Single-Cell Lithium Ion Battery Charge Controller

   The NCP1800 is a constant current, constant voltage (CCCV) lithium ion battery charge controller. The external sense resistor sets the full charging current, and the termination current is 10% of the Full−Charge current (0.1 C). The voltage is regulated at ±1% during the final charge stage. There is virtually zero drain on the battery when the input power is removed.

FEATUREs
• Pb−Free Package is Available
• Integrated Voltage and Programmable Current Regulation
• Integrated Cell Conditioning for Deeply Discharged Cell
• Integrated End of Charge Detection
• Better than 1% Voltage Regulation
• Charger Status Output for LED or Host Processor Interface
• Charge Interrupt Input
• Safety Shutoff for Removal of Battery
• Adjustable Charge Current Limit
• Input Over and Undervoltage Lockout
• Micro8
Package

APPLICATIONs
• Cellular Phones, PDAs
• Handheld Equipment
• Battery Operated Portable Devices