ADT7473_11 ONSEMI [ON Semiconductor], ADT7473_11 Datasheet - Page 32
ADT7473_11
Manufacturer Part Number
ADT7473_11
Description
dbCOOL Remote Thermal Monitor and Fan Control
Manufacturer
ONSEMI [ON Semiconductor]
Datasheet
1.ADT7473_11.pdf
(74 pages)
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Step 1: Hardware Configuration
control capabilities should be addressed early in the design
stages. Decisions about how these capabilities are used
should involve the system thermal/mechanical engineer.
Consider the following questions:
During system design, the motherboard sensing and
1. What ADT7473/ADT7473−1 functionality will be
used?
•
•
•
temperature THERM function? The ADT7473/
ADT7473−1 offers multifunctional pins that can
be reconfigured to suit different system
requirements and physical layouts. These
multifunction pins are software programmable.
TACH4 fan speed measurement or over−
PWM2 or SMBALERT for ADT7473?
THERM_LATCH or PWM2 for ADT7473−1?
Figure 48. Hardware Configuration Example
http://onsemi.com
32
measurement channels to particular system thermal zones.
For example, locating the ADT7473/ADT7473−1 close to
the VRM controller circuitry allows the VRM temperature
to be monitored using the local temperature channel.
This influences the assignment of the temperature
2. How many fans will be supported in the system,
3. Is the CPU fan to be controlled using the
4. Where will the ADT7473/ADT7473−1 be
three or four? This influences the choice of
whether to use the TACH4 pin or to reconfigure it
for the THERM function.
ADT7473/ADT7473−1 or will it run at full speed
100% of the time?
If run at full speed, 100% of the time, this frees up
a PWM output, but the system is louder.
physically located in the system?
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