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General Description
The MAX6665 is a fully integrated thermal switch with
an internal power transistor for driving a cooling fan
rated up to 24V and 250mA. When the MAX6665s tem-
perature rises above a factory-programmed threshold,
the FANOUT pin becomes active and powers the fan.
The MAX6665 is available with factory-programmed fan
activation threshold temperatures from +40癈 to +70癈
in 5癈 increments. Accuracy of the fan activation trip
point is ?癈 (typ) and ?癈 (max). The trip points hys-
teresis is pin selectable to 1癈, 4癈, or 8癈. Two open-
drain logic outputs indicate overtemperature con-
ditions: WARN is activated when the temperature is
15癈 above the fan activation threshold, and OT is acti-
vated when the temperature is 30癈 above the thresh-
old. These features can be used to safely power down
systems that are overheated.
The MAX6665 operates from a +2.7V to +5.5V power
supply, and the associated fan can be powered from
4.5V to 24V. It is available in an 8-pin SO package and
operates from -40癈 to +125癈.
Applications
Notebook and Desktop Computers
Servers
PC Power Supplies
Laboratory Instruments
Card Racks
Features
o On-Chip 250mA Fan Switch
o No External Components Required
o Factory-Programmed Thresholds
o Two Overtemperature Warning Signals
o Pin-Selectable 1?/SPAN>C, 4?/SPAN>C, and 8?/SPAN>C Hysteresis
o Low 65?/SPAN>A Supply Current
Fan Controller/Driver with Factory-
Programmed Temperature Thresholds
________________________________________________________________ Maxim Integrated Products   1
FANON
1
2
8
7   V
DD
HYST
GND
SO
TOP VIEW
3
4
6
5
MAX6665
FORCEON
FANOUT
WARN
OT
Pin Configuration
V
DD
FANON
GND
HYST
V
DD
+3.3V
 +4.5V TO +24V
100mA TO 250mA
COOLING FAN
100k&
1礔
MAX6665
FORCEON
FANOUT
WARN
OT
V
DD
100k&
Typical Operating Circuit
19-2056; Rev 0; 5/01
Ordering Information
PART
TEMP.
RANGE
PIN-
PACKAGE
THRESHOLD
MAX6665ASA40
-40癈 to
+125癈
8 SO-EP*
40癈
MAX6665ASA45
-40癈 to
+125癈
8 SO-EP*
45癈
MAX6665ASA50
-40癈 to
+125癈
8 SO-EP*
50癈
MAX6665ASA55
-40癈 to
+125癈
8 SO-EP*
55癈
MAX6665ASA60
-40癈 to
+125癈
8 SO-EP*
60癈
MAX6665ASA65
-40癈 to
+125癈
8 SO-EP*
65癈
MAX6665ASA70
-40癈 to
+125癈
8 SO-EP*
70癈
*Exposed paddle
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxims website at www.maxim-ic.com.
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相关代理商/技术参数
MAX6665ASA45+T 功能描述:马达/运动/点火控制器和驱动器 Fan Controller Driver RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube
MAX6665ASA45-T 功能描述:马达/运动/点火控制器和驱动器 RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube
MAX6665ASA50 功能描述:马达/运动/点火控制器和驱动器 RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube
MAX6665ASA50+ 功能描述:马达/运动/点火控制器和驱动器 Fan Controller Driver RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube
MAX6665ASA50+T 功能描述:马达/运动/点火控制器和驱动器 Fan Controller Driver RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube
MAX6665ASA50-T 功能描述:马达/运动/点火控制器和驱动器 RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube
MAX6665ASA55 功能描述:马达/运动/点火控制器和驱动器 RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube
MAX6665ASA55+ 功能描述:马达/运动/点火控制器和驱动器 Fan Controller Driver RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube