P/N : NT2121
The NT2121 is a compact and high-performance single chip PMIC for backup
battery pack applications.
The NT2121 integrates all functions that a backup battery pack needs, including
input power switch, switching charger,
boost converter, LED indication and a smart USB charging port controller.
Features
Full Cycle of Battery Charge Management:
Preconditioning, CC Mode, CV Mode, End of
Charge
High Efficiency Switch Mode Charger
92% Charge Efficiency at 2A
15V Input Surge Protection
Programmable 4.1V to 4.4V Battery Voltage
Programmable up to 2.5A Fast Charge
Current Regulation
Input Voltage Regulation
Chip Temperature Regulation with Foldback
Charge Current
Synchronous Boost Converter
Programmable up to 2.4A Output Current
Regulation
95% Efficiency at 5.1V/1A
Support BC1.2 & YD/T 1591 Battery Charging
Specifications
4 LEDs Battery Level and Status Indication
Battery Impedance Compensation
Boost Auto Turn-off and Push-Botton Turn-on
High Efficiency Switch Mode Charger
95% Charge Efficiency at 5.1V/1A
WQFN4x4-24L Package
RoHS Compliant and Halogen-Free
Applications
Backup Battery Pack
Power Bank
Mobile Power
Standalone Battery Charger with USB Output