ETA4050 Datasheet | ETA

DESCRIPTION FEATURES ETA4050 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 ETA4050 ideal for portable applications. No external sense resistor or blocking diode is necessary for the ETA4050. Build-in thermal feedback mechanism regulates the charge current to control the die temperature during high power operation or at elevated ambient temperature. The ETA4050 has the function of pre-charge, 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 pre-charge current and the termination current threshold are programmed by an external resistor as well. The ETA4050 keeps monitoring the battery voltage and enables a new charge cycle once the voltage drops by 100m V below the CV value. ETA4050 is in a DFN2X2-10 package. - 30V Input Standoff Voltage - 4.35V Charge Termination Voltage - Charge Current Programmable, Up to 1A - Pin Selectable USB 100m A or 500m A Maximum Input Current Limit - Programmable Termination Current and Pre- charge Current Threshold - Operation over JEITA Range via Battery NTC - Fixed 10 hours Safety Timer - Soft-start Limits in-rush Current - DFN2X2-10 Package APPLICATIONS - E-cigarette - Toys - Wearable Devices - Li-ion Battery Powered Devices TYPICAL APPLICATION 1 VIN ISET2 7 1.5K 5 n PG ETA4050 1.5K 8 n CHG BAT 10 4.7u F Option al C ISET R ISET R PRET ER M 2 ISET 4 PRETERM GND 3 TS 9 High: Input current limit =500m A Float: Input current limit=100m A Low: Input current limit=ISET System Load Li + Batt ery 2.2u F ORDERING INFORMATION PART No. ETA4050D2K PACKAGE TOP MARK DFN2X2-10...