參數(shù)資料
型號(hào)： MAX6645ABFAUB+T
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 模擬信號(hào)調(diào)理
英文描述： Automatic PWM Fan-Speed Controllers with Overtemperature Output
中文描述： SPECIALTY ANALOG CIRCUIT, PDSO10
封裝： 3 X 3 MM, ROHS COMPLIANT, MO-187CBA, MICRO, SOP-10
文件頁(yè)數(shù)： 1/19頁(yè)
文件大?。?/td> 630K
代理商： MAX6645ABFAUB+T
General Description
The MAX6643/MAX6644/MAX6645 monitor temperature
and automatically adjust fan speed to ensure optimum
cooling while minimizing acoustic noise from the fan.
Each device measures two temperature locations.
The MAX6643/MAX6644/MAX6645 generate a PWM
waveform that drives an external power transistor, which
in turn modulates the fan’s power supply. The
MAX6643/MAX6644/MAX6645 monitor temperature and
adjust the duty cycle of the PWM output waveform to con-
trol the fan’s speed according to the cooling needs of the
system. The MAX6643 monitors its own die temperature
and an optional external transistor’s temperature, while the
MAX6644 and MAX6645 each monitor the temperatures
of one or two external diode-connected transistors.
The MAX6643 and MAX6644 have nine selectable trip
temperatures (in 5
°C increments). The MAX6645 is fac-
tory programmed and is not pin selectable.
All versions include an overtemperature output (OT).
OT can be used for warning or system shutdown. The
MAX6643 also features a FULLSPD input that forces the
PWM duty cycle to 100%. The MAX6643/MAX6644/
MAX6645 also feature a FANFAIL output that indicates
a failed fan. See the Selector Guide for a complete list
of each device’s functions.
The MAX6643 and MAX6644 are available in a small
16-pin QSOP package and the MAX6645 is available in
a 10-pin MAX package. All versions operate from
3.0V to 5.5V supply voltages and consume 500A (typ)
supply current.
Applications
Networking Equipment
Storage Equipment
Servers
Desktop Computers
Workstations
Features
Simple, Automatic Fan-Speed Control
Internal and External Temperature Sensing
Detect Fan Failure Through Locked-Rotor Output,
Tachometer Output, or Fan-Supply Current
Sensing
Multiple, 1.6% Output Duty-Cycle Steps for Low
Audibility of Fan-Speed Changes
Pin-Selectable or Factory-Selectable Low-
Temperature Fan Threshold
Pin-Selectable or Factory-Selectable High-
Temperature Fan Threshold
Spin-Up Time Ensures Fan Start
Fan-Start Delay Minimizes Power-Supply Load at
Power-Up
32Hz PWM Output
Controlled Duty-Cycle Rate-of-Change Ensures
Good Acoustic Performance
2°C Temperature-Measurement Accuracy
FULLSPD/FULLSPD Input Sets PWM to 100%
Pin-Selectable OT Output Threshold
16-Pin QSOP and 10-Pin MAX Packages
MAX6643/MAX6644/MAX6645
Automatic PWM Fan-Speed Controllers with
Overtemperature Output
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
19-3305; Rev 2; 3/07
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Pin Configurations, Typical Operating Circuit, and Selector
Guide appear at end of data sheet.
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX6643LBFAEE
-40
°C to +125°C 16 QSOP
E16-1
MAX6643LBBAEE
-40
°C to +125°C 16 QSOP
E16-1
MAX6644LBAAEE
-40
°C to +125°C 16 QSOP
E16-1
MAX6645ABFAUB
-40
°C to +125°C 10 MAX
U10-2
MAX is a registered trademark of Maxim Integrated Products, Inc.
相關(guān)PDF資料
PDF描述
MAX6645BAFAUB+ Automatic PWM Fan-Speed Controllers with Overtemperature Output
MAX6645BAFAUB+T Automatic PWM Fan-Speed Controllers with Overtemperature Output
MAX6646MUA+ +145°C Precision SMBus-Compatible Remote/Local Sensors with Overtemperature Alarms
MAX6646MUA+T +145°C Precision SMBus-Compatible Remote/Local Sensors with Overtemperature Alarms
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX6645BAFAUB 制造商:Maxim Integrated Products 功能描述:AUTOMATIC PWM FAN-SPEED CONTROLLERS WITH OVER - Rail/Tube
MAX6645BAFAUB+ 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Automatic PWM Fan Speed Controller RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
MAX6645BAFAUB+T 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Automatic PWM Fan Speed Controller RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
MAX6646MUA 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
MAX6646MUA+ 功能描述:板上安裝溫度傳感器 145C SMBus-Comp Remote/Local Sensor RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
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