Datasheet > ADT7475

ADT7475

更新时间： 2024-01-02 22:18:42

品牌	Logo	应用领域
亚德诺 - ADI		风扇监控控制器
页数	文件大小	规格书
68页	2304K
描述
dBCool Remote Thermal Monitor and Fan Controller

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技术参数
数据手册

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ADT7475 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Transferred	零件包装代码：	SSOP
包装说明：	ROHS COMPLIANT, MO-137-AB, QSOP-16	针数：	16
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.29
模拟集成电路 - 其他类型：	ANALOG CIRCUIT	JESD-30 代码：	R-PDSO-G16
JESD-609代码：	e3	长度：	4.9 mm
湿度敏感等级：	1	功能数量：	1
端子数量：	16	最高工作温度：	125 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	SSOP	封装等效代码：	SSOP16,.25
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, SHRINK PITCH
峰值回流温度（摄氏度）：	260	电源：	3.3 V
认证状态：	Not Qualified	座面最大高度：	1.7526 mm
子类别：	Motion Control Electronics	最大供电电流 (Isup)：	3 mA
最大供电电压 (Vsup)：	3.6 V	最小供电电压 (Vsup)：	3 V
标称供电电压 (Vsup)：	3.3 V	表面贴装：	YES
温度等级：	AUTOMOTIVE	端子面层：	MATTE TIN
端子形式：	GULL WING	端子节距：	0.635 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	40
宽度：	3.9116 mm

ADT7475 数据手册

dBCool^®Remote Thermal

Monitor and Fan Controller

ADT7475

FEATURES

GENERAL DESCRIPTION

Controls and monitors up to 4 fans

The ADT7475 dBCool controller is a thermal monitor and

multiple PWM fan controller for noise-sensitive or power-

sensitive applications requiring active system cooling. The

ADT7475 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.

High and low frequency fan drive signal

1 on-chip and 2 remote temperature sensors

Extended temperature measurement range, up to 191°C

Automatic fan speed control mode controls 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

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 ADT7475 also provides critical thermal protection to the

system using the bidirectional pin as an output to

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)

THERM

prevent system or component overheating.

Fully RoHS compliant

FUNCTIONAL BLOCK DIAGRAM

SCL SDA SMBALERT

ADT7475

SERIAL BUS

INTERFACE

PWM

PWM1

REGISTERS

AND

ACOUSTIC

ENHANCEMENT

CONTROL

AUTOMATIC

FAN SPEED

CONTROL

PWM2

PWM3

CONTROLLERS

(HF AND LF)

ADDRESS

POINTER

PWM

TACH1

TACH2

TACH3

TACH4

CONFIGURATION

REGISTERS

FAN

SPEED

COUNTER

INTERRUPT

MASKING

PERFORMANCE

MONITORING

INTERRUPT

STATUS

REGISTERS

THERMAL

PROTECTION

THERM

TOADT7475

D1+

D1–

D2+

D2–

INPUT

SIGNAL

LIMIT

10-BIT

ADC

COMPARATORS

CONDITIONING

AND

ANALOG

MULTIPLEXER

VALUE AND

LIMIT

REGISTERS

CCP

BAND GAP

REFERENCE

BAND GAP

TEMPERATURE

SENSOR

GND

Figure 1.

Rev. A

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

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