Recommended Power Constraints - 2020.2 English

Versal ACAP System Integration and Validation Methodology Guide (UG1388)

Document ID
UG1388
Release Date
2021-02-04
Version
2020.2 English

Applying the correct power constraints to a design is critical to design closure. Vivado report Power reports the power margin based on the Budget applied as well as additional constraints, below is a list of the minimum recommended constraints. For more information, see the Vivado Design Suite User Guide: Power Analysis and Optimization (UG907)

Minimum Recommended Constraints

set_operating_conditions -design_power_budget <Power in Watts>
set_operating_conditions -process maximum

The above ensures that the power estimation checks the power budget and uses the worst-case maximum process for static power analysis.

Additional Recommended Constraints

set_operating_conditions -ambient_temp <max Ambient requested for application is Celsius>
set_operating_conditions -thetaja <the rise in junction temperature for every watt dissipated, obtained from thermal simulation, C/W>

These constraints will define the thermal solution and all report Power to estimate the Junction Temperature and therefore the static power more accurately.

Vivado report power also allows you to report power on a regulator basis using the following constraint:

 set_operating_conditions -supply_current_budget {<power supply name> <current budget in Amp>}