- Transient Analysis Overshoot in Temperature for High Power Thermal Solutions
- There is a trend to increase processor performance with high thermal design power consumption. Transient temperature changes from low to high power induces overshoot in temperature, generating thermal events; however, thermal solution is capable of cooling in steady state condition. This effect asserts throttling mechanism during transient state while showing temperature and power spikes. Identifying the magnitude of the overshoot in the transition from one state to another, and modifying the existing control algorithm to minimize offsets in temperature target can be key to avoid exceeding the critical temperature. The proposal is that this overshoot would be identified and remediated at initial phases of system development to mitigate any potential complaint from customers.nnThis work is focused on the transient behavior situation that induces overshoot in temperature, identify cases of unavoidable over temperature for a given cooling solution and fan speed control considerations to minimize this adverse condition. We present a new approach to identify the initial and final states to understand the residual energy the heatsink needs to dissipate. The hypothesis presented illustrates the theory behind this phenomena to reach the final isothermal temperature distribution when high power and high airflow are required.
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