Kontron AM4904, User Manual

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Power Considerations
92 AM4904 User Guide
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5.2.2 Management Power
The AM4904 management power is used for IPMB interfaces and Module operation state control (PWR_ON#)
and display (BLUE LED).
The management power voltage shall be 3.3 V ± 5% at the module contacts during normal conditions under
all loads (see “DC Operational Input Voltage Ranges” on page 91)
5.2.3 Payload and Management Voltage Ramp
Power supplies must comply with the following guidelines, in order to be used with the AM4904:
• 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 regu-
lation 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.
5.3 Power Consumption
5.3.1 Payload Power Consumption
The payload power consumption table below lists the typical and maximum payload power consumption for
the AM4904 variants. All measurements were conducted at a temperature of 25°C with a payload power of 12
V.
Table 5-2: Payload Power Consumption
Board type typical max
AM4904-BASE 22.0 W 26.0 W
AM4904-sRIO 31.0 W 35.0 W
AM4904-PCIe 34.0 W 40.0W
Note...
The power consumption values indicated can vary depending on the ambient
temperature. This can result in deviations of the power consumption values of up
to 10%.