UNISONIC TECHNOLOGIES CO., LTD UB6054
Preliminary CMOS IC
ONE-CELL STANDALONE LINEAR LITHIUM BATTERY CHARGER
DESCRIPT...
UNISONIC TECHNOLOGIES CO., LTD UB6054
Preliminary
CMOS IC
ONE-CELL STANDALONE LINEAR LITHIUM BATTERY CHARGER
DESCRIPTION
UTC UB6054 is a complete, constant current and constant
voltage linear charger for single cell lithium-ion batteries. Its small size and ability to regulate low charge currents make UTC UB6054 especially well-suited for portable applications using low capacity rechargeable lithium-ion coin cells. Furthermore, UTC UB6054 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. The charge
voltage is fixed at 4.2V, and the charge current can be programmed externally with a single resistor. UTC UB6054 automatically terminates a charge cycle when the charge current drops to 1/10th the programmed value after the final float
voltage is reached.
FEATURES
* Programmable Charge Current Up to 500mA. * No External
MOSFET, Sense Resistor or Blocking Diode Required. * Complete linear charger in ThinSOT Package for Single Cell / Coin Cell Lithium-lon Batteries. * Constant Current / Constant
Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating. * Charges Single Cell Li-lon Batteries Directly form USB Port. * Preset 4.2V Charge
Voltage with High Accuracy about ±1.2%. * Automatic Recharge. * 2.9V Trickle Charge Threshold. * 20µA Supply Current in Shutdown Mode. * Available in a SOT-25 Pacakage. * Charge St...