Charger Control; Only For Training And Service Purposes - LG KU580 Service Manual

3. Technical Brief

3.5 Charger control

A programmable charger in AB2010 is used for battery charging. It is possible to set limits for the
output voltage at CHSENSE- and the output current from DCIO via the sense resistor to CHSENSE-.
The voltage at CHSENSE- and the current feed to CHSENSE- cannot be measured directly by the
GPADC. Instead, the two measuring amplifiers translate these inputs to a voltage proportional to the
input and within the range of the GPADC. (Fig.2-5-1) shows the schematic of charging control part.
Name
CHSENSE+
CHSENSE-
LGE Internal Use Only
VBAT
C613
24p
Battery Conn.
2012
R614
Close to Pin 3
Phone ground 1%
0.025
1/4W
CN600 return path
VBAT
C626
NA
BATT_GND
2012
R621
1%
0.1
1/4W
DCIN_A
6
G1
Q600
3
G2
R623
4 2 5 1
47K
DCIN
Fig. 3-5-1. Battery charging circuit
Fig. 3-5-2. Battery charging block diagram
Type
Analog
Analog
Table 3-5-1. Charger Control channel spec
K12
K11
R611
C614 RTCCLK
24p 0
TP601
G10
SRST_n
SCLK
SDAT
R613
G12
0
C622
route as a differential pair 47p
Close to AB
R617
G11
0
R618 0
R619
0
route as a differential pair
R622
0
Unused Description
VBAT Current sensing input positive
VBAT Current sensing input negative
Copyright © 2007 LG Electronics. Inc. All right reserved.
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XTAL1
XTAL2
J12
32KHZ
SIMOFF_N
K2
SRST_N
J3
SCLK
K3
SDAT
H4
BDATA
FGSENSE+
FGSENSE-
H1
VBAT_D
E1
CHSENSE+
F2
CHSENSE-
E2
CHREG
F3
DCIO

Only for training and service purposes