ETA4051 Datasheet | ETA

DESCRIPTION ETA4051 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 ETA4051 ideal for portable applications. No external sense resistor or blocking diode is necessary for the ETA4051. Build-in thermal feedback mechanism regulates the charge current to control the die temperature during high power operation or at elevated ambient temperature. The ETA4051 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 ETA4051 keeps monitoring the battery voltage and enables a new charge cycle once the voltage drops by 135m V below the CV value. ETA4051 is in a SOT23-5 package. FEATURES - 30V Input Standoff Voltage - 4.35V 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 - SOT23-5 Package APPLICATIONS - E-cigarette - Toys - Bluetooth Applications - Li-ion Battery Powered Devices TYPICAL APPLICATION 1.5K 4.7u F 4 VIN BAT 3 1 STAT ISET 5 2.2u F RISET 2 GND Li+ Battery ORDERING INFORMATION PART No. ETA4051S2F PACKAGE SOT23-5 TOP MARK KEYW Pcs/Reel 3000 .etasolution. Empower Thinkers PIN CONFIGURATION STAT 1 GND 2 BAT 3 5 ISET 4...