Card Thermal and Electrical Protections

Alveo U280 Data Center Accelerator Card Data Sheet (DS963)

Document ID
Release Date
1.7 English

Built-in shutdown logic protects the card from damage by removing power to the FPGA when either electrical or thermal limits (given in the following table) reach or exceed their respective card shutdown thresholds. VCCINT current and temperature are monitored by the card regulator while FPGA temperature is monitored by the satellite controller (SC). Power to the card SC remains on during card shutdown. Card shutdown protection logic is always enabled and cannot be disabled.

Note: When card shutdown occurs, the card is pulled off the PCIe bus and consequently is not seen by the host. No AXI firewall trip is issued. A cold reboot of the server is required to recover.

The following table lists the card shutdown power and thermal thresholds.

Table 1. Thermal and Electrical Protection Thresholds
Sensor Description Card Shutdown Threshold
VCCINT Current
  • 53.5A (no PCIe AUX power)
  • 214A (2x3 PCIe AUX power)
  • 321A (2x4 PCIe AUX power)
VCCINT Temperature 125°C
FPGA Temperature 107°C