For product comparison, please consider:

The EMC2102 is an SMBus, closed-loop, RPM-based fan controller/driver with hardware (HW) thermal shutdown and reset controller. The EMC2102 is packaged in a thermally enhanced, compact, 5x5, 28-pin RoHS compliant QFN package.

The EMC2102 utilizes Beta Compensation (an implementation of the BJT or transistor model for thermal diodes) and Resistance Error Correction (REC) to accurately monitor three external temperature zones. These features allow great accuracy for CPU substrate thermal diodes on multiple process geometries as well as with discrete diode-connected transistors. Both Beta Compensation and REC can be disabled on the EMC2102 to maintain accuracy when monitoring AMD thermal diodes.

The EMC2102 includes a closed-loop RPM based Fan Control Algorithm that integrates a linear fan driver capable of sourcing 600mA of current. The fan control algorithm is designed to work with fans that operate up to 16,000 RPMs.

The EMC2102 provides a stand-alone HW thermal shutdown block. The HW thermal shutdown logic can be configured for a few common configurations based on the strapping level of the SHDN_SEL pin on the PCB. The HW thermal shutdown point can be set in 1°C increments by using a discrete resistor divider implemented on the TRIP_SET pin.

The EMC2102 also provides 5V supply 'power good' function with a threshold of 4.5V. This function is provided on the RESET# pin.

Features

  Designed to support 45nm, 65nm, and 90nm CPU Diodes

  Supports BJT and transistor models for diode channels

  Closed-Loop RPM Based Fan Controller

  Accepts External Clock Source To Achieve 2% Accuracy

  Integrated Linear Fan Driver

  600mA Drive Capability

  HW Thermal Shutdown (SYS_SHDN#)

  1°C Incremental Set Points For Thermal Shutdown

  Cannot be disabled by software

  Provides Reset Function (RESET#) On 5V Supply

  Three Remote Thermal Zones

  ±1°C Accuracy (60°C to 100°C)

  1°C Resolution

  Resistance Error Correction On Thermal 'Diode' Channels

  Eliminates Temperature Offset Due To Series Resistance From PCB Traces And Thermal 'Diode'

  Thermally Enhanced, 28-pin, 5x5 QFN RoHS Compliant Package

  Operates From Single 3.0 - 3.6V Supply

  5V Supply For Linear Fan Driver

  Software Configurable ALERT# Signal For Diode Fault, Fan Stall Or System Warning

Applications

  Notebook Computers

  Desktop Computers

  Embedded Applications