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MAX31785 Production
The MAX31785 is a closed-loop multichannel fan controller. Automatic closed-loop fan control saves system power by operating the fans at the lowest possible...
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MAX31785 on Analog.com

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Article What is the current capability for the PWM output pins of the MAX31785?

The source/sink capability of the PWM output is in the VOH1 and VOL1 specifications.  The PWM output pins can sink 4mA and source 2mA.