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ADM1027

更新时间： 2024-11-18 04:31:19
品牌 Logo 应用领域
亚德诺 - ADI 电源电路电源管理电路监视器光电二极管控制器
页数 文件大小 规格书
56页 1009K
描述
dBCOOL-TM Remote Thermal Controller and Voltage Monitor

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ADM1027 数据手册

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dBCOOL™ Remote Thermal  
Controller and Voltage Monitor  
ADM1027*  
FEATURES  
GENERAL DESCRIPTION  
Monitors up to 5 Supply Voltages  
The ADM1027 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, 2.5 V CPU supply voltage, plus its own supply volt-  
age. 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 auto-  
matic fan speed control loop optimizes fan speed for a given  
temperature. Once the control loop parameters are programmed,  
the ADM1027 can vary fan speed without CPU intervention.  
Controls and Monitors up to 4 Fan Speeds  
1 On-Chip and 2 Remote Temperature Sensors  
Monitors up to 5 Processor VID Bits  
Automatic Fan Speed Control Mode Controls System  
Cooling Based on Measured Temperature  
Enhanced Acoustic Mode Dramatically Reduces User  
Perception of Changing Fan Speeds  
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  
SCL SDA  
SELECT ADDR EN  
SMBALERT  
VID4  
VID3  
VID2  
VID1  
VID0  
SMBUS  
ADDRESS  
SELECTION  
SERIAL BUS  
INTERFACE  
VID  
REGISTER  
ADDRESS  
POINTER  
REGISTER  
AUTOMATIC  
FAN SPEED  
CONTROL  
PWM  
PWM1  
PWM2  
PWM  
REGISTERS  
AND  
ACOUSTIC  
ENHANCEMENT  
CONTROL  
CONFIGURATION  
REGISTERS  
PWM3  
CONTROLLERS  
TACH1  
TACH2  
TACH3  
TACH4  
FAN SPEED  
COUNTER  
INTERRUPT  
MASKING  
V
CC  
TO ADM1027  
V
CC  
ADM1027  
INTERRUPT  
STATUS  
D1+  
D1–  
D2+  
D2–  
+5V  
+12V  
REGISTERS  
INPUT  
SIGNAL  
10-BIT  
ADC  
LIMIT  
CONDITIONING  
AND  
IN  
IN  
IN  
COMPARATORS  
ANALOG  
+2.5V  
MULTIPLEXER  
BAND GAP  
V
CCP  
VALUE AND  
LIMIT  
REFERENCE  
REGISTERS  
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.  
REV. A  
Information furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assumed by Analog Devices for its  
use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat  
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 companies.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781/329-4700  
Fax: 781/326-8703  
www.analog.com  
© 2003 Analog Devices, Inc. All rights reserved.  
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ADM1027 替代型号

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