Kontron CP932 - Manual (Page 49)

CP932 Power Considerations
ID 30048, Rev. 01 © 2005 Kontron Modular Computers GmbH Page 5 - 5
3004
8.01.UG.VC.050622/19130
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P R E L I M I N A R Y
5.4.1 Voltage Ramp
Power supplies must comply with the following guidelines, in order to be used with the CP932.
• 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.
5.4.2 Voltage Sequencing Requirements
The +5 VDC output level must always be equal to or higher than the +3.3 VDC output during
power-up and normal operation.
5.4.3 Rise Time Diagram
The following figure illustrates an example of the recommended voltage ramp of a CompactPCI
power supply for all Kontron boards delivered up to now.
Figure 6-1: Voltage Ramp of the CP3-SVE180 AC Power Supply