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3. TECHNICAL BRIEF
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.13 Battery Charging
The MP26021 is a linear, high-performance single cell Li-Ion battery charger.
By integrating high voltage input protection into the charger IC, the MP26021 can Tolerate an input
surge up to 28V
The device features constant current (CC) and constant voltage (CV) charging modes with
programmable charge currents(85mA to 1A), programmable battery full threshold, thermal protection,
battery temperature monitoring, reverse current blocking and trickle charge. The device also provides
AC adapter power good and Charge status indications to the system.
MP26021 is available in a 10-pin 3mm x 3mm QFN package.
Figure 3.15 CIRCUIT FOR BATTERY CHARGING
(10V,Z,Y5V)
* FL401 : NA
(50V,J,NP0)
(2012)
5
IN_PAD
12
8
NC1
NC2
9
OUT1
6
7
OUT2
_EN
10
3
_FLAG
EUSY0354101
NCP347MTAHTBG
U405
GND
2
11
GND_PAD
1
IN1
4
IN2
IN3
VCHARGE
C431
ECCH0003002
10u
VCHARGE_IO
OUT
ICVFP10181E301FR
FL401
GND1
GND2
IN
R434
0
56p
C432
R435
0
(10V,K,X5R, 1005)
(1%)
(10V,K,X5R, 1608)
CHARGING IC
(1%)
(5%)
R321
20K
620
R333
0.1u
2V8_VEXT
C356
ECCH0007802
4.7u
C342
DNI
R314
0
R328
10
BATT
GND
6
IBF
8
1
IN
9
ISET
5
NTC
11
PGND
SS
7
3
_ACOK
_CHG
2
4
_EN
U304
MP26021
EUSY0352601
R320
100K
R315
100K
R326
470K
VBAT
3.9K
R317
C331
ECZH0001215
1u
TP304
100K
R329
4.7n
C357
nCHG_DET
nCHG_EN
VCHARGE
Summary of Contents for KP110
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