The MAX6684ESA+ is a fan failure detector with integrated power switch in 8 pin NSOIC package. This fan failure detector that detects when a fan exhibits excessive underspeed or a locked rotor. This device is especially well suited for critical systems where no fan control or simple on/off control is desired. It detects fan failure by evaluating fluctuations in current at the low side of the fan, no tachometer signal is necessary. The output of the device, FAIL (complementary), is an active-low, open-drain alarm. IC can also be used to switch the fan on or off, based on the state of a logic-level input, OFF (complementary). This device can be used with fans rated at up to 24V and 250mA. It is used in desktop PCs, notebooks, networking equipment and telecommunications.
● Supply voltage range is 3V to 5.5V
● Operating temperature range from -40°C to 85°C
● Dedicated fan-failure detector
● Works with ordinary 2-wire fans
● No fan tachometer output required
● No software development required
● No analogue circuit design required
● Logic level fan driver control
● Supply current is 3.4mA
