External PCIe Power Supply Interfaces
External PCIe Power Supply Interface on the BF1600 Controller Card
The BlueField BF1600 Controller Card consumes power from two power sources; an external+12V through an 8-pin ATX connector (reference #9) and an
additional+12V through the PCIe x16 edge connector. The BF1600 Controller Card’s special circuitry balances the power consumption between these two
power sources. Each power source must be capable of supplying up to 75W of power.The delta between both +12V sources must be less than 0.6V for the
power-sharing circuit to properly operate.The 3.3V AUX from the card’s PCIe edge connector is used for logics on the BF1600 Controller Card. This logic
includes power for buffering logic for signals to the card’s edge connector, power for the FRU EEPROM, and miscellaneous items.The 3.3V from PCIe edge
connector is floating on the board.For the external PCIe power supply pins, please refer toExternal Power Supply Interfaces
.
The BF1600 Controller Card requires the +3.3V AUX to come up prior to the +12V at the PCIe connector.
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