ADT7467 データシートの表示（PDF） - ON Semiconductor

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ADT7467

dbCOOL Remote Thermal Monitor and Fan Controller

ON Semiconductor 

ADT7467

dbCOOL Remote Thermal

Monitor and Fan Controller

The ADT7467 dbCOOL controller is a thermal monitor and

multiple PWM fan controller for noise-sensitive or power-sensitive

applications requiring active system cooling. The ADT7467 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

that they operate at the lowest possible speed for minimum 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 ADT7467 also provides critical thermal

protection to the system using the bidirectional THERM pin as an

output to prevent system or component overheating.

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

 Dynamic TMIN Control Mode Intelligently Optimizes System

Acoustics

 Automatic Fan Speed Control Mode Manages System Cooling based

on Measured Temperature

 Enhanced Acoustic Mode Dramatically Reduces User Perception of

Changing Fan Speeds

 Thermal Protection Feature via THERM Output

 Monitors Performance Impact of Intel Pentium 4 Processor

 Thermal Control Circuit via THERM Input

 2-wire, 3-wire, and 4-wire Fan Speed Measurement

 Limit Comparison of All Monitored Values

 Meets SMBus 2.0 Electrical Specifications

(Fully SMBus 1.1 Compliant)

 This Device is Pb-Free and is RoHS Compliant*

 Halide-Free Packages are Available

http://onsemi.com

QSOP−16

CASE 492

PIN ASSIGNMENT

SCL 1

GND 2

VCC 3

TACH3 4

PWM2/

SMBALERT

5

TACH1 6

TACH2 7

PWM3 8

ADT7467

(Top View)

16 SDA

15 PWM1/XTO

14 VCCP

13 D1+

12 D1−

11 D2+

10 D2−

9 TACH4/GPIO/

THERM/

SMBALERT

MARKING DIAGRAM

T7467A

RQZ

#YYWW

T7467ARQZ

#

YY

WW

= Specific Device Code

= Pb-Free Package

= Date Code

= Work Week

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 70 of this data sheet.

* For additional information on our Pb-Free strategy and soldering details, please

download the ON Semiconductor Soldering and Mounting Techniques

Reference Manual, SOLDERRM/D.

 Semiconductor Components Industries, LLC, 2012

1

May, 2012 − Rev. 4

Publication Order Number:

ADT7467/D

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