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ADT7490ARQZ

更新时间： 2024-11-23 11:51:03
品牌 Logo 应用领域
安森美 - ONSEMI 风扇光电二极管监控控制器
页数 文件大小 规格书
75页 652K
描述
dBCool Remote Thermal Monitor and Fan Controller with PECI Interface

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ADT7490ARQZ 数据手册

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ADT7490  
dBCoolR Remote Thermal  
Monitor and Fan Controller  
with PECI Interface  
The ADT7490 is a dBCool thermal monitor and multiple PWM fan  
controller for noise−sensitive or power−sensitive applications  
requiring active system cooling. The ADT7490 includes a local  
temperature sensor, two remote temperature sensors including series  
resistance cancellation, and monitors CPU temperature with a PECI  
interface. The ADT7490 can drive a fan using either a low or high  
frequency drive signal, 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−24 NB  
CASE 492B  
The automatic fan speed control loop optimizes fan speed  
for a given temperature using the PECI, remote, or local temperature  
information. The effectiveness of the system’s thermal solution can be  
monitored using the THERM input. The ADT7490 also provides  
critical thermal protection to the system using the bidirectional  
THERM/SMBALERT pin as an output to prevent system or  
component overheating.  
MARKING DIAGRAMS  
1
ADT7490  
ARQZ  
#DateCode  
Assembly Lot  
Features  
• Temperature Measurement  
TOP MARKING  
BOTTOM MARKING  
♦ 1 Local On−Chip Temperature Sensor  
♦ 2 Remote Temperature Sensors  
# = Pb−Free Package  
♦ 3 Current External Temperature Sensors with Series Resistance  
Cancellation (SRC)  
♦ PECI Interface for CPU Thermal Information and Support of Up  
to 4 PECI Inputs on 1 Pin  
PIN ASSIGNMENT  
• Fan Drive and Fan Speed Control  
SDA  
24 PWM1/XTO  
23  
1
2
♦ 3 High Frequency or Low Frequency PWM Outputs for Use with  
3−Wire or 4−Wire Fans  
SCL  
V
CCP  
GND  
22  
21  
3
+2.5V /THERM  
IN  
V
4
+12V  
IN  
CC  
♦ 4 TACH Inputs to Measure Fan Speed  
♦ OS Independent Automatic Fan Speed Control Based on Thermal  
Information  
GPIO1  
GPIO2  
PECI  
20 +5V  
IN  
5
6
19  
I
ADT7490  
TOP VIEW  
MON  
7
18 D1+  
♦ Dynamic T  
Control Mode to Optimize System Acoustics  
MIN  
D1–  
D2+  
8
17  
16  
V
TT  
♦ Default Startup at 100% PWM for All Fans for Robust Operation  
9
TACH3  
10  
11  
12  
15 D2–  
TACH4/THERM/SMBALERT/  
ADDR SELECT  
13 PWM3/ADDREN  
• Bidirectional THERM/SMBALERT Pin to Flag Out−of−Limit and  
Overtemperature Conditions  
PWM2/SMBALERT  
TACH1  
14  
TACH2  
• GPIO Functionality to Support Extra Features  
♦ Can be Used for Loadline Setting for Voltage Regulation, LED  
Control, or Other Functions  
ORDERING INFORMATION  
See detailed ordering and shipping information in the package  
dimensions section on page 74 of this data sheet.  
• I  
Monitoring for CPU Current and Power Information  
• Footprint and Register Compatible with ADT7473/ADT7475/  
ADT7476/ADT7476A Family of Fan Controllers  
MON  
• SMBus Interface with Addressing Capability for Up to 3 Devices  
Applications  
• Personal Computers  
• Servers  
© Semiconductor Components Industries, LLC, 2009  
1
Publication Order Number:  
December, 2009 − Rev. 4  
ADT7490/D  
1234567...75

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ADT7490ARQZ 替代型号

型号 品牌 替代类型 描述 数据表
ADT7490ARQZ-REEL ONSEMI

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