System Power, Led Bklt - Clevo M720T Service Manual

Schematic Diagrams

System Power, LED BKLT

5VS,3.3VS
Sheet 27 of 40
M735T LED PANEL BACKLIGHT DRIVER
System Power,
LED BKLT
B - 28 System Power, LED BKLT
V D D 5
P R 9 8
1 00 K _ 04
S U S B
P Q2 4
G 2 N 7 00 2 W
[ 1 7 , 2 0, 2 3 , 26 , 2 9 ] S U S B #
P R 14 7
S U S B G
* 10 0 K _0 4
V I N
P C 20 1
* 10 U _ 2 5V _ 1 2
[ 12 , 2 6 ] B R I G H T N E S S
V D D 5
P R 1 86
*1 00 K _ 04 P Q5 9
*2 N 7 0 02 W
G
F s w = 2 MH z
G P R 1 88
[ 12 ] I N V _B LO N
P Q6 0
*2 N 7 00 2 W P C 2 06 *1 . 05 K _ 1 %_ 0 4
* 0 . 1U _1 6 V _0 4
P C 2 07 P R 19 1
*0 . 1U _1 6 V _ 04 * 13 K _ 1% _ 04
S GN D S G N D
Fsw = 2 6.0 3/R. FSE T
1.2 3/I. SET * 2 10
(mA /LED )
P R 1 93 *0 _ 06
S GN D
P Q 27
S Y S 1 5 V V D D 5 A O 44 6 8 5 V S
3A 8 3A
7 3
6 2
P R 9 7 5 1
P C 1 0 1 P C 1 0 4 P R 9 5
1 M_ 04
0 . 1U _1 6 V _ 04 *1 0 U _ 10 V _ 08 10 0 K _0 4
S U S B
P Q3 2 P C 1 0 3
2 N 7 00 2 W
*1 0 0P _ 5 0V _ 0 4
P D 2 3 *F M2 6 0
P L1 0 *4 . 7u H A C
V D D 5
OV P=3 5V
P C 20 2
P R 1 8 5
* 10 U _ 2 5 V _1 2
P C 20 5 *9 0 . 9K _ 1 % _0 4
* 1U _1 0 V _ 06
R .OVP = (V.O VP- 30)/ 54. 9uA
P U 9
19
E N
2 6
A GN D
1 0 0 - 4 0 0H z 20
P W M
2 7
E P
2 0 K -2 MH z 6
A P W M
1
P GN D
2
S K I P
2 1
P GN D
3 S GN D
C O MP
1 8 S E L 3 = H P R 1 8 7
S E L3
4
F S E T
1 7 S E L 2 = L P R 1 8 9
S E L2
L E D = 20 m A 5 1 6 S E L 1 = H P R 1 9 0
I S E T S E L1
P R 1 9 2 7 1 5 L E D 2-
L E D 1 L E D 2
*1 2 K _0 4
*A 8 5 00
S G N D
I D = L E D 4-
L E D 6-
L E D 5-
L E D 3-
L E D 1-
P Q2 9
S Y S 15 V V D D 3 3 . 3V S
A O4 4 68
8
6A 6A
7 3
6 2
P R 1 54 5 1
P C 9 8 P C 1 05 P R 9 1
1 M_ 0 4
0 . 1 U _ 1 6V _ 0 4 *1 0U _1 0 V _ 08 10 0 K _ 04
P Q 2 5 P C 10 0
G 2 N 7 0 0 2W
1 0 0P _ 5 0 V _0 4
P R 20 0
*1 0 _ 06
P Q 64
* 2N 7 00 2 W
G
S EL1 SEL2 SEL3 L EDx Out put
Only LE D1 o n
0 0 0
1 0 0 LED1 th rogh LE D2 o n
L E D _ P W R +
0 1 0 LED1 th rogh LE D3 o n
P C 2 0 3 P C 2 0 4
1 1 0 LED1 th rogh LE D4 o n
*1 U _ 5 0 V _1 2 *1 U _ 5 0V _ 1 2
0 0 0 LED1 th rogh LE D5 o n
1 0 1 LED1 th rogh LE D6 o n
0 1 1 LED1 th rogh LE D7 o n
1 1 1 LED1 th rogh LE D8 o n
V D D 5
J _ LE D 1 _7 3
30m il
*1 0K _ 0 4
L E D _ P W R + 1
2
*0 _0 4 L E D 1 -
3
L E D 3 -
4
*1 0K L E D 5 -
5
L E D 6 -
6
L E D 4 -
7
L E D 2 -
8
9
[ 5, 1 2 ] L V D S -L 0 N
1 0
[ 5, 1 2 ] L V D S -L 0 P 1 1
2A
1 2
P L V D D
1 3
1 4
3 . 3 V S 1 5
1 6
[ 5, 1 2 ] L V D S -L 2 N 1 7
[ 5, 1 2 ] L V D S -L 2 P
1 8
1 9
[ 5 , 1 2] P _ D D C _C LK 2 0
[ 5 , 12 ] P _ D D C _ D A T A
2 1
2 2
2 3
2 4
[ 5, 1 2 ] L V D S -L 1 N 2 5
[ 5, 1 2 ] L V D S -L 1 P
2 6
2 7
[ 5 , 1 2] L V D S -L C L K N 2 8
[ 5 , 1 2] L V D S -L C L K P
2 9
3 0
* 20 3 7 4-0 3 0E -3 1
[ 12 , 2 8. . 3 2 ] V I N
[ 1 2] P L V D D
[ 1 2, 2 8 , 29 ] S Y S 1 5V
[ 28 , 2 9] V D D 5
[ 1 3, 2 1 , 26 , 2 8 . . 30 , 3 2] V D D 3
[ 12 , 1 3, 1 6 , 1 9, 2 1 , 24 , 2 5] 5 V S
[ 5 , 8 . . 16 , 1 8 . . 26 , 3 1] 3 . 3V S