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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. TECHNICAL BRIEF
LGE Internal Use Only
3.2.4 Battery Charger Interface
Figure 3-2-7 BATTERY CHARGER \CIRCUIT DIAGRAM
ISL9221 accepts two power inputs, normally one from a USB (Universal Serial Bus) port and the other from
TA(Travel Adaptor).
The ISL9221 features 28V and 7V maximum voltages for the TA and the USB inputs respectively. Due to the
28V rating for the TA input, low-cost, large output tolerance adapters can be used safely. An over voltage p
rotection functions are integrated in ISL9221 for USB & Charge
)
%
1
(
13Kohm - Charging current : 524mA (080924_kwp)
)
%
1
(
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R118
20K
p
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R116
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7
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