ADT7476A

更新时间： 2024-11-23 04:04:47

品牌	Logo	应用领域
亚德诺 - ADI		监视器控制器
页数	文件大小	规格书
72页	1373K
描述
dBCool Remote Thermal Controller and Voltage Monitor

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中文翻译

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数据手册

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ADT7476A 数据手册

dBCool^™Remote Thermal

Controller and Voltage Monitor

ADT7476A

FEATURES

GENERAL DESCRIPTION

Monitors up to five voltages

Improved TACH and PWM performance

Controls and monitors up to four fans

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

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.

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

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

input.

THERM

The ADT7476A also provides critical thermal protection to

the system using the bidirectional pin as an output

3-wire and 4-wire fan speed measurement

Limit comparison of all monitored values

5 V support on all TACH and PWM channels

Meets SMBus 2.0 electrical specifications

THERM

to prevent system or component overheating.

FUNCTIONAL BLOCK DIAGRAM

ADDR

ADDREN

SELECT SCL SDA SMBALERT

VID5/GPIO5

VID4/GPIO4

VID3/GPIO3

VID2/GPIO2

VID1/GPIO1

VID0/GPIO0

GPIO6

ADT7476A

SMBus

ADDRESS

SELECTION

VID/GPIO

SERIAL BUS

INTERFACE

ADDRESS

POINTER

PWM

REGISTERS

AND

CONTROLLERS

(HF AND LF)

PWM1

PWM2

PWM3

AUTOMATIC

FAN SPEED

CONTROL

PWM

CONFIGURATION

REGISTERS

TACH1

TACH2

TACH3

TACH4

INTERRUPT

MASKING

FAN

SPEED

COUNTER

PERFORMANCE

MONITORING

THERMAL

PROTECTION

THERM

INTERRUPT

STATUS

TO ADT7476A

ACOUSTIC

REGISTERS

ENHANCEMENT

CONTROL

D1+

D1–

D2+

D2–

LIMIT

COMPARATORS

INPUT

SIGNAL

10-BIT

ADC

CONDITIONING

AND

+5V

+12V

+2.5V

ANALOG

MULTIPLEXER

VALUE AND

LIMIT

REGISTERS

BAND GAP

REFERENCE

CCP

BAND GAP

TEMP. SENSOR

GND

Figure 1.

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registeredtrademarks arethe property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

12 3 4 5 6 7...72

中文翻译

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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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