ETA40543 Datasheet | ETA

DESCRIPTION ETA40543 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 ETA40543 ideal for portable applications. No external sense resistor or blocking diode is necessary for the ETA40543. Build-in thermal feedback mechanism regulates the charge current to control the die temperature during high power operation or at elevated ambient temperature. The ETA40543 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 ETA40543 keeps monitoring the battery voltage and enables a new charge cycle once the voltage drops by 120m V below the CV value. ETA40543 is in an ESOP8 and SOT23-6 package. FEATURES - 16V input standoff voltage - 4.35V charge termination voltage - 2.9V trickle charge threshold - Charge current programmable, up to 1.2A - 250n A BAT current when no charging - Soft-start limits in-rush current - ESOP8 and SOT23-6 package APPLICATIONS - E-cigarette - Toys - Bluetooth applications - Li-ion battery powered devices TYPICAL APPLICATION VBAT/ VSYS 4.7u F EN 1K STAT ETA40543 NTC 1K STDBY ISET RISET 1u F Li + Battery - STDBY , NTC and EN pins are not available on SOT23-6 package ORDERINGINFORMATION PART No. ETA40543E8A ETA40543S2G PACKAGE ESOP8 SOT23-6 TOP MARK ETA40543 YWW2L E6YW Pcs/Reel 4000 3000 .etasolution....