ADT7475 Analog Devices, Inc., ADT7475 Datasheet - Page 35

• Manufacturer Part Number: ADT7475
• Description: Dbcool Remote Thermal Monitor And Fan Controller
• Manufacturer: Analog Devices, Inc.

ADT7475
Recommended Implementation 1
Configuring the ADT7475 as in Figure 45 provides the system
designer with the following features:
•
•
•
•
•
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 45. Recommended Implementation 1
TACH2
PWM3
TACH3
D1+
D1–
Rev. B | Page 35 of 68
ADT7475
GND
SMBALERT
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