Intel® Stratix® 10 Power Management User Guide

ID 683418
Date 10/31/2023
Document Table of Contents
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2.2.3. Temperature Compensation

Intel® Stratix® 10 devices are able to compensate for performance degradation at colder temperatures by raising the voltage. While raising the voltage does increase the dynamic power consumption, this is countered by lower leakage at cold temperatures, thus enabling total power consumption at cold temperatures to still be lower than at hot temperatures.

The SmartVID feature supports this dynamic voltage adjustment. The SDM Power Manager checks for temperature changes and updates the new VID value if the temperature crosses the threshold point.

Figure 8. Temperature Compensation for SmartVID for Intel® Stratix® 10 Devices—PreliminaryThe SDM monitors the temperature, normally at every 100 ms, and adjusts the voltage by communicating with an external power management system. Adjustment is made by the SDM after the sensor detects the temperature setting is below 10 °C or above 20 °C.

The following shows the process when there is a change in the VID value:

  • If the Intel® Stratix® 10 device operates as the PMBus master, the SDM sends the relevant commands to adjust the voltage of the external voltage regulator using the new VID value.
  • If the Intel® Stratix® 10 device operates as the PMBus slave, the external power management controller gets the new VID value with the VOUT_COMMAND which is issued every 200 ms or less, and set the voltage regulator with the new VID value.