CXLB7248B a complete constant-current/constant voltage linear charger for single cell lithium-ion batteries. Its ThinSOT package and low external component count make the CXLB7248B ideally suited fo

   产品概述 返回TOPkHv嘉泰姆

The CXLB7248B is a complete constant-current/constant voltage linear charger for single cell lithium-ion batteries. Its ThinSOT package and low external component count make the CXLB7248B ideally suited for portable applications. Furthermore, the CXLB7248B 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 CXLB7248B 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 CXLB7248B automatically enters a low current state, dropping the battery drain current to less than 2μA. The CXLB7248B can be put into shutdown mode, reducing the supply current to 25μA. Other features include charge current monitor, under voltage lockout, automatic recharge and a status pin to indicate charge termination and the presence of an input voltage.

   产品特点 返回TOPkHv嘉泰姆

¾ Programmable Charge Current Up to 800mA kHv嘉泰姆

¾ No MOSFET, Sense Resistor or Blocking Diode Required kHv嘉泰姆

¾ Complete Linear Charger in ThinSOTTM Package for Single Cell Lithium-Ion Batteries kHv嘉泰姆

¾ Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating kHv嘉泰姆

¾ Charges Single Cell Li-Ion Batteries Directly from USB Port kHv嘉泰姆

¾ Preset 4.2V Charge Voltage with ±1% Accuracy kHv嘉泰姆

¾ Charge Current Monitor Output for Gas Gauging kHv嘉泰姆

¾ Automatic Recharge kHv嘉泰姆

¾ Charge Status Output Pin kHv嘉泰姆

¾ C/10 Charge Termination kHv嘉泰姆

¾ 25mA Supply Current in Shutdown kHv嘉泰姆

¾ 2.9V Trickle Charge Threshold kHv嘉泰姆

¾ Soft-Start Limits Inrush Current kHv嘉泰姆

¾ Available in 5-Lead SOT-23 Package kHv嘉泰姆

¾ When using a single lamp,the light is completely extinguished after fully charging.kHv嘉泰姆

   应用范围 返回TOPkHv嘉泰姆

¾ Cellular Telephones, PDAs, MP3 Players kHv嘉泰姆

¾ Charging Docks and Cradles kHv嘉泰姆

¾ Bluetooth Applications.kHv嘉泰姆

   技术规格书（产品PDF) 返回TOP kHv嘉泰姆

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