a value from 0 V to nominal Vout.
Note ...
Non-industrial ATX PSUs require a greater minimum load than a single
CP6000 is capable of creating. When a PSU of this type is used, it will not
power up correctly and the CP6000 may hangup. The solution is to use an
industrial PSU or to add more load to the system.
Warning!
During power-up, the 3.3 V input power supply must be able to provide a mini-
mum peak current of 10 A to the CP6000. This applies for each CP6000 in a
given system.
Failure to comply with the above warning may result in damage to or improper
operation of the CP6000.
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