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LTC4076 Datasheet(PDF) 1 Page - Linear Technology

Part # LTC4076
Description  Dual Input Standalone Li-Ion Battery Charger
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4076 Datasheet(HTML) 1 Page - Linear Technology

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LTC4076
1
4076fa
TheLTC®4076isastandalonelinearchargerthatiscapable
of charging a single-cell Li-Ion battery from both wall
adapter and USB inputs. The charger can detect power at
the inputs and automatically select the appropriate power
source for charging.
No external sense resistor or blocking diode is required
for charging due to the internal MOSFET architecture.
Internal thermal feedback regulates the battery charge
current to maintain a constant die temperature during high
power operation or high ambient temperature conditions.
The float voltage is fixed at 4.2V and the charge current
is programmed with an external resistor. The LTC4076
terminatesthechargecyclewhenthechargecurrentdrops
below the user programmed termination threshold after
the final float voltage is reached. The LTC4076 can be put
into shutdown mode reducing the DCIN supply current to
20µA, the USBIN supply current to 10µA, and the battery
drain current to less than 2µA even with power applied
to both inputs.
Other features include automatic recharge, undervoltage
lockout,chargestatusoutput,powerpresentstatusoutput
to indicate the presence of wall adapter or USB power and
high power/low power mode (C/5) for USB compatible
applications.
Dual Input Battery Charger for Single-Cell Li-Ion
LTC4076
DCIN
USBIN
IUSB
IDC
BAT
HPWR
ITERM
1.24k
1%
2k
1%
1k
1%
WALL
ADAPTER
USB
PORT
1 F
1 F
+ 4.2V
SINGLE CELL
Li-Ion BATTERY
800mA (WALL)
500mA (USB)
4076 TA01
GND
Dual Input Standalone
Li-Ion Battery Charger
TIME (HR)
0
4.2
200
0
400
800
600
1000
1.5
2.5
3.6
3.4
5.0
4.0
3.8
2.5
0
0.5
1.0
2.0
3.0
CONSTANT VOLTAGE
USBIN = 5V
TA = 25°C
RIDC = 1.24k
RIUSB = 2k
HPWR = 5V
Complete Charge Cycle (1100mAh Battery)
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
*Protected by U.S. patents, including 6522118
Charges Single-Cell Li-Ion Batteries from Wall
Adapter and USB Inputs
Automatic Input Power Detection and Selection
Charge Current Programmable up to 950mA from
Wall Adapter Input
C/X Charge Current Termination
Thermal Regulation Maximizes Charge Rate
Without Risk of Overheating*
Preset Charge Voltage with ±0.6% Accuracy
18µA USB Suspend Current in Shutdown
Power Present Status Output
Charge Status Output
Automatic Recharge
Available in a Thermally Enhanced, Low Profile
(0.75mm) 10-Lead (3mm × 3mm) DFN Package
Cellular Telephones
Handheld Computers
Portable MP3 Players
Digital Cameras
FEATURES
DESCRIPTIO
APPLICATIO S
TYPICAL APPLICATIO


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