DESCRIPTION

· The ADT7473/ADT7473-1 is a thermal monitor and multiple PWM fan controller designed for noise-sensitive or power-sensitive applications requiring active system cooling.

· It can drive fans using low or high-frequency signals, monitor up to two remote sensor diodes and its internal temperature, and control the speed of up to four fans for minimal acoustic noise.

· The device features an automatic fan speed control loop and dynamic T_MIN control mode for intelligent thermal and acoustic management.

FEATURES

· Controls and monitors up to 4 fans.

· Supports high and low-frequency fan drive signals.

· Includes 1 on-chip and 2 remote temperature sensors.

· Features series resistance cancellation on the remote channel.

· Offers an extended temperature measurement range up to 191°C.

· Dynamic T_MIN control mode for optimized system acoustics.

· Automatic fan speed control based on measured temperature.

· Enhanced acoustic mode reduces user perception of changing fan speeds.

· Thermal protection via THERM output.

· Monitors performance impact of Intel Pentium 4 processors.

· Thermal control circuit via THERM input.

· Supports 3-wire and 4-wire fan speed measurement.

· Limit comparison of all monitored values.

· Complies with SMBus 2.0 electrical specifications.

· Pb-Free, Halogen Free/BFR Free, and RoHS compliant.

APPLICATIONS

· Noise-sensitive systems requiring active cooling.

· Power-sensitive applications with thermal management needs.

· Systems requiring intelligent thermal and acoustic optimization.

· Environments where minimal fan noise is critical.

· Systems needing thermal protection and monitoring.