MAX6660AEE+T

The MAX6660AEE+T is a remote junction temperature controlled fan speed regulator with SMBus interface in 16 pin QSOP package. This remote temperature sensor is a common collector PNP such as a substrate PNP of microprocessor or diode connected transistor (typically a low cost, easily mounted 2N3904 NPN type or 2N3906 PNP type). It incorporates a closed loop fan controller that regulates fan speed with tachometer feedback. The MAX6660 compares temperature data to a fan threshold temperature and gain setting, both programmed over the SMBus by the user. The result is automatic fan control that is proportional to the remote junction temperature. The temperature feedback loop can be broken at any time for system control over the speed of the fan. Fan speed is voltage controlled as opposed to PWM controlled, greatly reducing acoustic noise and maximizing fan reliability. Temperature data is updated every 0.25s and is readable at any time over the SMBus interface.

• Integrated thermal sensing and fan regulation solution
• Supply voltage range from 3V to 5.5V
• Operating temperature range from -40°C to 125°C
• Accurate closed loop fan speed regulation and programmable under/overtemperature alarms
• Operating supply current of 250μA and shutdown supply current of 3μA
• SMBus 2-wire serial interface with timeout and supports SMBus alert response
• Temperature resolution of 0.125°C (11bits) and temperature conversion time of 0.25s
• ACPI compatible including active-low OVERT system shutdown function
• ±1°C (+60°C to +100°C) thermal sensing accuracy
• On-chip power device drives fans rated up to 250mA

Notas

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party