dBCOOL™ Remote Thermal
Controller and Voltage Monitor
Monitors up to 5 Supply Voltages
Controls and Monitors up to 4 Fan Speeds
1 On-Chip and 2 Remote Temperature Sensors
Monitors up to 6 Processor VID Bits
Dynamic TMIN Control Mode Optimizes System
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)
The ADT7463 dBCOOL controller is a complete systems
monitor and multiple PWM fan controller for noise-sensitive
applications requiring active system cooling. It can monitor
12 V, 5 V, and 2.5 V CPU supply voltages, 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 four 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.
A unique dynamic TMIN control mode enables the system
thermals/acoustics to be intelligently managed. The effectiveness
of the system’s thermal solution can be monitored using the
THERM input. The ADT7463 also provides critical thermal
protection to the system using the bidirectional THERM pin
as an output to prevent system or component overheating.
Low Acoustic Noise PCs
Networking and Telecommunications Equipment
FUNCTIONAL BLOCK DIAGRAM
SELECT ADDR EN SCL SDA SMBALERT
VCC TO ADT7463
*Protected by U.S. Patent Nos. 6,188,189; 6,169,442; 6,097,239; 5,982,221; and 5,867,012. Other patents pending.
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