NCP1851AFCCT1G

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Not For New Designs
Battery Chemistry:	Lithium-Ion
Number of Cells:	1
Current - Charging:	Constant - Programmable
Programmable Features:	--
Fault Protection:	Over Voltage
Charge Current - Max:	--
Battery Pack Voltage:	4.5V (Max)
Voltage - Supply (Max):	7.3V
Interface:	I²C, USB
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	25-UFBGA, FCBGA
Supplier Device Package:	25-FlipChip (2.55x2.2)

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Introduction

A battery charger is a device used to replenish the stored energy from a Li-Ion, Li-Polymer, Lead Acid, Nickel Metal Hydride, or other type of battery cells. Battery Charger technologies have been widely used in portable consumer electronics, medical, automotive and industrial applications for battery power management. Among the charging techniques is a common technology called PMIC – battery charger, or Pulse Modulated Integrated Circuit (PMIC) battery charger. NCP1851AFCCT1G is a PMIC battery charger that claims to be 99 percent efficient. It is used mainly in portable consumer electronics such as smartphones (including those in the iPhone 6 and 7 series). With its high efficiency, charge current accuracy, and fast charge termination, it is an ideal choice for achieving the most efficient battery charging in small form factor applications.

Application Field and Working Principle

NCP1851AFCCT1G is a three-phase switching type PMIC battery charger that is designed to charge multiple Li-Ion, Li-Polymer, Nickel Metal Hydride, or Lead Acid Battery Cells from 4.2V down to 0V. The low power consumption and fast charge termination allows for longer operation on a single battery charge. It can deliver up to 1.8A charge current and support a variety of charge profiles including 12 hour, 24 hour, and 48 hour charging cycles.The internal switching architecture of the NCP1851AFCCT1G enables high efficiency and precise charge current accuracy under a wide range of conditions. It uses an adaptive feedback scheme to track the battery’s state-of-charge and terminates the charge current once the battery reaches its full capacity. This ensures safe and precise battery charging, while avoiding potential overcharging or undercharging scenarios.In addition, NCP1851AFCCT1G comes with a number of features such as the over voltage protection, short circuit protection, over-discharge protection, and under voltage protection to ensure that battery cells are properly monitored during the charging process. It also features a high efficiency of up to 99% over a wide range of load.

Advantage and Disadvantage of NCP1851AFCCT1G

The advantages of the NCP1851AFCCT1G PMIC battery charger include high efficiency, accurate charge current, fast charge termination and safe operation. High efficiency is achieved by controlling the output voltage according to the battery charging requirement and allowing for higher charge current capabilities.The accuracy of charge current allows for precise control of the duration of the charging process, thereby increasing the longevity of the battery. The fast charge termination avoids the potential of overcharging and ensures safe operation of the device.The only disadvantage of the NCP1851AFCCT1G is that it does not support charging of other types of batteries such as NiCd or NiMH. Also, the maximum charge current is limited to 1.8A, which may not be sufficient for some applications.

Conclusion

The NCP1851AFCCT1G is an ideal choice of PMIC battery charger for portable consumer electronics and other small form factor applications. It offers a high efficiency of 99 percent, precise charge current accuracy and fast charge termination, which ensure safe and efficient operation. It supports a range of battery types including Li-Ion, Li-Polymer, and Lead Acid, but does not support NiCd or NiMH. The maximum charge current is limited to 1.8A and should be taken into consideration when making a purchase.

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