LTC4078X
TYPICAL APPLICATION
Full Featured Li-Ion Charger
800mA (WALL)
475mA (USB)
LTC4078X
WALL
ADAPTER
BAT
DCIN
USB
POWER
1k
1k
USBIN
1µF
1µF
PWR
CHRG
BATDET
4.2V Li-Ion
BATTERY
PACK
IUSB
IDC
+
3.9k
ITERM
GND
2.1k
1%
1.24k
1%
1k
1%
4078X TA02
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PART NUMBER
DESCRIPTION
COMMENTS
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950mꢁ Charger Current, Thermal Regulation, C/X Charge Termination,
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and High Efficiency Li-Ion Battery Charger
Li-Ion Batteries Directly from USB Port, Thermal Regulation, 200mΩ Ideal Diode
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ꢁutomatic Switching Between DC Sources, Load Sharing, Replaces ORing Diodes
ThinSOT and PowerPath are trademarks of Linear Technology Corporation.
4078xf
LT 0907 • PRINTED IN USA
LinearTechnology Corporation
1ꢀ30 McCarthy Blvd., Milpitas, Cꢁ 95035-7417
16
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© LINEAR TECHNOLOGY CORPORATION 2007
(408) 432-1900 FꢁX: (408) 434-0507 www.linear.com