3.14 Battery Charging
The ISL6299 accepts two power inputs, normally one from a USB port and the other from a TA.
Charging Process
- Connecting TA & Charger Detection
- Control the charging Current by U203(Charger IC)
- Charging Current flows into the Battery.
Pins of U203 used for charging
- CRDL: Charger supply.
- USB: USB charging supply.
- IMIN: IMIN is the programmable input for the end-of-charge current.
- ICDL: Program the cradle charge current during the constantcurrent mode.
- _EN: Enable logic input
- BAT: Charger output pin.
TA (Travel Adaptor)
- Input voltage: AC 100V ~ 250V, 63Hz
- Output voltage: DC 5.1V
- Output current: Max 700mA
Battery
- Li-ion battery (Max 4.2V, Nom 3.7V)
- Standard battery: Capacity - 800mAh
- 42 -
3. TECHNICAL BRIEF
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3.14 CIRCUIT FOR BATTERY CHARGING
External Charger
[Rev.C] Change External Charging IC (ISL6294 -> ISL6299)
100K
R253
USB_VBUS
10K
R250
33K
R254
VCHARGE
C228
1u
C227
1u
R252
100K
10K
R255
C442
VBAT
47p
BAT
10
CRDL
1
8
GND
ICDL
9
6
IMIN
PGND
11
2
USB
USBON
7
4
_CHG
_EN
5
_PPR
3
ISL6299
U203
1u
C226
_CHG_EN
USB_DET
Charging current flow
Содержание KP210
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