W83L785R Datasheet, PDF (37/38 Pages) Winbond – WINBOND H/W MONITORING IC FOR NOTEBOOK

W83L785R/W83L785G
12. W83L785R SCHEMATICS
Rev.
0.1:W83L785R application circuit. VCC=3.3V
0.2:R29 30K change to 15K
0.3:R44,R45,R46 1K change to 4.7K
VCC
VCC
C1
10u/16V
C2
0.1u
} To chipset
EXTSMI#
THRM#
GPIO5
GPIO6
R13
4.7K
R1
4.7K
R14
4.7K
R2
4.7K
FANIN1
1
FANIN2
2
PWMOUT1 3
PWMOUT2 4
5
6
SMI#
7
OVT#
8
SCL
9
SDA
10
U1
FANIN1/GPIO1
FANIN2/GPIO2
PWMOUT1
VCC
VTIN1
VTIN2
20
19
18
17
PWMOUT2
GPIO5
VREF
VCORE/GPIO16
16
15
GPIO6
SMI#/GPIO7
+1.5V/GPIO15
+2.5V/GPIO14
14
13
OVT#/GPIO8
SCL
GPIO13
GND
12
11
SDA
TEMP_FAULT#/GPO11
W83785R
VTIN1
VTIN2
VREF
V1
V2
V3
GP13
VCC
VCC
R11
10K
TEMP_FAULT#
VOLTAGE SENSORING CIRCUIT
V1
V2
R16
10K
R17
R
10K
R18 100k
CPU_VCORE (max 2.048V)
1.5V
2.5V
V3
R19 100k
VCC
GP5
GP6
GP13
R44
4.7K
R45
4.7K
R46
4.7K
NOTE:
ALL GPIO PIN Must add pull-up resistor
TEMPERATURE SENSORING CIRCUIT
VREF
R29
R
15K 1%
{ From PII/PIII CPU
PIID+
PIID-
VTIN1
C4
CAP
3300p
VREF
R34 R
10K 1%
RT1
10K 1%
THERMISTOR
VTIN2
VCC
SDA
SCL
R40
0
R41
0
R38
4.7k
R39
4.7k
SMDAT
SMCLK
PWM1 Circuit for FAN1 speed Control _Fan5VCC
VCC
R20
4.7K
FOR 5V FAN
R21
4.7K
PWMOUT1
R26
100
PWMOUT1 is
open-drain default.
W83784R has SMARTFAN function
R22
1K
Q2
MOSFET N
C3
47u
Q1
3906
D1
1N4148
+ Signal
Power
GND
JP1
3
2
1
HEADER 3
R24
4.7K
R27
2K
FANIN1
R28
10K
PWM2 Circuit for FAN2 speed Control
VCC
R30
4.7K
Fan5VCC
FOR 5V FAN
PWMOUT2
R31
4.7K
R35
100
PWMOUT2 is
open-drain default.
W83784R has SMARTFAN function
R32
1K
Q4
MOSFET N
C5
47u
Q3
3906
D2
1N4148
+ Signal
Power
GND
JP2
3
2
1
HEADER 3
R33
4.7K
R36
2K
FANIN2
R37
10K
PWM1 Circuit for FAN1 speed Control _+12V
VCC
R20
4.7K
FOR 12V FAN
R21
4.7K
PWMOUT1
R26
100
PWMOUT1 is
open-drain default.
W83784R has SMARTFAN function
R22
1K
Q2
MOSFET N
C3
47u
Q1
3906
D1
1N4148
+ Signal
Power
GND
JP1
3
2
1
HEADER 3
R24
4.7K
R27
27K
FANIN1
R28
10K
PWM2 Circuit for FAN2 speed Control
+12V
VCC
R30
4.7K
FOR 12V FAN
PWMOUT2
R31
4.7K
R35
100
PWMOUT2 is
open-drain default.
W83784R has SMARTFAN function
R32
1K
Q4
MOSFET N
C5
47u
Q3
3906
D2
1N4148
+ Signal
Power
GND
JP2
3
2
1
HEADER 3
R33
4.7K
R36
27K
FANIN2
R37
10K
WINBOND ELECTRONICS CORP.
Title
W83L785R Application Circuit
Size
Document Number
Custom
785.SCH
Date:
Monday, July 02, 2001
Sheet
Rev
0.3
1
of
1
- 33 -
Publication Release Date: Apr. 2006
Revision 1.1