ADT7463ARQZ-R7 datasheet(8/52 Pages) ONSEMI

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REV. C

–8–

ADT7463

TACH2

PWM3

TACH3

D1+

D1–

3.3VSB

12V/VID5

CURRENT

VCORE

GND

SMBALERT

ADT7463

SCL

SDA

THERM

D2+

D2–

VID[0:4]/VID[0:5]

TACH1

PWM1

ADP316x

VRM

CONTROLLER

FRONT

CHASSIS

FAN

REAR

CHASSIS

FAN

AMBIENT

TEMPERATURE

VCOMP

5(VRM9)/6(VRM10)

PROCHOT

Figure 2. Recommended Implementation

RECOMMENDED IMPLEMENTATION

Configuring the ADT7463 as in Figure 2 allows the systems

designer the following features:

• Six VID inputs (VID0 to VID5) for VRM10 support.

• 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.

• VCC measured internally through Pin 4.

• CPU core voltage measurement (VCORE).

• 2.5 V measurement input used to monitor CPU current

(connected to VCOMP output of ADP316x VRM controller).

This is used to determine CPU power consumption.

• 5 V measurement input.

• VRM temperature uses local temperature sensor.

• CPU temperature measured using Remote 1 temperature

channel.

• Ambient temperature measured through Remote 2 temperature

channel.

• If not using VID5, this pin can be reconfigured as the 12 V

monitoring input.

• Bidirectional THERM pin. Allows Intel Pentium 4 PROCHOT

monitoring and can function as an overtemperature THERM

output.

• SMBALERT system interrupt output.

See the AN-612 ADT7463 Configuration application note for more

information and register settings for all possible configurations

(www.analog.com/UploadedFiles/Application_Notes/408599520AN612_0.pdf).

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