Only For Training And Service Purposes - LG GM200 Service Manual

3.2.4 Battery Charger Interface
C H G _
C H G
ISL9221 accepts two power inputs, normally one from a USB (Universal Serial Bus) port and the other from
TA(Travel Adaptor).
The ISL9221 features 28V and 7V maximum voltages for the TA and the USB inputs respectively. Due to the
28V rating for the TA input, low-cost, large output tolerance adapters can be used safely. An over voltage p
rotection functions are integrated in ISL9221 for USB & Charge
LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

2 V 9 3 _ V E X T
V C H G
V U S B N I
R 1 0 7 R 1 0 8
D I N D I N
R 1 1 0 D I N
P P R
R 1 1 3 D I N
E O C
_ E N
R 1 1 7
C 1 3 7 C 1 3 8
1 u 1 u
1 0 0 K
1 ( 6 0 ) 8
1 ( %
B t a
C N 1 0 2
1
R 1 2 1 1 K
2
B A T T _
3
C 1 4 8
0 0 . 1 u
E N Z Y 0 0 1 5 7 0 1
H S B C 3 - P 6 - 5
Figure 3-2-7 BATTERY CHARGER \CIRCUIT DIAGRAM
O V P C H A R G N I G C I
U 1 0 2 S I L 9 2 2 1
1 3
P G N D
1
V D C
1 2
V D C _ B Y P
2
V U S B
1 1
B A T
3
_ P P R
1 0
U S B _ B Y P
4
_ C H G
9
V I D C
5
_ E N
8
G N D
6
I M N I
7
U I S B
E U S Y 0 3 5 1 6 0 1
C 1 3 9
5 1 . K o h m I : m n i = 1 0 8 m A
1 u
1 ( % )
) 1 ( % )
e t y r C o n n e t c r o
V B A T
T E M P
C 1 4 3 C 1 4 4 C 1 4 5 C 1 4 6 C 1 4 7
1 0 0 p 0 0 . 1 u 1 0 p 6 p 3 p
C 1 4 2
3 3 u
- 31 -
3. TECHNICAL BRIEF
R 1 1 4
1 0 K
U S B _ D E T
R 1 1 9
C 1 4 0 C 1 4 1
1 5 K
1 u 1 u
C H G _ A B B
R 1 2 0
3 0 K
C H G _ D E T
R 1 2 3
3 0 K
LGE Internal Use Only