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NCP1800
Single-Cell Lithium Ion Battery Charge Controller
NCP1800
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
Host or LED
Host
Processor
Vin
GND
Cin
PMOS/Schottky (FETKY�): NTHD4P02FT1 (ChipFET�)
PMOS: NTGS3441T1 (TSOP 6)
Schottky: MBRM130L
RCOMP = 15 �, CCOMP = 560 nF
