Battery Charger. XA5056 Datasheet
1A Linear Li-Ion Battery Charger
|Total Page||8 Pages|
The is a complete constant current & constant
voltage linear charger for single cell lithium-ion batteries.
Its SOP package and low external component count
ideally suited for portable applications.
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
automatically termin ates 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
automatically enters a low current
state, dropping the battery drain current to less than 2uA.
The 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.
Cellular Telephones, PDAs, MP3 /MP4 Players
Charging Docks and Cradles
Bluetooth 、GPS Applications
Programmable Charge Current Up to 1000mA
Using SOP8 package
1A Linear Li-Ion Battery Charger
No MOSFET, Sense Resistor or Blocking Diode
Complete Linear Charger in SOP 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
Preset 4.2V Charge Voltage with ±1% Accuracy
Charge Current Monitor Output for Gas Gauging
Charge state pairs of output, no battery and fault
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 SOP8-PP Package
Absolute Maximum Ratings
Input Supply Voltage
PROG pin Voltage
BAT pin Voltage
CHAG pin Voltage
BAT pin Current
PROG pin Current
Operating Ambient Temperature
Caution: The absolute maximum ratings are rated values exceeding which the product could suffer physical
damage. These values must therefore not be exceeded under any conditions.
|Features||Datasheet pdf Description The is a complete constant current & constant voltage linear char ger for single cell lithium-ion batteri es. Its SOP package and low external c omponent count make the ideally suite d for portable applications. Furthermo re, the is specifically designed to w ork within USB power specifications. N o external sense resistor is needed, an d no blocking diode is required due to the internal MOSFET architecture. The rmal feedback regulates the charge cur rent to limit the die temperature durin g high power operation or high ambient temperature. The charge voltage is fi xed at 4.2V, and the charge current can be programmed externally with a singl e resistor. The automatically termin a tes the charge cycle when the charge c urrent drops to 1/10th the programmed v alue after the final float voltage is reached. When the input supply (wall a dapter or USB supply) is removed, the automatically enters a low current st ate, dropping the battery drain current to less than 2uA. The .|
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