+12V
12V
R18
R19
4.7K
1K
Q1
PNP
NDS0605/SOT
D1
U2A
Q2
R20
1N4148
3
2
D2
+
-
4.7K
1
1N4148
4
HEADER
FANCTL1
FANCTL2
FANCTL3
4FANCTL
C8
R21
4
3
2
1
R22
27K
Q3
LM358
R26 10K
4.7K
+
FANIN1
R23
330
MOSFET N
JP2
FANCTL1
FANCTL
2N7002
10U
R24
10K
R25 27K
FANIN1
FANIN2
FANIN3
3
2
1
C9
C10
0.1U
47u
C11
JP1
0.1u R27
10K
R29
R30
0
CON3
4FANCTL
R28
3.9K
0
VCC5V
DC FAN Control with OP
1
R31 10K
PWM FAN
1
SPEED CONTROL
The C10 is reserved for FAN noise dis-bounce.
12V
+12V
R32
R33
4.7K
1K
NDS0605/SOT
U2B
Q4
Q5
5
6
D4
+
-
D3
PNP
7
1N4148
R34
1N4148
4.7K
R35
LM358
R40 10K
4.7K
C12
JP3
JP4
R36
27K
Q6
R37 27K
+
FANIN2
3
3
2
1
R38
330
MOSFET N
C13
47u
FANCTL2
2
1
2N7002
10U
R39
C14
10K
0.1u R41
10K
C15
0.1U
HEADER
3
CON3
R42
3.9K
PWM FAN
2
SPEED CONTROL
DC FAN Control with OP
2
The C13 is reserved for FAN noise dis-bounce.
12V
+12V
R43
R44
4.7K
1K
NDS0605/SOT
Q8
U3A
Q7
D5
1N4148
PNP
3
2
D6
+
-
R45
1
1N4148
4.7K
R46
C16
LM358
R51 10K
4.7K
JP5
R47
27K
Q9
+
JP6
FANIN3
3
R48
330
MOSFET N
R49 27K
FANCTL3
2
1
3
2
1
2N7002
10U
R50
10K
C17
47u
C18
C19
0.1U
0.1u R52
10K
HEADER
3
CON3
R53
3.9K
PWM FAN
3
SPEED CONTROL
DC FAN Control with OP
3
The C17 is reserved for FAN noise dis-bounce.
FAN CONTROL FOR PWM OR DC
Title
Feature Integration Technology Inc.
Size
B
Document Number
FAN Control
Rev
0.11
Date:
Monday , January 24, 2005
Sheet
2
of
4
D1+
C20 3300P
D+
D-
D1+
D-
R54
R55
10K
VIN1
VIN1
from CPU
VTT1.2V
100K
VIN2
VIN2
VRAM
D2+
C21 3300P
D2+
Q10
PNP
for
SYSTEM
R56 100K
R57
R60
R62
47K
VIN3
VIN4
VIN5
3906
VBAT
R59
VIN3
VIN4
VIN5
VCHIPSET
D-
D3+
C22 3300P
R58 100K
D3+
200K
200K
Q11
2M
SW1
PNP
for
SYSTEM
COPEN#
VCC5V
+12V
2
1
COPEN#
3906
C23
D-
1000P
R61 47K
R63 20K
DIODE SENSING CIRCUIT
CASE OPEN CIRCUIT
R64
R66
200K
10K
10K
VIN6
VIN7
VIN8
RT1
10K 1%
(for system)
VIN6
VIN7
VIN8
R65 10K 1%
VCC1.5V
VCORE
VREF
D1+
THERMISTOR
RT2
10K 1%
R67
R68 10K 1%
R70 10K 1%
VSB5V
VREF
D2+
(for system)
(for system)
THERMISTOR
R69 47K
RT3
10K 1%
VREF
D3+
THERMISTOR
VOLTAGE SENSING.
The best voltage input level is about 1V.
THERMISTOR SENSING CIRCUIT
Temperature Sensing
Title
Feature Integration Technology Inc
Size
B
Document Number
Hardware Monitor
Rev
0.1
Date:
Monday , January 24, 2005
Sheet
3
of
4
112
July, 2007
V0.28P
FINTEK [ FEATURE INTEGRATION TECHNOLOGY INC. ]
