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LTC4061EDD-4.4 Datasheet(PDF) 1 Page - Linear Technology

Part # LTC4061EDD-4.4
Description  Standalone Linear Li-Ion Battery Charger with Thermistor Input
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4061EDD-4.4 Datasheet(HTML) 1 Page - Linear Technology

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LTC4061

4061fd
Typical applicaTion
FeaTures
DescripTion
Standalone Linear Li-Ion
Battery Charger with
Thermistor Input
The LTC®4061 is a full-featured, flexible, standalone linear
charger for single-cell Lithium-Ion batteries. It is capable
of operating within USB power specifications.
Both programmable time and programmable current
based termination schemes are available. Furthermore,
the CHRG open-drain status pin can be programmed to
indicate the battery charge state according to the needs
of the application. Additional safety features designed
to maximize battery lifetime and reliability include NTC
battery temperature sensing and the SmartStart charg-
ing algorithm.
No external sense resistor or external blocking diode is
required for charging due to the internal MOSFET archi-
tecture. Internal thermal feedback regulates the charge
current to maintain a constant die temperature during
high power operation or high ambient temperature condi-
tions. The charge current is programmed with an external
resistor. With power applied, the LTC4061 can be put into
shutdown mode to reduce the supply current to 20µA and
the battery drain current to less than 5µA.
Other features include smart recharge, USB C/5 cur-
rent programming input, undervoltage lockout and AC
Present logic output.
applicaTions
n
ChargeCurrentProgrammableUpto1A
n
ChargesSingle-CellLi-IonBatteriesDirectlyfrom
USBPort
n
PresetChargeVoltagewith±0.35%Accuracy
n
ThermistorInputforTemperatureQualified
Charging
n
InputSupplyPresentLogicOutput
n
ThermalRegulationMaximizesChargeRate
WithoutRiskofOverheating
n
ProgrammableChargeCurrentDetection/
Termination
n
ProgrammableChargeTerminationTimer
n
Smart Pulsing Error Feature
n
SmartStart™ Prolongs Battery Life
n
20µA Charger Quiescent Current in Shutdown
n
Available in a Low Profile (0.75mm) 10-Lead
(3mm
× 3mm) DFN Package
n
Handheld Computers
n
Portable MP3 Players
n
Digital Cameras
800mASingle-CellLi-IonBatteryCharger
(C/10Termination)
CompleteChargeCycle(1100mAhBattery)
VCC
TIMER
PROG
IDET
BAT
800mA
VIN
4.3V TO 8V
4.2V
SINGLE-CELL
Li-Ion BATTERY
+
619
1µF
ACPR
NTC
LTC4061
GND
4061 TA01a
CHRG
EN
C/5
TIME (HOURS)
0
0.5
1.5
2.5
3.0
2.0
900
800
700
600
500
400
300
200
100
0
4.3
4.2
4.1
4.0
3.9
3.8
3.7
3.6
3.5
3.4
4061 TA01b
1.0
BATTERY
CURRENT
BATTERY
VOLTAGE
VCC = 5V
TA = 25°C
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
SmartStart, ThinSOT and PowerPath are trademarks of Linear Technology Corporation. All
other trademarks are the property of their respective owners. Protected by U.S. Patents
including 6522118.


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