W83697HG-TR Nuvoton Technology Corporation of America, W83697HG-TR Datasheet - Page 30
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W83697HG-TR
Manufacturer Part Number
W83697HG-TR
Description
Manufacturer
Nuvoton Technology Corporation of America
Datasheet
1.W83697HG-TR.pdf
(109 pages)
Specifications of W83697HG-TR
Lead Free Status / RoHS Status
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6.4.2
The W83697HF provides 2 sets for fan PWM speed control. The duty cycle of PWM can be
programmed by a 8-bit registers which are defined in the Bank0 CR5A and CR5B. The default duty
cycle is set to 100%, that is, the default 8-bit registers is set to FFh. The expression of duty can be
represented as follows.
The PWM clock frequency also can be program and defined in the Bank0.CR5C . The application
circuit is shown as follows.
Fan speed control
Duty cycle
−
PWM Clock Input
(%)
=
Programmed 8 - bit Register Value
G
D
S
R1
NMOS
Figure 9.5
- 27 -
+12V
R2
255
+
-
PNP Transistor
C
Publication Release Date: May 30, 2005
FAN
W83697HF/ HG
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Revision A1
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