W83782D Datasheet, PDF (72/73 Pages) Winbond – MONITORING IC

Temperature Sensing
VREF
R39 R
10K 1%
R40 R
10K 1%
R41 R
10K 1%
RT3
10K 1%
THERMISTOR
RT2
10K 1%
THERMISTOR
RT1
10K 1%
THERMISTOR
T1
T2
T3
GNDA
Measuring temperature by either
thermistor or diode.
(for system)
(for cpu1)
(for cpu2)
VREF
T1
GNDA
VREF
T2
GNDA
VREF
T3
GNDA
R42 R
30K 1%
CAPACITOR
R43
R
30K 1%
CAPACITOR
R44 R
30K 1%
CAPACITOR
C5
3300p
C6
3300p
C7
3300p
Choosing the more accurate measuring method
between the above is recommanded.
Q2
NPN
3904
(for system)
D+
(from PII CPU)
D-
Q3
NPN
3904
(for cpu2)
PWM Circuit for FAN speed control
PWMOUT1
R54 R
510/782D
R59 R
4.7K/782D
R58 R
1K/782D
Q7
PNP
3906/782D
Q6
C9
47u/782D
+
MOSFET N
2N7002/782D
+12V
R60
0/781DR
D1
DIODE
1N4148
R61 R
0/782D
JP2
3
2
1
HEADER 3
R45
R
4.7K
R46 R
27K
R47
R
10K
PWMOUT2
R55 R
510/782D
R57 R
4.7K/782D
R56 R
1K/782D
Q4
MOSFET N
2N7002/782D
+12V
Q5
PNP
3906/782D
R62
0/781D R
D2
DIODE
1N4148
+ C8
R63 R
0/782D
47u/782D
JP1
3
2
1
HEADER 3
R48
R
4.7K
R49 R
27K
R50
R
10K
FAN1IN
FAN2IN
+12V
D3
DIODE
1N4148
JP3
3
2
1
HEADER 3
R51
R
4.7K
R52 R
27K
R53
R
10K
FAN3IN
Case Open Circuits
R65
R
VBAT
R68
R
R17
R
10M/782D
S1
0/782D
R64
R
0/782D
CASEOPEN SW
0/781D
CASEOPEN#
C10
CAP
1000p
/781D
R66
R
0/781D
These two inverters consume VBAT
74HC14
/781D
U2A
1
2
R69
R
10K/781D
R70
R
0/781D
R67
R
2.2M/781D
U2B
4
3
74HC14
/781D
CASEOPEN
Winbond Electronic Corp.
Title
W83781D-W83782D Application Circuit
Size
Document Number
Custom
Date: Wednesday, July 22, 1998
Sheet
2
of
Rev
0.3
2