EUP8054X Datasheet | Eutech Microelectronics

DESCRIPTION The EUP8054 is a plete constant-current/constantvoltage linear charger for single cell lithium-ion batteries. Its Thin SOT package and low external ponent count make the EUP8054 ideally suited for portable applications. Furthermore, the EUP8054 is specifically designed to work within USB power specifications. No external sense resistor is needed, and no blocking diode is required due to the internal MOSFET architecture. Thermal feedback regulates the charge current to limit the die temperature during high power operation or high .. ambient temperature. The charge voltage is fixed at 4.2V, and the charge current can be programmed externally with a single resistor. The EUP8054 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached. When the input supply (wall adapter or USB supply) is removed, the EUP8054 automatically enters a low current state, dropping the battery drain current to less than 2µA. The EUP8054 can be put into shutdown mode, reducing the supply current to 25µA. Other features include charge current monitor, undervoltage lockout, automatic recharge and a status pin to indicate charge termination and the presence of an input voltage. FEATURES z z z z Programmable Charge Current Up to 800m A No MOSFET, Sense Resistor or Blocking Diode Required plete Linear Charger in Thin SOT Package for Single Cell Lithium-ion Batteries Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating Charges Single Cell Li-Ion Batteries Directly from USB Port Preset 4.2V Charge Voltage with ± 1% Accuracy Charge Current Monitor Output for Gas Gauging Automatic Recharge Charge Status Output Pin C/10 Charge Termination 25µA Supply Current in Shutdown 2.9V Trickle Charge Threshold (EUP8054) Available Without Trickle Charge (EUP8054X) Soft-Start Limits Inrush Current Available in TSOT-25, TDFN-6(3mm- 3mm) Package Ro HS pliant...