參數(shù)資料
型號： MAX6644LBAAEE+T
廠商： Maxim Integrated
文件頁數(shù)： 1/17頁
文件大?。?/td> 208K
描述： IC CNTRLR FAN SPEED 16-QSOP
產(chǎn)品培訓模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝： 2,500
功能： 風扇控制，溫度監(jiān)控器
傳感器類型： 內(nèi)部和外部
感應溫度： -40°C ~ 125°C，外部傳感器
精確度： ±3.5°C 本地（最大），±3°C 遠程（最大）
拓撲： ADC，PWM 發(fā)生器，轉(zhuǎn)速計計數(shù)器
輸出類型： PWM
輸出警報： 是
輸出風扇： 是
電源電壓： 3 V ~ 5.5 V
工作溫度： -40°C ~ 125°C
安裝類型： 表面貼裝
封裝/外殼： 16-SSOP（0.154"，3.90mm 寬）
供應商設備封裝： 16-QSOP
包裝： 帶卷 (TR)
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 fans power supply. The
MAX6643/MAX6644/MAX6645 monitor temperature and
adjust the duty cycle of the PWM output waveform to con-
trol the fans speed according to the cooling needs of the
system. The MAX6643 monitors its own die temperature
and an optional external transistors 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癈 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 devices functions.
The MAX6643 and MAX6644 are available in a small
16-pin QSOP package and the MAX6645 is available in
a 10-pin 礛AX
?/DIV>
package. All versions operate from
3.0V to 5.5V supply voltages and consume 500礎 (typ)
supply current.
Applications
Networking Equipment
Storage Equipment
Servers
Desktop Computers
Workstations
Features
f Simple, Automatic Fan-Speed Control
f Internal and External Temperature Sensing
f Detect Fan Failure Through Locked-Rotor Output,
Tachometer Output, or Fan-Supply Current
Sensing
f Multiple, 1.6% Output Duty-Cycle Steps for Low
Audibility of Fan-Speed Changes
f Pin-Selectable or Factory-Selectable Low-
Temperature Fan Threshold
f Pin-Selectable or Factory-Selectable High-
Temperature Fan Threshold
f Spin-Up Time Ensures Fan Start
f Fan-Start Delay Minimizes Power-Supply Load at
Power-Up
f 32Hz PWM Output
f Controlled Duty-Cycle Rate-of-Change Ensures
Good Acoustic Performance
f 2?SPAN class="pst MAX6643LBFAEE-_2292765_4">C Temperature-Measurement Accuracy
f FULLSPD/FULLSPD Input Sets PWM to 100%
f Pin-Selectable OT Output Threshold
f 16-Pin QSOP and 10-Pin ?/SPAN>MAX Packages
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 Direct at 1-888-629-4642,
or visit Maxims website at www.maxim-ic.com.
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Pin Configurations, Typical Operating Circuit, and Selector
Guide appear at end of data sheet.
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX6643LBFAEE
-40癈 to +125癈   16 QSOP
E16-1
MAX6643LBBAEE
-40癈 to +125癈   16 QSOP
E16-1
MAX6644LBAAEE
-40癈 to +125癈   16 QSOP
E16-1
MAX6645ABFAUB    -40?/SPAN>C to +125?/SPAN>C   10 ?/SPAN>MAX
U10-2
礛AX is a registered trademark of Maxim Integrated Products, Inc.
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相關代理商/技術參數(shù)
參數(shù)描述
MAX6645AAFAUB 功能描述:馬達/運動/點火控制器和驅(qū)動器 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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
MAX6645AAFAUB-T 功能描述:馬達/運動/點火控制器和驅(qū)動器 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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
MAX6645ABFAUB 功能描述:馬達/運動/點火控制器和驅(qū)動器 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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
MAX6645ABFAUB+ 功能描述:馬達/運動/點火控制器和驅(qū)動器 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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
MAX6645ABFAUB+T 功能描述:馬達/運動/點火控制器和驅(qū)動器 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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
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