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ADT7473_11

更新时间： 2024-11-22 08:20:23
品牌 Logo 应用领域
安森美 - ONSEMI 风扇监控
页数 文件大小 规格书
74页 1814K
描述
dbCOOL Remote Thermal Monitor and Fan Control

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ADT7473_11 数据手册

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ADT7473  
dbCOOLt Remote Thermal  
Monitor and Fan Control  
The ADT7473/ADT7473−1 dbCOOL controller is a thermal  
monitor and multiple PWM fan controller for noise sensitive or power  
sensitive applications requiring active system cooling. The  
ADT7473/ADT7473−1 can drive a fan using either a low or high  
frequency drive signal, monitor the temperature of up to two remote  
sensor diodes plus its own internal temperature, and measure and  
control the speed of up to four fans so they operate at the lowest  
possible speed for minimum acoustic noise.  
http://onsemi.com  
QSOP−16  
CASE 492  
The automatic fan speed control loop optimizes fan speed for a  
given temperature. A unique dynamic T  
control mode enables the  
MIN  
system thermals/acoustics to be intelligently managed. The  
effectiveness of the system’s thermal solution can be monitored using  
the THERM input. The ADT7473/ADT7473−1 also provide critical  
thermal protection to the system using the bidirectional THERM pin  
as an output to prevent system or component overheating.  
MARKING DIAGRAMS  
ADT747  
ADT  
7473−1  
ARQZ  
xxxx  
3ARQZ  
#YYWW  
xxxx  
FEATURES  
• Controls and Monitors Up to 4 Fans  
• High and Low Frequency Fan Drive Signal  
• 1 On−Chip and 2 Remote Temperature Sensors  
• Series Resistance Cancellation on the Remote Channel  
• Extended Temperature Measurement Range, Up to 191°C  
ADT7473  
ADT7473−1  
#
= Pb−Free Package  
YYWW = Date Code  
xx  
= Assembly Lot  
• Dynamic T  
Control Mode Intelligently Optimizes System  
MIN  
Acoustics  
PIN ASSIGNMENTS  
• Automatic Fan Speed Control Mode Controls System Cooling Based  
on Measured Temperature  
• Enhanced Acoustic Mode Dramatically Reduces User Perception of  
Changing Fan Speeds  
SCL  
16 SDA  
1
2
3
4
5
6
7
8
GND  
15 PWM1/XTO  
V
14  
13  
V
CCP  
CC  
• Thermal Protection Feature via THERM Output  
TACH3  
D1+  
ADT7473  
TOP VIEW  
• Monitors Performance Impact of Intel PentiumR 4 Processor  
PWM2/  
SMBALERT  
12 D1–  
11 D2+  
10 D2–  
• Thermal Control Circuit via THERM Input  
• 3−Wire and 4−Wire Fan Speed Measurement  
• Limit Comparison of All Monitored Values  
TACH1  
TACH2  
TACH4/GPIO/THERM  
9
PWM3  
SMBALERT  
• Meets SMBus 2.0 Electrical Specifications  
(Fully SMBus 1.1 Compliant)  
SCL  
16 SDA  
1
2
3
4
5
6
7
8
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS  
Compliant  
GND  
15 PWM1/XTO  
V
14  
13  
V
CCP  
CC  
TACH3/  
ADDR SELECT  
D1+  
ADT7473−1  
TOP VIEW  
THERM_LATCH/  
12 D1–  
11 D2+  
10 D2–  
PWM2  
TACH1  
TACH2  
TACH4/GPIO/THERM  
SMBALERT  
9
PWM3/ADDREN  
ORDERING INFORMATION  
See detailed ordering and shipping information in the package  
dimensions section on page 73 of this data sheet.  
© Semiconductor Components Industries, LLC, 2011  
1
Publication Order Number:  
October, 2011 − Rev. 7  
ADT7473/D  
1234567...74

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