The MAX31785 is a closed-loop multichannel fan controller. The automatic closed-loop fan control architecture controls the fan speed to the lowest possible speed, thereby saving system power. Other benefits of low fan speed include: effectively reducing audible noise and longer fan life, and less system maintenance. Based on the user-programmable lookup table (LUT), the device automatically adjusts the speed of 6 independent fans based on the measurement values of one or more of the 11 temperature sensors. The fan speed can also be manually controlled by an external host, and the device automatically adjusts the fan speed. The device has a fan status diagnostic function to help users prevent impending fan failures. The device can also monitor up to 6 remote voltages.
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