LG KE820 Service Manual page 36

R202
RTC_OUT PWRON
220K
R208
470K
VBAT
1V8_MEM 3V1_USB 1V5_RF
FB201
VCHS
PWRON
USB_PU
VBUS_USB
C219 C220 C221 C222
22u 22u 2.2u 2.2u
2V72_IO 2V85_CARD 2V85_IO2 2V85_SIM
C226 C227 C228 C229
2.2u 2.2u 2.2u 2.2u
Figure 6 SM-Power circuit diagram with charging part
VCHG
R203
VBACKUP
22K
SPOWER_INT
VCH_CTL
_PMRST
VBAT
1
VCHS
2
VBATS
3
VRFC
4
ON
5
U203
VDDPW
L201
6
SW
10uH
7
PMB6812
VSSPW
8
VSSFB
9
FB
10
VUPU
11
VUSB
12
VBUS
C223
2.2u
VBAT
C230
1u
- 37 -
3. TECHNICAL BRIEF
2V11_RTC 1V5_CORE 1V5_DSP 2V85_RF VBAT 2V7_VCXO
C207 C208 C209 C210 C211
2.2u 2.2u 2.2u 2.2u 2.2u
2V65_ANA
36
VCXOEN VCXO_EN
35
VDDA
34
VANA
33
VSSR
32 R213 82K
IREF
31 C216 0.1u
BYP
30
VDDAU
29
AUOP
28
AUON
27
VSSAU
26
AUIP
25 VCHG
AUIN
Q201
SI3457BDV C224
S
G
VCH_CTL
4.7u
D1 D2 D3 D4
D201
CRS08
VCHS
R220
0.15
2V65_BT
C212 C213
2.2u 2.2u
VBAT
C217 C218
2.2u 2.2u
R217
100K
VBAT
C235
100u