XA5056
XA5056 is 1A Linear Li-Ion Battery Charger manufactured by XINNA SEMI.
Description
The is a plete constant current & constant voltage linear charger for single cell lithium-ion batteries.
Its SOP package and low external ponent count make the ideally suited for portable applications.
Furthermore, the 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 removed, the automatically enters a low current state, dropping the battery drain current to less than 2u...
