钰泰原装芯片 ETA4052D3K 全集成线性充电器

　　DESCRIPTION

　　ETA4052 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 ETA4052 ideal for portable applications. No external sense resistor or blocking diode is necessary for the ETA4052. Build-in thermal feedback mechanism regulates the charge current to control the die temperature during high power operation or at elevated ambient temperature. The ETA4052 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 1/10th of the programmed value. The ETA4052 keeps monitoring the battery voltage and enables a new charge cycle once the voltage drops by 120mV below the CV value.