GENERAL DESCRIPTION

The ADT74601 dBCOOL controller is a thermal monitor and multiple PWM fan controller for noise-sensitive applications requiring active system cooling. It can monitor the temperature of up to two remote sensor diodes plus its own internal temperature.

FEATURES

Controls and monitors up to 4 fan speeds

1 on-chip and 2 remote temperature sensors

Dynamic TMIN control mode optimizes system acoustics intelligently

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 THERM input

2-wire and 3-wire fan speed measurement

Limit comparison of all monitored values

Meets SMBus 2.0 electrical specifications (fully SMBus 1.1-compliant)

APPLICATIONS

Low acoustic noise PCs

Networking and telecommunications equipment