NCT6627UD Nuvoton Technology Corporation of America, NCT6627UD Datasheet - Page 58

• Manufacturer Part Number: NCT6627UD
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of NCT6627UD

• Lead Free Status / Rohs Status: Supplier Unconfirmed

If the current temperature rises higher than (Target Temperature 1 + Temperature Tolerance), the fan speed rises
one step again, and the target temperature shifts to (Target Temperature 1 + Temperature Tolerance), or Target
Temperature 2. This process repeats whenever the current temperature is higher than (Target Temperature X ±
Temperature Tolerance) or until the fan speed reaches its maximum speed.
(4) If the current temperature falls below (Target Temperature － Temperature Tolerance), the fan speed falls
one step. The step is the value in the CPUFANOUT Output Value Select Register, Bank0, Index 03h. In
addition, the target temperature shifts to (Target Temperature － Temperature Tolerance), creating a new
target temperature named Target Temperature 1.This is illustrated in the figure below.
Max. Fan Output
Max. Fan Output
(DC / PWM)
(DC / PWM)
Min. Fan Output
Min. Fan Output
Fan output
Fan output
Output Value
Output Value
Fan Initial
Fan Initial
Figure 7-15 S
Current Temp. > Target Temp. + Tol .
Current Temp. > Target Temp. + Tol .
MART
F
AN
TM
III Mechanism (Current Temp. > Target Temp. + Tol.)
Tar
Tar
Tar 1
Tar 1
Tar 2
Tar 2
Tolerance
Tolerance
-49-
Tar 3
Tar 3
W83627UHG/NCT6627UD
Tar 4
Tar 4
Tar 5
Tar 5
Publication Release Date: October 26, 2010
Temperature
Temperature
Step
Step
Revision 1.7