Only For Training And Service Purposes - LG KS10 Service Manual

3. TECHNICAL BRIEF
3.14.3. LCD backlight / Camera LDO
U100(in SUB board, AAT3151) is a charge pump. U301(in main board, BH18LB1WHFB) supply a
1.8V power of mega camera and VGA camera. U303(in main board, MIC5219-2.7YM5) supply a 2.7V
power of mega camera and VGA camera.
These parts are controlled by GPIOs of STN8810.
AP_+VPWR
LED_ANODE
C102
1u
AP_+VPWR
CAM_PWR_EN
C308
1u
LGE Internal Use Only
WLED_CTL
C103
4.7u
Figure. Schematic of charge pump
AP_VDD_CAM_1.8V
U301 BH18LB1WHFV
1 5
STBY NC
2 6
GND BGND
3 4
VIN VOUT
C309
2.2u
Figure. Schematic of camera LDO
U100 AAT3151IWP_T1
8 3
VIN C1+
5 4
VOUT C1-
6
C2+
2
EN_SET
7
C2-
10
D1
11
D2
9 12
GND D3
13 1
PGND D4
LCD_Backlight driver
AP_+VPWR
CAM_PWR_EN
Copyright © 2007 LG Electronics. Inc. All right reserved.
- 72 -
C100
1u
C101
1u
LED1
LED2
LED3
LED4
AP_VDD_CAM_2.7V
U303
MIC5219-2.7YM5
1 5
IN OUT
2
GND
3 4
EN BYP
C305 C306
1u 470p

Only for training and service purposes

C307
2.2u