Only For Training And Service Purposes - LG KG290 Service Manual

CHARGE(TA+USB)
_CHG_EN
4.2V~3.86V
Copyright © 2007 LG Electronics. Inc. All right reserved.

Only for training and service purposes

USB_VBUS VCHARGE
C137 C138
1u 1u
3.85V~3.75V
Figure 3-6. CIRCUIT FOR BATTERY CHARGING
- 27 -
3. TECHNICAL BRIEF
VBAT
U102 ISL6299
1 10
CRDL BAT
2
USB
6 3
IMIN _PPR
4
_CHG
9
ICDL
7 8
USBON GND
5 11
_EN PGND
R117
100K
3.74V~3.70V
2V8_VEXT
_CHG_STAT
C139
1u
3.69V~3.57V
LGE Internal Use Only