| US 7,574,321 B2 | ||
| Model predictive thermal management | ||
| Kent Kernahan, Cupertino, Calif. (US); Craig Norman Lambert, San Jose, Calif. (US); and Sorin Andrei Spanoche, Santa Clara, Calif. (US) | ||
| Assigned to Exar Corporation, Fremont, Calif. (US) | ||
| Filed on Oct. 11, 2006, as Appl. No. 11/548,283. | ||
| Claims priority of provisional application 60/725983, filed on Oct. 11, 2005. | ||
| Prior Publication US 2007/0168151 A1, Jul. 19, 2007 | ||
| Int. Cl. G06F 19/00 (2006.01); G01K 17/00 (2006.01) | ||
| U.S. Cl. 702—179 [702/136; 702/187; 702/188; 713/300] | 23 Claims |
| 4. A method for controlling the temperature of any of a plurality of electrical components, wherein the electrical components
dissipate substantially all of their received power in the form of heat, the method comprising:
(a) monitoring a power source wherein the power source provides power to each of the electrical components independently,
obtaining a power parameter value for each of the electrical components therefrom;
(b) calculating the power dissipated by each of the electronic components;
(c) calculating a temperature parameter value for each of the electrical components, using a thermal model and predetermined
coefficients comprising the steps of:
calculating a self-heating parameter value;
subtracting a parameter value representing heat loss; and
adding a parameter value representing the net heat transfer between the certain one electrical component and each of the remaining
electrical components;
(d) calculating an instant temperature of each electrical component by combining the calculated temperature parameter value
of said electrical component to a previously stored temperature value of said electrical component;
(e) comparing the instant temperature of each electrical component to a corresponding predetermined value; and
(f) reducing the power dissipation of any one or more of the electrical components wherein the calculated temperature exceeds
a predetermined value by a step selected from the group of actions consisting of:
reducing the voltage applied to the electrical component,
reducing the clocking frequency of the electrical component,
reducing the performance of the electrical component, and
controlling a cooling means.
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