ETA4085 Datasheet | ETA

DESCRIPTION FEATURES ETA4085 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 ETA4085 ideal for portable applications. No external sense resistor or blocking diode is necessary for the ETA4085. Build-in thermal feedback mechanism regulates the charge current to control the die temperature during high power operation or at elevated ambient temperature. ETA4085 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. ETA4085 keeps monitoring the battery voltage and enables a new charge cycle once the voltage drops 100m V below the CV value. ETA4085 is in a DFN3x3-10L package. - 30V Input Standoff Voltage - 4.2V Charge Termination Voltage - 2.95V Trickle Charge Threshold - Input Over Voltage Protection - Charge Current Programmable, up to 1A - 400n A BAT Current when No Charging - Charge Conditioning with Safety Timer - Status Output for LED - Soft-start Limits in-rush Current - DFN3x3-10L Package - Ro HS pliant APPLICATIONS - E-cigarette - Toys - Bluetooth Applications - Li-ion Battery Powered Devices TYPICAL APPLICATION INPUT POWER C1 4.7u F R1 R2 1.5K 1.5K RTMR 55.55K 1 IN OUT 10 2 TMR BAT 9 3 STAT1 ETA4085 CE 8 4 STAT2 5 Vss PG 7 ISET 6 R ISET 1.13K Li-ion or Li-Pol Battery Pack C2 2.2u F Pack+ + Pack- Charge Enable And Power...