W83792AD/AG/D/G
D
A
B
C
58`C
55`C
52`C
Fan Start = 20%
100
50
0
Fan Start = 20%
Fan Stop = 10%
PWM
Duty
Cycle
Figure 7-2.
Of course, Smart Fan control system can be disabled and the fan speed control algorithm can be
programmed by BIOS or application software.
7.7.4 Smart FanTM II Control
W83792D/G provide 4 temperature point each can auto control PWM or DC fan mode. Each Temp
maps
Different fan out level, the relationship is shown as follow:
Fan Duty Cycle
Temp. Tolerance
Fan Duty Cycle 100%
Fan Duty Cycle Level 3
Fan Duty Cycle Level 2
Fan Duty Cycle Level 1
Non-Stop Duty Cycle
Temperature
Temp. 1
Temp.2
Temp.3
Temp.4
Figure 8. Smart Fan II behavior
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