ETA4054 Datasheet | ETA

DESCRIPTION ETA4054 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 ETA4054 ideal for portable applications. No external sense resistor or blocking diode is necessary for the ETA4054. Build-in thermal feedback mechanism regulates the charge current to control the die temperature during high power operation or at elevated ambient temperature. The ETA4054 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 ETA4054 keeps monitoring the battery voltage and enables a new charge cycle once the voltage drops by 150m V below the CV value. ETA4054 is in a tiny SOT23-5 package. FEATURES - 16V standoff input voltage at VIN and BAT pins - 4.2V charge termination voltage - Charge current programmable, up to 1A - No damage when battery reversely connected - 25u A supply current when standby - Soft-start limits in-rush current - SOT23-5 Package APPLICATIONS - Toys - Bluetooth applications - Li-ion battery powered devices ORDERING INFORMATION PART PACKAGE PIN ETA4054S2F SOT23-5 TOP MARK B1YW TYPICAL APPLICATION 1K 4.7u F 4 VIN BAT 3 1 STAT ISET 5 1u F RISET 2 GND Li+ Battery .etasolution. Powering Minds of the Smart PIN CONFIGURATION STAT 1 GND 2 5 ISET BAT 3 4...