LG 42LV4400 Service Manual page 110

5
1.25 x (1+180/110) = 3.3V
+5VSB U4 AP1117EL-13 U4 AP1117EL-13
3
IN IN
DEL L22
+ CE11 + CE11
D
100uF/16V 100uF/16V C116 C116
0.1uF/16V 0.1uF/16V
08/23 Add EC Cap.
+5VSB
CORE POWER DV10
DEL L26
C44 C44 C47 C47
10uF/10V 10uF/10V 0.1uF/16V 0.1uF/16V
C
0805C 0805C
High = > DV10 POWER ON
Low = > DV10 POWER OFF
R318 R318 1K 1K
8 OPWRSB
R319 R319
NC/20K NC/20K
B
+5VSB L25 L25
0 0805R 0 0805R
CORE POWER DV33
R56 R56
10 10
C45 C45 C48 C48
10uF/10V 10uF/10V 0.1uF/16V 0.1uF/16V
0805C 0805C C83 C83 C85 C85
0.1uF/16V 0.1uF/16V
0.1uF/16V 0.1uF/16V
A
5
4
L79 L79 0805L 0805L
4
ADJ/FIX ADJ/FIX
80ohm/6A 80ohm/6A
2
OUT OUT
R30 R30 + CE10 + CE10
110_F 110_F 100uF/16V 100uF/16V C377 C377
SOT223 SOT223
NC/4.7uF/10V/0805 NC/4.7uF/10V/0805
ADJ ADJ
R32 R32
180_F 180_F
1.25 x (1+180/110) = 3.3V
C118 C118
R55 R55 R64 R64
NC NC
10 10 U6 U6 20K 20K
AT1526P11U AT1526P11U
L42 L42
1 8
VCC VIN
2 7
REF LX
3 6
GND PGND
4 5
FB EN
C80 C80 C82 C82
0.1uF/16V 0.1uF/16V
0.1uF/16V 0.1uF/16V C81 C81 EN10
1uF/25V 1uF/25V
0603C 0603C
0.8 x (1+1.21K/3.01K) = 1.122V
EN10
R65 R65
U9 U9 20K 20K
AT1526P11U AT1526P11U
L43 L43 4.7uH_3.8A 4.7uH_3.8A
1 8
VCC VIN
2 7
REF LX
3 6
GND PGND
4 5
FB EN
C74 C74
C84 C84 3V3_EN
0.1uF/16V 0.1uF/16V
1uF/25V 0603C 1uF/25V 0603C
0.8 x (1+3.16K/1K) = 3.328V
4
3
+3V3SB
+3V3SB
R167 R167
35mA
1K 1K
0805C 0805C C101 C101
0.1uF/16V 0.1uF/16V
DV33 R169 R169
2
10K 10K
High = > AV33 ON
R168 R168
Low = > AV33 OFF
10K 10K
MAX 1.1A
RMS 930mA
4.7uH_3.8A 4.7uH_3.8A DEL L48
R36 R36
C73 C73 1K21_F 1K21_F + CE15 + CE15
470uF/16V 470uF/16V
0.1uF/16V 0.1uF/16V
08/23 Modify EC Cap.
R37 R37
Low ESR
3K01_F 3K01_F
<125 mOHM
+5VSB
R326 R326
10K 10K
VCCK
R323 R323 1K 1K Q46 Q46
2
KN3904S KN3904S
R325 R325
10K 10K
MAX 840mA
03/29 DEL C553,FB16,AV33
RMS 525mA
DV33
R42 R42
3K16_F 3K16_F + CE16 + CE16 C77 C77
470uF/16V 470uF/16V 1.0uF/25V 1.0uF/25V
0603C 0603C
08/23 Modify EC Cap.
R43 R43
Low ESR
1K_F 1K_F
<125 mOHM
3
2
2 3
ZD23 ZD23 Q29 Q29
BZT52C15S-7-F BZT52C15S-7-F AP2309GN AP2309GN
C79 C79 SOT23_GSD SOT23_GSD
D24 D24 0.1uF/25V 0.1uF/25V R360 R360
LL4148WP LL4148WP NC/1K NC/1K
1206R 1206R
R166 R166 10K 10K
Q15 Q15
KN3904S KN3904S
VCCK
1.09A
C76 C76
1.0uF/25V 1.0uF/25V
0603C 0603C
EN: H level at least 2V
3V3_EN
1K 1K R324 R324 Q47 Q47
2
KN3904S KN3904S
1,3,4,5,6,7,8,9,10,11,12,13,14,15,16
APPROVED BY: APPROVED BY: APPROVED BY:
MODEL MODEL MODEL
CHECKED BY: CHECKED BY: CHECKED BY:
CIRCUITY CIRCUITY CIRCUITY
PCB P/ N: PCB P/ N: PCB P/ N:
DESIGN BY: DESIGN BY: DESIGN BY:
ECN NO: ECN NO: ECN NO:
SCH FILE : SCH FILE : SCH FILE :
PCB FILE : PCB FILE : PCB FILE :
2
1
MAX 256mA
AV_3V3
FB17 FB17
60ohm/3A 60ohm/3A
0603L 0603L
C71 C71 C565 C565 C566 C566
0.1uF/25V 0.1uF/25V 10uF/10V 10uF/10V 10uF/10V 10uF/10V
D
C
B
GND
GND
TECHNOLOGY TECHNOLOGY TECHNOLOGY
42LV4400(364213320150) 42LV4400(364213320150) 42LV4400(364213320150)
A
47LV4400(364705220150) 47LV4400(364705220150) 47LV4400(364705220150)
DIGITAL POWER DIGITAL POWER DIGITAL POWER
017122714132 017122714132 017122714132 Sheet Sheet Sheet 2 2 2 of of of 17 17 17
2.0 2.0 2.0
REV: REV: REV:
PCN0000627 / PCN0000637 PCN0000627 / PCN0000637 PCN0000627 / PCN0000637
364213320150_PCN0000627.DSN 364213320150_PCN0000627.DSN 364213320150_PCN0000627.DSN PCB REV: PCB REV: PCB REV: 2.0 2.0 2.0
017122714132.BRD 017122714132.BRD 017122714132.BRD DATE: DATE: DATE:
Monday, August 29, 2011 Monday, August 29, 2011 Monday, August 29, 2011
1