LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.8 Battery Charging Block Interface
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.
3. TECHNICAL BRIEF
- 30 -
Figure 3-8. Charging IC Interface
(1%)
(85mA)
(25V,K,Y5V)
(2012)
(1%)
(400mA)
(1608)
CHARGING IC
C129
2.2u
620
R123
47
R121
R119
470K
VCHARGE
3.9K
R128
4.7u
C128
VBAT
U102
MP26021
10
BATT
6
GND
IBF
8
1
IN
9
ISET
5
NTC
PGND
11
SS
7
3
_ACOK
_CHG
2
_EN
4
1.8K
R120
R125
100K
20K
R127
R126
100K
0.1u
C130
CHG_EN
CHARGE_DETECT
Содержание KP105
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