ViewSonic VTMS2431 - Schematic Diagrams

8.1. System Power
Vout=VFB*(1+RA/RB)
VFB=0.8V
RB=0.7K~5Kohm
1.2V Core Power
RA
RB
3.3V Stand-by Power
2.5V Power
R1
R2
Vout=Vref*(1+R2/R1)+Iadj*R2
Vref=1.25V
91
measure current
measure current
measure current
0 ~ 3V3
ONLY C617 C142 C141ARE 50V OTHER IS 16V
CHIP CAP
measure current
high turn on
VCC1.2V_FB
VCC1.2V_OUT
VCC5V_EN
VCC2.5V_ADJ
POWER-ON/OFF-GPIO44
PANEL-ON/OFF-GPIO11
VCC5V_IN
VCC5V_OCSET
ADJPWMA
VBLCTRL-GPIO12
ADJPWMA
VCC3.3V_ADJ
BKLON
POWER-ON/OFF-GPIO44
BKLON
VCC1.2V-ST
VCC5V-ST
VCC2.5V-ST
VCC5V-ST
+5V_General
VCC3.3V-ST
VCC5V-ST
VCC5V-ST
+5V_General
VCC5V-ST
PANEL-VCC
VCC5V-ST
VCC5V-ST
VCC5V-ST
VCC5V-ST
5VAMP
VCC5V-ST
12V
5VIF
VCC5V-ST
12V
VCC5V-STDPF
C169
NC/0805
R139 1K
Q107
MMBT3904
1
32
1
1
L108
600R/1.5A 0805
C118
100nF
L103 80R 0805 6A
R129
10K
R130
100k
R142
NC
I105
AP1533/AP1534
1
2
3
4 5
6
7
8
FB
EN
OCSET
VCC OUTPUT
OUTPUT
VSS
VSS
R128
1.62K 1% 0603
D136
SR36
R120
110R 1% 0603
R188 4.7K
+ C110
1500u/16V LESR
C136
100nF
E
B
C
SOT
23
Q102
NC/3904
1
3
2
C130
100nF
+ C119
10u/16V
R123
3K 0603/2.2K
R182
100K 1% 0603
C171
100nF
R107 NC
+
C172
NC
C115
100nF
L105 40uH DIP
L122 22uF/15uF
L102 40uH DIP
R109
4.7K
L111
22uH/2.9A
I109 MP2359DJ/TSOT23-6
1
2
34
5
6
BST
GND
FBEN
IN
SW
R110
NC
R181
NC
+ C127
220u/16V LESR
I103 1084-3.3
1
23
4
ADJ
VOUTVIN
TAB
R131
4.7K
C109
100nF/0603
R124
100K 0603
R108 0R
+
C165
47u/16V
R111
0R
+ C107
220u/16V LESR
R184 4K75 1% 0603
R180
NC
+ C129
10u/16V
R126
1K 1% 0603
C166
NC
C139
100nF
R132
10K
L124 NC
R183
100K 1% 0603
E
B
C
SOT
23
Q101
NC/3904
1
3
2
C112
NC
+ C134
1u/50V
I104 1084-ADJ
1
23
4
ADJ
VOUTVIN
TAB
C128
100nF
C170
100nF
L121 NC
C163
100nF
+ C116
220u/16V LESR
C135
100nF
R105
NC
R104
NC
Q108
MMBT3904
1
32
D102
SR36
1
1
R106 100R
P101
9
8
7
6
5
4
3
2
1
+
C131
47u/16V
C133
100nF
L104 80R 0805 6A
R101 0R
E
B
C
SOT
23
Q120
MMBT3904
1
3
2
L110
600R/1.5A 0805
D133 GS1B
E
B
C
SOT
23
Q121
NC/MMBT3904
1
3
2
C103
NC
R102 0R
Q106
MMBT3904
1
32
L120 600R/1.5A 0805
+ C108
1500u/16V LESR
1
1
C161
100nF
R141
NC
L114 80R 0805 6A
1
1
L123 NC/600uH DIP
+ C167
220u/16V LESR
R136
10K
C162 100nF
R133
4.7K
C117
100nF
R103 NC
L101
DUAL BEAD 100R
C111
NC
+ C101
1500u/16V LESR
R135
10K
+ C102
NC
+
C160
470u/16V/LESR
R186 10K
R185
4K75 1% 0603
R187
10K
I107
STM4953
1
2
3
4
8
7
6
5
S2
G2
S1
G1
D2
D2
D1
D1
Q105
MMBT3904
1
32
+ C114
NC
+ C132
220u/16V LESR
R134
4.7K
C164
100nF
R189 4.7K
R117
100R 1% 0603
L109 NC
VCC1.2V-ST 4
VCC2.5V-ST 4,5
VCC3.3V-ST 4,8,10
POWER-ON/OFF-GPIO444,10
PANEL-ON/OFF-GPIO114
+5V_General 2,3,4,12
PANEL-VCC 11
VCC5V-ST 4,6,7,8,12
5VAMP 9,10
BRI_ADJ-PWM2 4
VBLCTRL-GPIO12 4
5VIF 3
12V10
VCC5V-STDPF 4
8. Schematic Diagrams
ViewSonic Corporation Confidential - Do Not Copy VTMS2431
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