ETA4084 Datasheet | ETA

DESCRIPTION ETA4084 is a fully integrated constant current (CC)/constant voltage (CV) charger for 2 cell Li-ion battery. Its pact package with minimum external ponents requirement makes the ETA4084 ideal for portable applications. No external sense resistor or blocking diode is necessary for the ETA4084. Build-in thermal feedback mechanism regulates the charge current to control the die temperature during high power operation or at elevated ambient temperature. The ETA4084 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 ETA4084 keeps monitoring the battery voltage and enables a new charge cycle once the voltage drops by 150m V below the CV value. ETA4084 is in a tiny SOT23-6 package. FEATURES - 16V standoff input voltage at VIN and BAT pins - 8.4V charge termination voltage - Charge current up to 750m A in SOT23-6 package - No damage when battery reversely connected - 25u A supply current when standby - Soft-start limits in-rush current - SOT23-6 package APPLICATIONS - Toys - Bluetooth applications - Li-ion battery powered devices ORDERING INFORMATION PART ETA4084S2G PACKAGE PIN SOT23-6 TOP MARK Ei YW TYPICAL APPLICATION 4 VIN BAT 3 VBAT / VSYS 4.7u F 1u F 1K 1 STAT ISET 6 2 cells Li + Battery RISET IBAT= 1 Rset ×1000-( 1 3.6 × 1...