LG LG-E960 - Charger Troubleshooting

4. TROUBLE SHOOTING
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Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4.23 Charger Troubleshooting
a. Current ow
- LGE960 Charging scenario is stated from bottom side micro USB connector of LGE960. The charging current ows step
by step, USB connector on FPCB to over voltage protection IC (protect up to 28V, PM8921 internal support) to charging
IC(PM8921 internal charger).
b. Charging current setting
- The charging current is set to max 900mA. The constant current period is set until voltage up to 4.3V. The constant
voltage period is ended up to cut-o current of 100mA.
FL10001
INNOCHIPS
EAM62451101
ICMEF112P350MFR
5
6
31
42
P2
P4
P1 P3
P6
P5
C10003
1u
ZD10007
ENBY0040301
GB042-34S-H10-E3000
CN10001
LS-MTRON
1817
1916
2015
2114
2213
2312
2411
2510
269
278
287
296
305
314
323
332
341
C10004
33p
ZD10003
ZD10008
VBUS_USB_IN
0R10008
L10001 82n
L10003 82n
47K
R10002
ZD10002ZD10001
D10012
MOTOR_VDN
VADAPTER
MOTOR_VDP
USB_DP
USB_DN
KEY_G_LED_DRV_N
Rev.E
Rev.E
Rev.B
Using PM Internal OVP 28V(USB_IN)
2mm
QCT's Recommend
C23019 100n
4.7uC23021
C23020
100n
J18 P18 N18 N17 P17 D17 D18 M18 M17 D1 G17 F18 F17 E18 E17
USB_IN1 USB_IN2
USB_OUT1 USB_OUT2
PHY_VBU
S
USB_ID
DC_IN1 DC_IN2
OVP_SN
S
OVP_CT
L
VDRV_N
VDRV_P
VSW_CHG_01 VSW_CHG_02
VREG_CHG
USB_PHY_VBUS
VBUS_USB_IN
L23001 1u
C23012
DNI
+VPWR
C23016 1u
C23013 10u
Rev.D
Rev.D
1.5mm
Rev.B
Battery
System