Description
The HX6001F is a complete constant current/constant voltage linear charger for single cell lithium-ion batteries. Its package and low external component count make the HX6001F ideally suited for portable applications. Furthermore, the HX6001F 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. The HX6001F automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached.
The HX6001F converters are available in the industry standard SOT-23-5L power packages (or upon request).
Applications
Ø Charger for Li-Ion Coin Cell Batteries
Ø Portable MP3 Players, Wireless Headsets
Ø Bluetooth Applications
Ø Multifunction Wristwatches
Features
Ø Programmable Charge Current up to 1A
Ø No MOSFET, Sense Resistor or Blocking Diode Required
Ø Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate
Ø Charges Single Cell Li-Ion Batteries Directly from USB Port
Ø Preset 4.2V Charge Voltage with 1% Accuracy
Ø Automatic Recharge
Ø 2.9V Trickle Charge Threshold
Ø Available in 5-Lead SOT-23 Package