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LTC4061 Datasheet(PDF) 18 Page - Linear Technology

Part # LTC4061
Description  Standalone Linear Li-lon Battery Charger with Thermistor Input
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4061 Datasheet(HTML) 18 Page - Linear Technology

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LTC4061
18
4061fc
APPLICATIO S I FOR ATIO
Figure 8. Combining Wall Adapter and USB Power
+
VCC
D1
PROG
IDET
3.3k
2k
MN1
5V WALL
ADAPTER
ICHG = 800mA
USB POWER
ICHG = 500mA
MP1
4061 F08
BAT
LTC4061
1.25k
Li-Ion
BATTERY
SYSTEM
LOAD
1k
C/5
MOSFET, MP1, is used to prevent back conducting into the
USB port when a wall adapter is present and a Schottky
diode, D1, is used to prevent USB power loss through the
1k
Ω pull-down resistor.
Typically a wall adapter can supply more current than
the 500mA limited USB port. Therefore, an N-channel
MOSFET, MN1, and an extra 3.3k
Ω program resistor are
used to increase the charge current to 800mA when the
wall adapter is present.



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