The following figure shows the high-level input power tree.
Figure 1. Card Input Power Tree
Key details include:
- The card is powered from PCIe edge connector. Additional power can be supplied via the PCIe AUX connector.
- Main FPGA power is delivered by ISL68224 controller with ISL99360 and RAA2213404GNP power stages.
- VCCINT power is generated by three power phases, taking input power
from the following:
-
PCIe 12V edge connector
(12V_PEX)
- Powering one VCCINT power phase
-
PCIe 12V Auxiliary
(12V_AUX)
- Powering two VCCINT power phases
-
PCIe 12V edge connector
(12V_PEX)
- Each QSFP-DD port uses isolated power, delivered by a dedicated regulator, which provides power enable and over-current control.
There are four power rails with the names and sources given in the following table.
Note: The card can operate without AUX power connected,
however card power will be reduced, including the QSFP modules which will be limited to
3.5W.
| Power Rail Name | Source |
|---|---|
| 12V_PEX | PCIe Edge Connector |
| 3V3_PEX | PCIe Edge Connector |
| 3V3_AUX | PCIe Edge Connector |
| 12V_AUX | PCIe AUX Connector 1 |