App note: Fan speed control is cool!


App note from Maxim Integrated about their MAX6650 and MAX6651 fan controllers chip. Link here (PDF)

Temperature-based fan control is a necessity in a growing number of systems, both to reduce system noise and to improve fan reliability. When fan control is augmented by fan-speed monitoring, a speed-control loop can be implemented that is independent of manufacturing variances and wear on the fan. In addition, a fan that is about to fail can be identified so that it can be replaced before it fails.

from Dangerous Prototypes

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