ADT7475_1110 ONSEMI [ON Semiconductor], ADT7475_1110 Datasheet - Page 29
ADT7475_1110
Manufacturer Part Number
ADT7475_1110
Description
dbCOOL Remote Thermal Monitor and Fan Controller
Manufacturer
ONSEMI [ON Semiconductor]
Datasheet
1.ADT7475_1110.pdf
(58 pages)
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Recommended Implementation 1
system designer with the following features:
•
•
•
•
•
Configuring the ADT7475 as in Figure 44 provides the
Two PWM outputs for fan control of up to three fans.
(The front and rear chassis fans are connected in
parallel.)
Three TACH fan speed measurement inputs.
V
CPU core voltage measurement (V
VRM temperature using local temperature sensor.
CC
measured internally through Pin 3.
CHASSIS
CHASSIS
FRONT
REAR
FAN
FAN
TEMPERATURE
AMBIENT
CORE
Figure 44. Recommended Implementation 1
).
TACH2
PWM3
TACH3
D1+
D1–
http://onsemi.com
ADT7475
GND
SMBALERT
29
THERM
TACH1
PWM1
•
•
•
•
SDA
SCL
D2+
D2–
CPU temperature measured using the Remote 1
temperature channel.
Ambient temperature measured through the Remote 2
temperature channel.
Bidirectional THERM pin, which allows the monitoring
of PROCHOT output from an Intel Pentium 4 processor,
for example, or can be used as an overtemperature
THERM output.
SMBALERT system interrupt output.
PROCHOT
CPU FAN
ICH
CPU
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