GENERAL DESCRIPTION
The ADT7466 dBCool controller is a complete thermal monitor and dual fan controller for noise-sensitive applications requiring active system cooling. It can monitor two analog voltages or the temperature of two thermistors, plus its own supply voltage. It can monitor the temperature of up to two remote sensor diodes, plus its own internal temperature. It can measure and control the speed of up to two fans so that they operate at the lowest possible speed for minimum acoustic noise. The automatic fan speed control loop optimizes fan speed for a given temperature.

FEATURES
    Monitors two analog voltages or thermistor temperature inputs
    One on-chip and up to two remote temperature sensors with series resistance cancellation
    Controls and monitors the speed of up to two fans
    Automatic fan speed control mode controls system cooling based on measured temperature
    Enhanced acoustic mode dramatically reduces user perception of changing fan speeds
    Thermal protection feature via THERM output monitors performance impact of Intel® Pentium® 4 processor thermal control circuit via PROCHOT input
    3-wire fan speed measurement
    Limit comparison of all monitored values
    SMBus 1.1 serial interface

APPLICATIONS
    Low acoustic noise notebook PCs