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A4053 Schematic ( PDF Datasheet ) - AiT Semiconductor

Teilenummer A4053
Beschreibung 1A LINEAR LI-ION BATTERY CHARGER
Hersteller AiT Semiconductor
Logo AiT Semiconductor Logo 




Gesamt 10 Seiten
A4053 Datasheet, Funktion
AiT Semiconductor Inc.
www.ait-ic.com
A4053
BATTERY MANAGEMENT
1A LINEAR LI-ION BATTERY CHARGER
DESCRIPTION
FEATURES
The A4053 is a complete constant current & constant
voltage linear charger for single cell lithium-ion
batteries. Its P-MSOP package and low external
component count make the A4053 ideally suited for
portable applications. Furthermore, the A4053 is
specifically designed to work within USB power
specifications.
No external sense resistor is needed, and no blocking
diode is required due to the internal MOSFET
architecture. Thermal feedback regulates the charge
current to limit the die temperature during high power
operation or high ambient temperature. The charge
voltage is fixed at 4.2V, and the charge current can
be programmed externally with a single resistor. The
A4053 automatically terminates the charge cycle
when the charge current drops to 1/10th the
programmed value after the final float voltage is
reached.
When the input supply (wall adapter or USB supply)
is removed, the A4053 automatically enters a low
current state, dropping the battery drain current to
less than 2uA. The A4053 can be put into shutdown
mode, reducing the supply current to 50uA.
Other features include Battery temperature monitor,
under-voltage lockout, automatic recharge and two
status pins to indicate charge and charge termination.
The A4053 is available in P-MSOP8 Package
Programmable Charge Current Up to 1000mA
No MOSFET, Sense Resistor or Blocking Diode
Required
Complete Linear Charger in MSOP Package for
single Cell Lithium-Ion Batteries
Constant-Current/Constant-Voltage Operation
with Thermal Regulation to Maximize Charge
Rate Without Risk of Overheating
Charges Single Cell Li-Ion Batteries Directly
from USB Port
Preset 4.2V Charge Voltage with ±1%
Accuracy
Charge Current Monitor Output for Gas Gauging
Automatic Recharge
Charge state pairs of output, no battery and fault
status display
C/10 Charge Termination
50uA Supply Current in Shutdown
2.9V Trickle Charge Threshold
Soft-Start Limits Inrush Current
Battery temperature monitoring function
Available in P-MSOP8 Package
APPLICATION
Cellular Telephones, PDAs, MP3 /MP4 Players
Charging Docks and Cradles
Bluetooth GPS Applications
TYPICAL APPLICATION
ORDERING INFORMATION
Package Type
Part Number
P-MSOP8
MSP8
A4053MSP8R
A4053MSP8VR
Note
R: Tape & Reel
V: Halogen free package
AiT provides all RoHS products,
suffix “ V “ means Halogen free Package
REV2.1
- JUL 2012 RELEASED, SEP 2012 UPDATED -
-1-






A4053 Datasheet, Funktion
AiT Semiconductor Inc.
www.ait-ic.com
A4053
BATTERY MANAGEMENT
1A LINEAR LI-ION BATTERY CHARGER
7. PROG Pin Voltage vs Temperature
8. Charge Current vs PROG Pin Voltage
9. Trickle Charge Threshold vs Temperature
10. Recharge Voltage Threshold vs Temperature
11. Charge Current vs Ambient Temperature
12. PROG Pin Pull-Up Current vs Temperature and
Supply Voltage
REV2.1
- JUL 2012 RELEASED, SEP 2012 UPDATED -
-6-

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