LG KU950 Service Manual page 55

3. TECHNICAL BRIEF
3.10.5.3 LCD backlight / Flash LED / Camera LDO
U802(MAX8631XETI) is a charge pump and supply a power of mega camera, VGA camera and
camera flash LED. U802 is controlled by GPIOs of MSM6275.
LCD_BL_CTRL
FLASH_LED_CTRL
CAM_DUAL_LDO_EN
+VPWR
U802 MAX8631XETI
1 23
PIN C1P
2
IN
C810
22
10u C1N
3 26
GND C2P
24
PGND
29
BGND
27
C2N
25
OUT
20
ENM1
19
ENM2
21 16
ENF M1
18 15
ENLDO M2
28 14
P1 M3
17 13
P2 M4
12
F1
11
F2
8 10
SETM F3
9
F4
7
SETF
4
LDO1
6 5
REFBP LDO2
C819
EUSY0263101
0.01u
LCD BL/FLASH LED/CAMERA LDOs
Figure. Schematic of charge pump
- 56 -
C809
1u
R811
C811
R812
1u C812
10u
MAIN_LED0
MAIN_LED1
MAIN_LED2
MAIN_LED3
FLED
VCAM_2.8V
C820 C905
1u 1u
0
WLED_PWR
FLASH_BL_CPO
0
Remove Two R 2005.11.24
Remove MLED4 2005.11.24
VCAM_1.8V