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4. Circuit Description
4.2.9 BATTERY CHARGING
Battery management, which controls charge and discharge of the battery is the most important
function for safety. 7332 SW performs charging algorithm. To regulator the power PMOS for set the
charging current.
KG195 CHARGING CIRCUIT AND ALGORITHM
charging Circuit and Algorithm
7332 Charging circuit:
The schematic below shows the external charging components used in the Arima 7332 project. All
ports are directly connected to the corresponding pins of PMU IC (6305). VCHG is the V charger
supply rail coming directly from the wall-plug constant voltage charger via the system connector, and
VBAT is the Battery Voltage rail, connected directly to the battery pack terminal connector. The system
uses a solid ground plane, and both the Battery Pack terminal and the wall-plug charger return paths
are connected directly to ground.
VCHG
C501
1uF_10%_16V
0603C-S
R501
100K_5%
0402R-S
P.4
ADC3_VCHG
R504
24K_1%
0402R-S
V_CELL
VBAT
C507
100nF_10%
TP501
TP507
TP506
0402C-S
TP1.5
TP1.5
TP1.5
3
VBAT
R508
24K_1%
2
BATDET
AVDD
TP504
0402R-S
TP1.5
1
GND
ADC2_TBAT
4
PGND
TP505
5
PGND
TP1.5
C516
100nF_10%
J502
0402C-S
250072MB003G501ZL
BAT-BAR13-037102
LGE Internal Use Only
P.6
PWRKEY
P.4
KCOL6
F501
CF06V3T1R25
P.4
BBWAKEUP
0603R-S
P.2,4
VCXOEN
VCHRIN
U501
Si5853DC-T1-E3
SI5853DC
R506
0.33 (1% 1/4W)
0805R-S
1
8
ADC0_I-
P.4
2
7
3
6
V501
4
5
ADC1_I+
P.4
ESDA
R510
0402R-S
P.4
100K _1%
YC124
TP502
TP503
VDD
TP1.5
TP0.5
D501
RB520S-30
RB520S30T1
Pull Down
P.4
KP_BL_PWM1
P.4
GPIO7_STATUS_EN
P.4
GPIO10_VIB_EN
P.4
GPIO31_CHR_CTL
P.4
EINT2_CHARGER
VSIM
P.4
P.4
P.4
P.4
P.4
GPIO32_SIMSEL
J501
1
2
CLK
I/O
3
4
RST
VPP
5
6
VCC
GND
SCR49
V502
SIM-SCR49-6K700C-2.54
ESDA
0402R-S
C515
V503
100nF_10%_16V
ESDA
0603C-S
0402R-S
Copyright © 2007 LG Electronics. Inc. All right reserved.
- 36 -
R502
U502
100K_5%
MT6305B
0402R-S
MT6305
32
PWRKEY
33
PWRBB
31
SRCLKEN
45
VmSEL
44
VaSEL
43
BATDET
42
BATUSE
36
LEDEN
35
ALERTEREN
34
VIBRATOREN
1
CHRIN
2
GATEDRV
R505
DNI
3
NC/DANODE
0402R-S
4
ISENSE/NC
5
CHRCNTL
6
CHRDET
9
SIMDATA
SIMIO
10
SIMRST
SIMRST
11
SIMCLK
SIMCLK
12
SIMVCC
SIMVCC
13
SIMSEL
SIM_I/O
14
SIO
SIM_RST
15
SRST
SIM_CLK
16
SCLK
SIM Connector
2 4 6
V504
Top View
ESDA
0402R-S
1 3 5
Only for training and service purposes
ALERTER
VIBRATOR
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