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IA1407 is a complete constant-current & constant voltage linear charger for single cell lithium-ion and Lithium-Polymer batteries.  Its DFN8 package and low external component count make IA1407 ideally suited for portable applications.  Furthermore, the IA1407 is specifically designed to work within USB power specification.  At the same time, IA1407 can also be used in the standalone lithium-ion and Lithium-polymer battery chargers. 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 Started with 4.2V, and the charge current can be programmed externally with a single resistor.  The IA1407 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 IA1407 automatically enters a low current stage, dropping the battery drain current to less than 1uA.  The IA1407 can be put into shutdown mode, reducing the supply current to 55uA.

Other features include charge current monitor, undervoltage lockout, automatic recharge and a status pin to indicate charge termination and the presence of an input voltage. IA1407 is intentionally designed to have slightly negative Tempco. This provides extra protection to Lithium battery during charging. 

Features:

BAT short circuit IC stop working

No MOSFET, Sense Resistor or Blocking Diode Required.

VIN voltage is too high chip automatically stop working

Compatible size 1A programmable charge current.

Preset 4.2V Charge Voltage with ±1% Accuracy

Constant-Current/Constant-Voltage Operation with Thermal Protection to Maximize Charge Rate without Risk of Overheating.

Typical Application: