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ADT7463ARQZ-R7 Datasheet(PDF) 1 Page - ON Semiconductor |
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ADT7463ARQZ-R7 Datasheet(HTML) 1 Page - ON Semiconductor |
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1 / 52 page  a ADT7463* dBCOOL™ Remote Thermal Controller and Voltage Monitor REV. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 © 2004 Analog Devices, Inc. All rights reserved. FEATURES 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 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 FUNCTIONAL BLOCK DIAGRAM BAND GAP REFERENCE 10-BIT ADC INPUT SIGNAL CONDITIONING AND ANALOG MULTIPLEXER GND SERIAL BUS INTERFACE SCL SDA ADDRESS POINTER REGISTER ADT7463 VALUE AND LIMIT REGISTERS LIMIT COMPARATORS PWM CONFIGURATION REGISTERS INTERRUPT STATUS REGISTERS BAND GAP TEMP. SENSOR VCC TO ADT7463 INTERRUPT MASKING SMBALERT VCC SMBUS ADDRESS SELECTION ADDR EN ADDR SELECT THERMAL PROTECTION PERFORMANCE MONITORING THERM PWM REGISTERS AND CONTROLLERS PWM1 PWM2 PWM3 ACOUSTIC ENHANCEMENT CONTROL AUTOMATIC FAN SPEED CONTROL DYNAMIC TMIN CONTROL FAN SPEED COUNTER TACH1 TACH2 TACH3 TACH4 D1+ D1– D2+ D2– VCC +5VIN +12VIN +2.5VIN VCCP VID REGISTER VID5 VID4 VID3 VID2 VID1 VID0 GENERAL DESCRIPTION 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. *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. ©2008 SCILLC. All rights reserved. Publication Order Number: January 2008 -Rev. 4 ADT7463/D |
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