ETA4049 Datasheet | ETA

DESCRIPTION ETA4049 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 ETA4049 ideal for portable applications. No external sense resistor or blocking diode is necessary for the ETA4049. Build-in thermal feedback mechanism regulates the charge current to control the die temperature during high power operation or at elevated ambient temperature. The ETA4049 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 the current threshold set by RIBF. The ETA4049 keeps monitoring the battery voltage and enables a new charge cycle once the voltage drops by 200m V below the CV value. ETA4049 is in a DFN3x3-10 package. FEATURES - 30V Input Standoff Voltage - 4.2V Charge Termination Voltage - 2.6V Trickle Charge Threshold - Input Over Voltage Protection - Charge Current Programmable, up to 1A - 400n A BAT Current when No Charging - Soft-start Limits in-rush Current - DFN3x3-10 Package - Ro HS pliant APPLICATIONS - E-cigarette - Toys - Bluetooth Applications - Li-ion Battery Powered Devices TYPICAL APPLICATION VIN 4.7u F n EN 1.5K 1.5K 1 VIN BAT 10 3 STAT NTC 9 2 STDBY ISET 8 R1 RNTC RISET 6 n EN IBF 7 4 TMR GND RIBF CTMR VBAT/VSYS Li+ Battery 2.2u F ORDERING INFORMATION PART...