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參數資料
| 型號： | MAX6670 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Remote Temperature Switches with Integrated Fan Controller/Driver |
| 中文描述： | 遠端溫度開關，集成風扇控制器/驅動器 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 217K |
| 代理商： | MAX6670 |
General Description
The MAX6668/MAX6670 remote-junction thermal
switches with an internal power transistor drive a cool-
ing fan rated for supply voltages up to +12V and
250mA. These devices measure the temperature of an
external P-N junction (typically a diode-connected tran-
sistor) and turn on the fan power switch when the
remote temperature rises above a factory-programmed
threshold. Self-contained and requiring no software
development, the MAX6668/MAX6670 are simple
“drop-in” fan-control solutions for a variety of systems.
The MAX6670 features an open-drain
WARN
output
that goes active when the remote temperature exceeds
the factory-programmed fan activation threshold by
+15°C. The MAX6670 features an open-drain
OT
output
that goes active when the remote temperature exceeds
the factory-programmed threshold by +30°C. The
MAX6668/MAX6670 provide a fan-control input,
FORCEON
, that allows the fan to be driven externally,
regardless of temperature.
Available temperature thresholds range from +40°C to
+75°C in 5°C increments. Hysteresis is preset to 8°C on
the MAX6668 or pin selectable to 4°C, 8°C, or 12°C
using a three-level logic input on the MAX6670.
Temperature threshold accuracy is ±1°C (typ) and
±2.2°C (max) for remote-junction temperatures from
+40°C to +75°C.
The MAX6668/MAX6670 operate from a +3V to +3.6V
power supply, and are specified over the automotive
temperature range (-40°C to +125°C). The MAX6668 is
offered in an 8-pin μMAX package and the MAX6670 is
available in a space-saving 10-pin μMAX package.
Applications
Notebook and Desktop Computers
Network Switches
PC Power Supplies
Laboratory Instruments
Card Racks
Temperature Alarms
Fan Controls
Features
o
+12V, 250mA Integrated Fan Driver
o
No Calibration Required
o
Pin-Selectable 4°C, 8°C, or 12°C Hysteresis
(MAX6670)
o
Factory-Programmed Temperature Thresholds
from +40°C to +75°C
o
Overtemperature Warning Signals
o
110μA (typ) Supply Current
o
Space-Saving 8-Pin and 10-Pin μMAX Packages
M
Remote Temperature Switches with Integrated
Fan Controller/Driver
________________________________________________________________
Maxim Integrated Products
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.
1
DXP
GND
PGND
HYST
V
DD
10k
MAX6670
FORCEON
FANOUT
WARN
OT
V
DD
10k
DXN
V
DD
C
S
2200pF
2N3904
250mA
FAN
+3.3V
V
DD
+12V
Typical Application Circuit
Ordering Information
19-2133; Rev 2; 11/02
Pin Configuration appears at end of data sheet.
Typical Operating Circuit appears at end of data sheet.
Ordering Information continued at end of data sheet.
PART
TEMP
RANGE
PI N
PA C K A G E
T H R ESH
O L D
(
°
C
MAX6668
AUA40 -40
°
C to +125
°
C
MAX6668AUA45 -40
°
C to +125
°
C
MAX6668AUA50 -40
°
C to +125
°
C
MAX6668AUA60 -40
°
C to +125
°
C
MAX6668AUA70 -40
°
C to +125
°
C
MAX6668AUA75 -40
°
C to +125
°
C
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
40
45
50
60
70
75
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| MAX6668AUA45 | Remote Temperature Switches with Integrated Fan Controller/Driver |
| MAX6668AUA70 | Remote Temperature Switches with Integrated Fan Controller/Driver |
| MAX6668AUA75 | Remote Temperature Switches with Integrated Fan Controller/Driver |
| MAX6670AUB45 | ER 20C 20#16 PIN RECP |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX6670AUB040 | 制造商:Maxim Integrated Products 功能描述:REMOTE TEMPERATURE SWITCHES WITH INTEGRATED F - Bulk |
| MAX6670AUB045 | 制造商:Maxim Integrated Products 功能描述:REMOTE TEMPERATURE SWITCHES WITH INTEGRATED F - Bulk |
| MAX6670AUB050 | 制造商:Maxim Integrated Products 功能描述:REMOTE TEMPERATURE SWITCHES WITH INTEGRATED F - Bulk |
| MAX6670AUB055 | 制造商:Maxim Integrated Products 功能描述:REMOTE TEMPERATURE SWITCHES WITH INTEGRATED F - Bulk |
| MAX6670AUB060 | 制造商:Maxim Integrated Products 功能描述:REMOTE TEMPERATURE SWITCHES WITH INTEGRATED F - Bulk |
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