LTC4120IUD-4.2#PBF

Series:	--
Packaging:	Tube
Part Status:	Active
Battery Chemistry:	Lithium-Ion/Polymer
Number of Cells:	1
Current - Charging:	Constant - Programmable
Programmable Features:	--
Fault Protection:	--
Charge Current - Max:	400mA
Battery Pack Voltage:	4.2V
Voltage - Supply (Max):	40V
Interface:	--
Operating Temperature:	-40°C ~ 125°C (TJ)
Package / Case:	16-WFQFN Exposed Pad
Supplier Device Package:	16-QFN (3x3)
Base Part Number:	LTC4120

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Introduction

LTC4120IUD-4.2#PBF is a multi-chemistry battery charger, power path, and load switch controller, designed for use in portable applications. This wide operating range and high performance, multi-chemistry battery charger controller is designed to charge and power manage a range of battery chemistries, including Li-Ion, LiFePO4, NiMH, and NiCd, while extending battery life and providing a safe and reliable power supply.

Application Field

LTC4120IUD-4.2#PBF is a multi-chemistry battery charger, power path, and load switch controller. It can use to charge and power manage a wide range of battery chemistries, including Lithium-Ion, LiFePO4, NiMH, and NiCd, with features such as advanced power management, thermistor compensation, adjustable backup and trickle charging, overvoltage and overdischarge protection, and low-input current-limit control. It can be used for auxiliary power supplies, such as solar, DC/DC and AC/DC, and even fuel cells. It is also used in IoT applications and automotive applications.

Working Principle

The LTC4120IUD-4.2#PBF has several key protection and power management features, which help ensure reliable charging and safe operation of the system. The device has two main electrical private: the power path and the battery charger. The power path contains a low dropout (LDO) control system which maintains the desired output voltage and current limit when input voltage is within a safe operating range. The battery charger consists of a high side current limit circuit and a synchronous Buck/Boost converter. The Buck/Boost converter can convert a higher value input voltage to a lower value output voltage, or a lower value input voltage to a higher value output voltage. In addition, the LTC4120IUD-4.2#PBF includes overvoltage and overdischarge protection, as well as an adjustable backup and trickle charging feature.

Conclusion

The LTC4120IUD-4.2#PBF is a versatile and robust product, designed with features such as its wide operating range, high performance, and multi-chemistry battery charger controller. It is designed to charge and power manage a wide range of battery chemistries, including Li-Ion, LiFePO4, NiMH, and NiCd, while extending battery life and providing a safe and reliable power supply. With its overvoltage and overdischarge protection, adjustable backup and trickle charging, and other features, it is an ideal solution for applications such as auxiliary power supplies, IoT, and automotive.

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