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ADT7460

Analog Devices
Part Number ADT7460
Manufacturer Analog Devices
Description dB COOL Remote Thermal Controller and Fan Controller
Published Jun 10, 2009
Detailed Description a FEATURES www.datasheet4u.com Controls and Monitors up to 4 Fan Speeds 1 On-Chip and 2 Remote Temperature Sensors Dynam...
Datasheet PDF File ADT7460 PDF File

ADT7460
ADT7460

Overview
a FEATURES www.
datasheet4u.
com 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) dB COOL™ Remote Thermal Controller and Fan Controller ADT7460* GENERAL DESCRIPTION The ADT7460 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.
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 ADT7460 also provides critical Thermal Protection to the system using the bidirectional THERM pin as an output to prevent system or component overheating.
APPLICATIONS Low Acoustic Noise PCs Networking and Telecommunications Equipment FUNCTIONAL BLOCK DIAGRAM ADDR SELECT ADDR EN SCL SDA SMBALERT SMBUS ADDRESS SELECTION AUTOMATIC FAN SPEED CONTROL SERIAL BUS INTERFACE ADDRESS POINTER REGISTER PWM1 PWM2 PWM3 PWM REGISTERS AND CONTROLLERS ACOUSTIC ENHANCEMENT CONTROL TACH1 TACH2 TACH3 TACH4 PERFORMANCE MONITORING THERM VCC TO ADT7460 THERMAL PROTECTION FAN SPEED COUNTER DYNAMIC TMIN CONTROL PW...


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