钰泰芯片 ETA4255E8A 适用于单节锂离子电池

　　DESCRIPTION

　　ETA4255 is a single cell, fully integrated constant current (CC)/constant voltage (CV) Li-ion battery charger. Its compact package with minimum external components requirement makes the ETA4255 ideal for portable applications. No external sense resistor or blocking diode is necessary for the ETA4255.Build-in thermal feedback mechanism regulates the charge current to control the die temperature during high power operation or at elevated ambient temperature. The ETA4255 has a pre-charge function for trickle charging deeply discharged batteries. 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 1/5 of the programmed value. The ETA4255 keeps monitoring the battery voltage and enables a new charge cycle once the voltage drops by 200mV below the CV value.