Input Voltage Characteristics; Start-Up Requirement - Kontron CP6500-V User Manual

CP6500-V
6.1.3.1

Start-Up Requirement

Power supplies must comply with the following guidelines, in order to be used with the
CP6500-V.
• 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.
6.1.3.2 Power-Up Sequence
The +5 VDC output level must always be equal to or higher than the +3.3 VDC output during
power-up and normal operation.
The time from +5 VDC until the output reaches its minimum in regulation level and from
+3.3 VDC until the output reaches its minimum in regulation level must be < 20 ms.
6.1.3.3 Tolerance
The tolerance of the voltage lines is described in the CPCI specification (PICMG 2.0 R3.0).The
recommended measurement point for the voltage is the CPCI connector on the CPU board.
The following table provides information regarding the required characteristics for each board
input voltage.
Table 6-3:

Input Voltage Characteristics

VOLTAGE NOMINAL VALUE
5 V
3.3 V
+12 V
-12 V
V I/O (PCI) voltage +3.3 VDC or +5 VDC
GND Ground, not directly connected to potential earth (PE)
The output voltage overshoot generated during the application (load changes) or during the
removal of the input voltage must be less than 5% of the nominal value. No voltage of reverse
polarity may be present on any output during turn-on or turn-off.
ID 28945, Rev. 01
TOLERANCE
+5.0 VDC +5%/-3%
+3.3 VDC +5%/-3%
+12 VDC +5%/-5%
-12 VDC +5%/-5%
+5%/-3%
© 2005 Kontron Modular Computers GmbH
Power Consumption
MAX. RIPPLE (p-p)
50 mV
50 mV
240 mV
240 mV
50 mV Standard Version
REMARKS
Main voltage
--
Required
Only for PMC
+5.0V
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