Rainbow-electronics MAX6661 Manual de usuario

General DescriptionThe MAX6661 is a remote temperature sensor and fan-speed regulator that provides complete closed-loop fancontrol. The remote temper

MAX6661Remote Temperature-Controlled Fan-SpeedRegulator with SPI-Compatible Interface10 ______________________________________________________________

+127°C, for TLOWis -55°C, for TMAXis +100°C, and forTHYSTis +95°C.Overtemperature Output (OVERT)The MAX6661 has an overtemperature output (OVERT)that

MAX6661present. Bits 2 through 6 of the status register arecleared by any successful read of the status register,unless the fault persists. The ALERT

on the amount of time between status read operations.In these circumstances, it is best not to rely on the sta-tus bits to indicate reversals in long-

MAX6661In thermal open-loop mode, the fan loop can operate inopen or closed mode. In fan open loop, the FSC regis-ter programs fan voltage directly, a

MAX6661Remote Temperature-Controlled Fan-SpeedRegulator with SPI-Compatible Interface_________________________________________________________________

MAX6661using the FSC register. By selecting fan open-loopmode, the MAX6661 automatically invokes thermalopen-loop mode.Fan Conversion Rate RegisterThe

register to the desired fan frequency [read: speed]. The8415Hz is divided down from the MAX6661 internalclock, and has a ±25°C tolerance.1) Determine

MAX6661The 83.4Hz value is out of the 33Hz to 66Hz decre-ment/increment range.Set bits in the FTD register to divide the signal downwithin the 33Hz to

MAX6661Remote Temperature-Controlled Fan-SpeedRegulator with SPI-Compatible InterfaceMaxim cannot assume responsibility for use of any circuitry other

MAX6661Remote Temperature-Controlled Fan-SpeedRegulator with SPI-Compatible Interface2 _______________________________________________________________

MAX6661Remote Temperature-Controlled Fan-SpeedRegulator with SPI-Compatible Interface_________________________________________________________________

MAX6661Remote Temperature-Controlled Fan-SpeedRegulator with SPI-Compatible Interface4 _______________________________________________________________

Detailed DescriptionThe MAX6661 is a remote temperature sensor and fancontroller with an SPI interface. The MAX6661 convertsthe temperature of a remot

MAX6661Remote Temperature-Controlled Fan-SpeedRegulator with SPI-Compatible Interface6 _______________________________________________________________

The transistor must be a small-signal type with a rela-tively high forward voltage. Otherwise, the A/D inputrange could be violated. The forward volta

MAX66615) When introducing a thermocouple by inserting differ-ent metals in the connection path, make sure thatboth the DXP and the DXN paths have mat

register is not loaded. DOUT is high impedance duringa WRITE operation. Figure 4 shows the write cycle.For single byte commands such as OSHT and SPOR,