ADT7476A

更新时间： 2024-11-23 06:36:27

品牌	Logo	应用领域
安森美 - ONSEMI		监视器控制器
页数	文件大小	规格书
67页	601K
描述
dBCOOL Remote Thermal Controller and Voltage Monitor

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ADT7476A 数据手册

ADT7476A

dBCOOL^RRemote Thermal

Controller and Voltage

Monitor

The ADT7476A dBCOOL controller is a thermal monitor

and multiple PWM fan controller for noise-sensitive or

power-sensitive applications requiring active system cooling. The

ADT7476A can drive a fan using either a low or high frequency drive

signal and can monitor the temperature of up to two remote sensor

diodes plus its own internal temperature. The part also measures and

controls the speed of up to four fans, so the fans 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. The effectiveness of the system’s thermal

solution can be monitored using the THERM input. The ADT7476A

also provides critical thermal protection to the system using the

bidirectional THERM pin as an output to prevent system or

component overheating.

MARKING DIAGRAMS

ADT7476AARQZ

#YYWW

Features

• Monitors Up to Five Voltages

• Improved TACH and PWM Performance

• Controls and Monitors Up to Four Fans

xxxx

• High and Low Frequency Fan Drive Signal

• One On-Chip and Two Remote Temperature Sensors

• Extended Temperature Measurement Range Up to 191°C

• Automatic Fan Speed Control Mode Controls System Cooling Based

on Measured Temperature

= Specific Device Code

= Pb−Free Package

YYWW = Date Code

xxxx

= Assembly Lot Code

• Enhanced Acoustic Mode Dramatically Reduces User Perception of

Changing Fan Speeds

PIN ASSIGNMENT

SDA

SCL

GND

PWM1/XTO

• Thermal Protection Feature via THERM Output

• Monitors Performance Impact of Intel® Pentium® 4 Processor

• Thermal Control Circuit via THERM Input

• 3-Wire and 4-Wire Fan Speed Measurement

• Limit Comparison of All Monitored Values

• 5.0 V Support on all TACH and PWM Channels

• Meets SMBus 2.0 Electrical Specifications

• These are Pb−Free Devices

CCP

+2.5V /THERM

+12V /VID5

VID0/GPIO0

VID1/GPIO1

VID2/GPIO2

VID3/GPIO3

TACH3

+5V

VID4/GPIO4

D1+

ADT7476A

D1-

D2+

PWM2/

SMBALERT

D2-

TACH4/THERM/SMBALERT/

GPIO6/ADDR SELECT

PWM3/ADDREN

TACH1 11

TACH2

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 66 of this data sheet.

Publication Order Number:

May, 2010 − Rev. 3

ADT7476A/D

12 3 4 5 6 7...67

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与ADT7476A相关器件

型号	品牌	获取价格	描述	数据表
ADT7476AARQZ	ONSEMI	获取价格	dBCOOL Remote Thermal Controller and Voltage Monitor
ADT7476AARQZ	ADI	获取价格	dBCool Remote Thermal Controller and Voltage Monitor
ADT7476AARQZ-R	ONSEMI	获取价格	dBCOOL Remote Thermal Controller and Voltage Monitor
ADT7476AARQZ-REEL	ADI	获取价格	dBCool Remote Thermal Controller and Voltage Monitor
ADT7476AARQZ-REEL7	ADI	获取价格	dBCool Remote Thermal Controller and Voltage Monitor
ADT7476AARQZ-RL7	ONSEMI	获取价格	dBCOOL Remote Thermal Controller and Voltage Monitor
ADT7476ARQH	ONSEMI	获取价格	dBCOOL Remote Thermal Controller and Voltage Monitor
ADT7476ARQH-REEL	ONSEMI	获取价格	dBCOOL Remote Thermal Controller and Voltage Monitor
ADT7476ARQZ	ONSEMI	获取价格	dBCOOL Remote Thermal Controller and Voltage Monitor
ADT7476ARQZ	ADI	获取价格	dBCool Remote Thermal Controller and Voltage Monitor

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