ADM1029ARQZ-R7(2012) データシートの表示（PDF） - ON Semiconductor

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ADM1029ARQZ-R7
(Rev.:2012)

Dual PWM Fan Controller and Temperature Monitor for High Availability Systems

ON Semiconductor 

ADM1029

Dual PWM Fan Controller

and Temperature Monitor for

High Availability Systems

The ADM1029 is a versatile fan controller and monitor for use in

personal computers, servers, telecommunications equipment, or any

high-availability system where reliable control and monitoring of

multiple cooling fans is required. Each ADM1029 can control the

speed of one or two fans and can measure the speed of fans that have a

tachometer output. The ADM1029 can also measure the temperature

of one or two external sensing diodes or an internal temperature

sensor, allowing fan speed to be adjusted to keep system temperature

within acceptable limits. The ADM1029 has FAULT inputs for use

with fans that can signal failure conditions, and inputs to detect

whether or not fans are connected.

The ADM1029 communicates with the host processor over an

System Management (SMBus) serial bus. It supports eight different

serial bus addresses, so that up to eight devices can be connected to a

common bus, controlling up to sixteen fans. This makes software

support and hardware design scalable.

The ADM1029 has an interrupt output (INT) that allows it to signal

fault conditions to the host processor. It also has a separate, cascadable

fault output (CFAULT) that allows the ADM1029 to signal a fault

condition to other ADM1029s.

The ADM1029 has a number of useful features including an

automatic fan speed control option implemented in hardware with no

software requirement, automatic use of backup fans in the event of fan

failure, and supports hot-swapping of failed fans.

Features

 Software Programmable and Automatic Fan Speed Control

 Automatic Fan Speed Control Allows Control

 Independent of CPU Intervention after Initial Setup

 Control Loop Minimizes Acoustic Noise and Power Consumption

 Remote and Local Temperature Monitoring

 Dual Fan Speed Measurement

 Supports Backup and Redundant Fans

 Supports Hot Swapping of Fans

 Cascadable Fault Output Allows Fault Signaling between Multiple

ADM1029s

 Address Pin Allows Up to Eight ADM1029s in A System

 Small 24-lead QSOP Package

 This is a Pb-Free Device*

Applications

 Network Servers and Personal Computers

 Microprocessor-based Office Equipment

 High Availability Telecommunications Equipment

* 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

April, 2012 − Rev. 2

http://onsemi.com

QSOP 24

CASE 492B

PIN ASSIGNMENT

DRIVE1 1

FAULT1 2

TACH1 3

PRESENT1 4

SCL 5

SDA 6

GND 7

VCC 8

CFAULT 9

INT 10

GPIO2 11

RESET 12

24 DRIVE2

23 FAULT2

22 TACH2

21 PRESENT2

20 AIN1/GPIO1

19 AIN0/GPIO0

18 TMIN/INSTALL

17 D2+/GPIO6

16 D2−/GPIO5

15 ADD

14 D1+/GPIO4

13 D1−/GPIO3

ADM1029

Top View

(Not To Scale)

MARKING DIAGRAM

1029ARQZ

#YYWW

1029ARQZ

#

YYWW

= Special Device Code

= Pb-Free Package

= Date Code

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 49 of this data sheet.

Publication Order Number:

ADM1029/D

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