ADT7476 Analog Devices, Inc., ADT7476 Datasheet - Page 39

• Manufacturer Part Number: ADT7476
• Description: Dbcool Remote Thermal Controller And Voltage Monitor
• Manufacturer: Analog Devices, Inc.

Recommended Implementation 1
Configuring the ADT7476 as shown in Figure 49 provides the
system designer with 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.
V
CPU core voltage measurement (V
2.5 V measurement input used to monitor CPU current
(connected to V
This is used to determine CPU power consumption.
5 V measurement input.
CC
measured internally through Pin 4.
AMBIENT TEMP
REMOTE 1 =
REMOTE 2 =
VRM TEMP
CPU TEMP
LOCAL =
COMP
output of an ADP316x VRM controller).
THERMAL CALIBRATION
THERMAL CALIBRATION
THERMAL CALIBRATION
T
T
T
MIN
MIN
MIN
CORE
T
T
T
).
RANGE
RANGE
RANGE
100%
100%
100%
0%
0%
0%
Figure 48. Hardware Configuration Example
MUX
Rev. B | Page 39 of 72
PWM
PWM
PWM
MIN
MIN
MIN
•
•
•
•
•
•
CONFIG
CONFIG
CONFIG
TACHOMETER 1
TACHOMETER 2
TACHOMETER 3
MEASUREMENT
MEASUREMENT
MEASUREMENT
PWM
PWM
PWM
GENERATOR
GENERATOR
GENERATOR
VRM temperature using local temperature sensor.
CPU temperature measured using the Remote 1
temperature channel.
Ambient temperature measured through the Remote 2
temperature channel.
If not using VID5, it can be reconfigured as the 12 V
monitoring input.
Bidirectional THERM pin 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.
AND 4
PWM
PWM
PWM
ENHANCEMENT)
ENHANCEMENT)
ENHANCEMENT)
(ACOUSTIC
(ACOUSTIC
(ACOUSTIC
CONTROL
CONTROL
CONTROL
RAMP
RAMP
RAMP
PWM1
TACH1
PWM2
TACH2
PWM3
TACH3
FRONT CHASSIS
REAR CHASSIS
CPU FAN SINK
ADT7476