LG -A290 Service Manual page 47

EXPDET
GND
GND
USB1DM
USB2DM
AUDL
USB1DP
USB2DP
AUDR
MIC
SDA
SCL
INTB
DSS
500k
VIN
OUT1
OUT2
OUT3
OUT4
LGE Internal Use Only
USB LDO
Current Current
Sense Control
ISET
VICHG
Charging Full
CONTROL
LDO1
LDO2
LDO3
LDO4
Figure 3.11.2 MINI ABB BLOCK DIAGRAM
2C Charge Full
current control
IFULL
Control
VDD_SYS=
(VBUS or VBAT)
75µA
Charger
detection
0.6V
200k
ADC
LDO
I control
I control
I control
I control
- 47 - Copyright © 01 LG Electronics. Inc. All right reserved.
3. TECHNICAL BRIEF
VBUS
VBAT
Supply
Select
3.5V
D-
D+
ID
680
R2.2K
CLDO
LED1
LED2
LED3
LED4
Only for training and service purposes