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NCP1800DM42R2
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 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 Under Voltage Lockout Micro8 Package
Applications Cellular Phones, PDAs Handheld Equipment Battery Operated Portable Devices
Figure 1. Typical ApplicationHost or LED
Host
Processor
Vin
GND
Cin
PMOS/Schottky (FETKY�): NTHD4P02FT1 (ChipFET�)
PMOS: NTGS3441T1 (TSOP 6)
Schottky: MBRM130L
RCOMP = 15 �, CCOMP = 560 nF
