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ADT7460ARQ

更新时间： 2024-11-21 22:05:23
品牌 Logo 应用领域
亚德诺 - ADI 模拟IC风扇信号电路光电二极管控制器
页数 文件大小 规格书
48页 680K
描述
dB COOL?? Remote Thermal Controller and Fan Controller

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ADT7460ARQ 数据手册

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dBCOOL™ Remote Thermal  
ControllerandFanController  
a
ADT7460*  
FEATURES  
GENERAL DESCRIPTION  
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  
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 tem-  
perature. It can measure and control the speed of up to four  
fans so that they operate at the lowest possible speed for mini-  
mum 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.  
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  
ADDR  
SELECT ADDR EN  
SCL SDA  
SMBALERT  
SMBUS  
ADDRESS  
SELECTION  
SERIAL BUS  
INTERFACE  
ADDRESS  
POINTER  
REGISTER  
AUTOMATIC  
FAN SPEED  
CONTROL  
PWM1  
PWM2  
PWM  
REGISTERS  
AND  
ACOUSTIC  
ENHANCEMENT  
CONTROL  
CONTROLLERS  
PWM3  
PWM  
CONFIGURATION  
REGISTERS  
DYNAMIC  
MIN  
CONTROL  
T
TACH1  
TACH2  
TACH3  
TACH4  
FAN SPEED  
COUNTER  
INTERRUPT  
MASKING  
PERFORMANCE  
MONITORING  
THERMAL  
PROTECTION  
INTERRUPT  
STATUS  
REGISTERS  
THERM  
V
TO ADT7460  
CC  
ADT7460  
V
CC  
D1+  
D1–  
D2+  
D2–  
LIMIT  
COMPARATORS  
10-BIT  
ADC  
INPUT  
SIGNAL  
CONDITIONING  
AND  
VALUE AND  
LIMIT  
REGISTERS  
ANALOG  
MULTIPLEXER  
+2.5V  
IN  
BAND GAP  
REFERENCE  
BAND GAP  
TEMP. SENSOR  
GND  
*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.  
dBCOOL is a trademark of Analog Devices, Inc.  
Intel and Pentium are registered trademarks of Intel Corp.  
REV. 0  
Information furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assumed by Analog Devices for its use,  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
nor for any infringements of patents or other rights of third parties that may  
resultfromitsuse.Nolicenseisgrantedbyimplicationorotherwiseunderany  
patent or patent rights of Analog Devices.  
Tel: 781/329-4700  
Fax: 781/326-8703  
www.analog.com  
© Analog Devices, Inc., 2002  
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