LTC4410ES6 LINER [Linear Technology], LTC4410ES6 Datasheet - Page 7

• Manufacturer Part Number: LTC4410ES6
• Description: USB Power Manager in ThinSOT
• Manufacturer: LINER [Linear Technology]

APPLICATIO S I FOR ATIO
Dual Battery Charging with Priority
The LTC4410 can be used to manage two battery chargers,
giving one of the chargers (see Figure 2) priority. When
BAT1 is being charged, the charge current is flowing
through the LTC4410. The LTC4410 is sensing the current
and sourcing a current equal to BAT1 charge current/1000
out of CHP. This effectively reduces the BAT2 charger
ADAPTER
5V WALL
U
0.15µF
U
4.7µF
OFF ON
C2
C1
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
1Ω
R1
+
+
Figure 2. Priority Dual Battery Charging with Wall Adapter
W
MODE
V
SHDN
V
TIMER
IN
IN
GND
LTC4410
LTC4053
PROG
CHP
U
R2
2k
USBP
V
GND
NTC
BAT
OUT
+
current. As BAT1 current demands reduce, the current
sourced out of CHP is reduced, enabling BAT2 to have
more current. In this example the power supply is a 750mA
minimum wall adapter, R
ers are 2kΩ, resulting in a 750mA charge current. In this
application, the total current out of the wall adapter will
never exceed 750mA.
OFF ON
C3
4.7µF
+
BAT2
4410 F02
C4
0.1µF
SHDN
V
TIMER
IN
LTC4053
PROG
R3
2k
PROG
GND
NTC
BAT
(R2 and R3) for the charg-
BAT1
LTC4410
sn4410 4410fs
7