FAN5403UCX Integrated Circuits (ICs)

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
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:	1.25A
Battery Pack Voltage:	4.5V (Max)
Voltage - Supply (Max):	6V
Interface:	I²C, USB
Operating Temperature:	-30°C ~ 85°C (TA)
Package / Case:	20-UFBGA, WLCSP
Supplier Device Package:	20-WLCSP (1.96x1.87)
Base Part Number:	FAN5403

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Introduction

The FAN5403UCX is a high performance, integrated power management integrated circuit (PMIC). It is designed to regulate and monitor the charging of Li-ion batteries. This article will provide a comprehensive overview of the FAN5403UCX’s application field and working principle.

Application Field

The FAN5403UCX is a high efficiency, integrated power management IC (PMIC) targeted towards multi-cell Li-ion and Li-polymer battery charge and discharge systems. It is designed to efficiently regulate and manage the charging and discharging of Li-ion batteries, offering several features that make it an ideal choice for battery-powered systems, including narrow voltage regulation and accurate monitoring of battery current and temperature.The FAN5403UCX is capable of regulating charger input current and output voltages, providing fast and reliable charging of Li-ion or Li-polymer batteries of up to 16 series and 4 parallel configuration. In addition, this PMIC features a wide operating temperature range, enhanced protection features, and an open source C/C++ based charge control software.The FAN5403UCX is suitable for use in a wide range of applications, including energy storage systems such as uninterruptible power supplies (UPS), medical and home appliances, portable computing devices, and IoT and automation applications.

Working Principle

The FAN5403UCX is a buck-boost integrated circuit that uses a buck-boost architecture from input to output. It provides a low-dropout (LDO) regulator to ensure fast, reliable, and accurate input/output regulation.The input voltage is stepped down by the application of buck-boost technology, and this is then used to power the rest of the circuit. The output of the circuit is then regulated by a boost converter, with the output being either a constant voltage or a constant current.In addition, the FAN5403UCX features several charging modes, such as constant current/constant voltage (CC/CV) charging and fast-charge current-limited (FCCL) charging. The device also offers over voltage protection (OVP) to protect against overcharging, as well as several safety features such as input UVLO, output UVLO and over temperature protection (OTP).

Conclusion

The FAN5403UCX is a high efficiency integrated circuit that is designed to regulate and monitor the charging of Li-ion and Li-polymer batteries. This PMIC offers fast and reliable charging of Li-ion or Li-polymer batteries of up to 16 series and 4 parallel configuration in a wide range of applications. It is capable of regulating charger input current and output voltages and provides several charging modes to choose from, as well as enhanced protection features. This article has provided an overview of the FAN5403UCX’s application field and working principle, and given some insight into why this PMIC is well-suited for use in battery-powered systems.

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