I want to control the speed of a fan (which is a 2-phase brushless DC motor). I am currently using a suitable power supply to run the fans. My source is a Data Acquisition device that outputs up to +10VDC but only drives 5mA maximum. I want to supply up to 1.5A and about 24VDC to the fan.
I was thinking of using a motor driver, and I found several but they usually require at least 6mA of current to run the motor driver, with a typical voltage input of between 6.4 and 7VDC. Is the combination of data acquisition device and motor driver sufficient?
Are there better alternatives out there? Again, I would like to control the speed of fan using the data acquisition device only, not having to use a power supply.