ADT7473ARQZ-1R7

更新时间： 2024-02-26 23:54:18

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	1847K
描述
dBCOOL Remote Thermal Monitor and Fan Control

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ADT7473ARQZ-1R7 数据手册

ADT7473

dBCOOL^RRemote 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

= 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

GND

15 PWM1/XTO

CCP

• Thermal Protection Feature via THERM Output

TACH3

D1+

ADT7473

TOP VIEW

• Monitors Performance Impact of Intel Pentium^R4 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

PWM3

SMBALERT

• Meets SMBus 2.0 Electrical Specifications

(Fully SMBus 1.1 Compliant)

SCL

16 SDA

• This is a Pb−Free Device

• Fully RoHS Compliant

GND

15 PWM1/XTO

CCP

TACH3/

ADDR SELECT

D1+

ADT7473−1

TOP VIEW

THERM_LATCH/

12 D1–

11 D2+

10 D2–

PWM2

TACH1

TACH2

TACH4/GPIO/THERM

SMBALERT

PWM3/ADDREN

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 73 of this data sheet.

Publication Order Number:

April, 2009 − Rev. 6

ADT7473/D

12 3 4 5 6 7...74

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