鈺泰 ETA4054 SOT-23-5 電池充電管理芯片

　　DESCRIPTION

　　ETA4054 is a single cell, fully integrated constant current

　　(CC)/constant voltage (CV) ion battery charger. Its

　　compact package with minimum external components

　　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 l/l0th of the

　　programmed value. The E TA4054 keeps monitoring the

　　battery voltage and enables a new charge cycle once the

　　voltage drops by 150mV 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 up to 750mA in S0T23-5 package .

　　No damage when battery reversely connected

　　25uA supply current when standby

　　Soft-start limits in-rush current

　　S0123-5 Package

　　APPLICATIONS

　　Toys

　　Bluetooth applications

　　Li-ion battery powered devices