FAN5421BUCX

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Not For New Designs
Battery Chemistry:	Lithium-Ion/Polymer
Number of Cells:	1
Current - Charging:	Constant - Programmable
Programmable Features:	Current, Timer, Voltage
Fault Protection:	Over Temperature, Over Voltage, Short Circuit
Charge Current - Max:	1.5A
Battery Pack Voltage:	--
Voltage - Supply (Max):	6.8V
Interface:	I²C
Operating Temperature:	-30°C ~ 85°C (TA)
Package / Case:	20-UFBGA, WLCSP
Supplier Device Package:	20-WLCSP
Base Part Number:	FAN5421

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Introduction

FAN5421BUCX is a high-efficiency, cost-effective synchronous buck battery charger that can be used to charge various kinds of lithium-ion battery. It is designed for use in portable electronic devices, such as cellphones and tablets. This PMIC - Battery Chargers provide an easy, low-cost and reliable solution for charging a wide range of lithium-ion batteries.

Features

FAN5421BUCX has a wide input voltage range that allows it to work with a variety of power sources. It also has a wide output voltage range that can be adjusted to meet the needs of different lithium-ion cells. It is designed to be used in applications where space is limited and efficient operation is essential. The FAN5421BUCX features over-voltage protection for both input and output, as well as under-voltage protection. It also includes a temperature monitor that can monitor the temperature of the battery pack, allowing the user to set the appropriate charge voltage and current. Additionally, it incorporates a programmable timer that can be used to ensure that the battery is not overcharged or discharged.

Application Field

The most popular application field of FAN5421BUCX is as a charge controller for mobile phones, tablets and other portable electronic devices. It can also be used in other applications where it is necessary to charge lithium-ion batteries. These applications include electric vehicles, power tools, medical equipment, robotic systems, military equipment and the like.

Working Principle

The FAN5421BUCX utilizes a synchronous buck topology to convert the input voltage and current into the desired output voltage and current. The synchronous buck topology allows for high efficiency operation and a low component count. The control circuit monitors the charging voltage and current and adjusts the controls so that the desired output voltage and current is maintained.When charging a lithium-ion battery, an over-voltage protection circuit is used to ensure that the battery is not overcharged. Additionally, an under-voltage protection circuit is used to prevent the battery from being discharged below the allowable level. It is important to ensure that the battery is not overcharged or discharged, as this can lead to permanent damage or even potential risk of fire. The programmable timer is used to ensure that the battery is given the appropriate amount of time to charge.

Conclusion

FAN5421BUCX is a high-efficiency, cost-effective synchronous buck battery charger that can be used to charge various kinds of lithium-ion battery. It is designed for use in portable electronic devices, electric vehicles, power tools, medical equipment, robotic systems, military equipment and the like. Its features include a wide input voltage range, wide output voltage range, over-voltage and under-voltage protection, temperature monitor, and programmable timer. The FAN5421BUCX utilizes a synchronous buck topology to convert the input voltage and current into the desired output voltage and current. The synchronous buck topology allows for high-efficiency operation and a low component count.

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