ETA4048
DESCRIPTION
ETA4048 is a single cell, fully integrated constant current (CC)/constant voltage (CV) Li-ion battery charger. Its pact package with minimum external ponents requirement makes the ETA4048 ideal for portable applications. No external sense resistor or blocking diode is necessary for the ETA4048. Build-in thermal feedback mechanism regulates the charge current to control the die temperature during high power operation or at elevated ambient temperature. The ETA4048 has the function of precharge, which can charge the deeply discharged batteries by trickle. The fast charge current can be programmed by an external resistor. CV regulation mode is automatically enabled once the battery’s charging curve reaches the constant voltage portion. The output current then decays and is finally terminated once the charge current drops to 1/10 of the programmed value. The ETA4048 keeps monitoring the battery voltage and enables a new charge cycle once the voltage drops by 135m V below the CV...
