w83795g Winbond Electronics Corp America, w83795g Datasheet - Page 100

• Manufacturer Part Number: w83795g
• Description: Nuvoton H/w Monitor
• Manufacturer: Winbond Electronics Corp America

In addition, S
temperature exceeds Critical Temperature, Fan Output outputs DC/PWM7 value, no matter what the
slope is. Once the temperature exceeds Critical Temperature, Fan Output value will be determined in
accordance to the slope only when the temperature falls below (TCritical – Criticl Hyst.)
Temperuatre 2 says, “No fast fan needed”. The W83795G/ADG will take request of TD1 and start to
speed up the fan. In short, the W83795G/ADG always takes the most critical request and applies it to
the related fan.
Temperature 1
Temperature 2
Temperature 3
Temperature 4
Temperature 5
Temperature 6
hold current speed??
Any Temp request f
Any Temp request
faster Fan??
No
No
MART
F
Yes
Yes
AN
TM
Hold current
Slow Down
IV can also set up Critical Temperature and Hysteresis. If the current
Speed Up
Speed
Fan1
Fan2
Fan3
Fan4
Fan5
Fan6
Fan7
Fan8
The right graph gives a picture of how the mapping relationship is
made by this setting.
Temperature 1 and Temperature 2, and decides the next fan
output value applied to Fan2. To speed up or to slow down the fan
is based on the analysis of the W83795G/ADG. Basically, the
W83795G/ADG sorts and analyzes the information from each
temperature sensor and SmartFan Controls. The analysis may be
like, “Temperature 1 needs to speed up the fan”; “Temperautre 2
does not need so fast fan speed”; “Temperuatre 1 does not need
fast fans any more”, and “Temperautre 2 hopes to keep the
current fan speed”. Then, the algorithm will make a decision to
control the fan by the following simple rule.
In
TargetTemp
this
If Temperautre 1 says, “I need a faster fan”, and
- 100 –
example,
Speed Up
Keep Speed
Speed Down
Fan2
retrieves
W83795G/ADG
information
Revision 1.41
Aug/2/2010
from