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CP6924-1-RA-A User Guide
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6
Power Considerations
The power considerations presented in this chapter must be taken into account by system integrators when specifying the
CP6924 system environment.
6.1
Baseboard
The CP6924 has been designed for optimal power input and distribution. Still it is necessary to observe certain criteria
essential for application stability and reliability. The board is supplied by 3.3V and 5.0V from the backplane. All supply volt-
ages from the backplane are enabled with a predefined ramp-up time. The inrush current is limited by Hot-Swap control-
lers.
The table below indicates the absolute maximum input voltage ratings that must not be exceeded. Power supplies to be
used with the CP6924 should be carefully tested to ensure compliance with these ratings.
Power consumption: below 50 W.
5.0 V VIN +5%/-3%, designed for maximum load 8A (40W)
•
3.3V PoL Converter
•
1.25V PoL Converter
•
1.00V PoL Converter
3.3 V VIN +5%/-3%, designed for maximum load 10A (33W)
•
2.5V PoL Converter
•
1.8V PoL Converter
•
1.20V PoL Converter
6.2
Backplanes
Backplanes to be used with the CP6924 must be adequately specified. The backplane must provide optimal power distribu-
tion for the +3.3 V and +5 V power inputs. Input power connections to the backplane itself should be carefully specified to
ensure a minimum 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.
Table 6-1:
Maximum Input Power Voltage Limits
Voltage Rail
Operation Mode
Maximum Current
V_3V3_CPCI
24x 1Gbps traffic rear
2x 1Gbps front SFP+ ports
6.25A
V_5V0_CPCI
24x 1Gbps traffic rear
2x 10Gbps front SFP+ ports
4.00A
