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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.
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure. Schematic of charge pump
LCD_Backlight driver
ZD101
RSB6.8CST2R
1u
C102
C101
1u
1u
C100
100K
R101
D3
D4
1
EN_SET
2
9
GND
13
PGND
8
VIN
VOUT
5
AP_+VPWR
AAT3151IWP_T1
3
C1+
C1-
4
C2+
6
7
C2-
10
D1
11
D2
12
U100
4.7u
C103
WLED_CTL
LED_ANODE
LED4
LED3
LED2
LED1
Figure. Schematic of camera LDO
AP_+VPWR
AP_VDD_CAM_2.7V
AP_VDD_CAM_1.8V
1u
C305
2.2u
C309
AP_+VPWR
U301
BH18LB1WHFV
BGND
6
GND
2
5
NC
1
STBY
VIN
3
4
VOUT
4
BYP
EN
3
GND
2
1
IN
5
OUT
U303
MIC5219-2.7YM5
C308
1u
2.2u
C307
C306
470p
CAM_PWR_EN
CAM_PWR_EN
Содержание KS10
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