ADT7473_11 ONSEMI [ON Semiconductor], ADT7473_11 Datasheet

ADT7473_11

Manufacturer Part Number

ADT7473_11

Description

dbCOOL Remote Thermal Monitor and Fan Control

Manufacturer

ONSEMI [ON Semiconductor]

Datasheet

1.ADT7473_11.pdf (74 pages)

Current page: 1 of 74
Download datasheet (2Mb)

ADT7473

dbCOOLt Remote Thermal

Monitor and Fan Control

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.

given temperature. A unique dynamic T

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.

FEATURES

•

October, 2011 − Rev. 7

The ADT7473/ADT7473−1 dbCOOL controller is a thermal

The automatic fan speed control loop optimizes fan speed for a

Acoustics

on Measured Temperature

Changing Fan Speeds

(Fully SMBus 1.1 Compliant)

Compliant

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 T

Automatic Fan Speed Control Mode Controls System Cooling Based

Enhanced Acoustic Mode Dramatically Reduces User Perception of

Thermal Protection Feature via THERM Output

Monitors Performance Impact of Intel Pentium

Thermal Control Circuit via THERM Input

3−Wire and 4−Wire Fan Speed Measurement

Limit Comparison of All Monitored Values

Meets SMBus 2.0 Electrical Specifications

These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS

MIN

Control Mode Intelligently Optimizes System

MIN

control mode enables the

4 Processor

See detailed ordering and shipping information in the package

dimensions section on page 73 of this data sheet.

THERM_LATCH/

PWM3/ADDREN

ADDR SELECT

SMBALERT

ADT7473

TACH3/

#YYWW

ADT747

ORDERING INFORMATION

TACH1

TACH2

3ARQZ

TACH3

PWM2/

TACH1

TACH2

PWM3

PWM2

YYWW = Date Code

xxxx

GND

SCL

MARKING DIAGRAMS

PIN ASSIGNMENTS

http://onsemi.com

= Pb−Free Package

= Assembly Lot

ADT7473−1

ADT7473

TOP VIEW

Publication Order Number:

CASE 492

QSOP−16

ADT7473−1

7473−1

ARQZ

ADT

xxxx

SDA

PWM1/XTO

D1+

D1–

D2+

D2–

TACH4/GPIO/THERM

SMBALERT

SDA

PWM1/XTO

D1+

D1–

D2+

D2–

TACH4/GPIO/THERM

SMBALERT

CCP

ADT7473/D

Related parts for ADT7473_11

Related keywords

ADT7473_11 datasheet
ADT7473_11 data sheet
ADT7473_11 pdf datasheet
ADT7473_11 component
ADT7473_11 part
ADT7473_11 distributor
ADT7473_11 RoHS
ADT7473_11 datasheet download