MAX6620
MAX6620 is Quad Linear Fan-Speed Controller manufactured by Maxim Integrated.
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MAX6620 Quad Linear Fan-Speed Controller
General Description
The MAX6620 controls the speeds of up to four fans using four independent linear voltage outputs. The drive voltages for the fans are controlled directly over the I2C interface. Each output drives the base of an external bipolar transistor or the gate of a FET in highside drive configuration. Voltage feedback at the fan’s power-supply terminal is used to force the correct output voltage.
The MAX6620 offers two methods for fan control. In RPM mode, the MAX6620 monitors four fan tachometer logic outputs for precise (±1%) control of fan RPM and detection of fan failure. In DAC mode, each fan is driven with...
