LTC4085EDE-3#TRPBF

Series:	PowerPath™
Packaging:	Tape & Reel (TR)
Part Status:	Active
Battery Chemistry:	Lithium-Ion/Polymer
Number of Cells:	1
Current - Charging:	Constant - Programmable
Programmable Features:	--
Fault Protection:	--
Charge Current - Max:	1.5A
Battery Pack Voltage:	3.95V
Voltage - Supply (Max):	5.5V
Interface:	USB
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	14-WFDFN Exposed Pad
Supplier Device Package:	14-DFN (4x3)
Base Part Number:	LTC4085

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PMIC – Battery Chargers

PMIC (Power Management ICs) are integrated circuits that can manage power for a wide variety of applications. Battery Chargers are a specific type of PMICs that are used to charge and maintain charge levels on batteries of various sizes and capacities. The LTC4085EDE-3#TRPBF is a popular battery charger IC that is used in many cellphone, tablet, and other portable device applications due to its ability to accurately monitor, charge, and maintain various size batteries.The main components of the LTC4085EDE-3#TRPBF are an analog and digital controller, a pass transistor, and a charge pump adjustment circuit. The IC monitors the voltage and current levels of the battery and takes measurements of both for its control purposes. The pass transistor is used to regulate the current passed through the battery from the power source and the charge pump adjustment circuit adjusts the voltage levels that are monitored.The LTC4085EDE-3#TRPBF can be used to charge most common types of single-cell rechargeable batteries such as lithium-ion and NiMH as well as non-rechargeable lithium and alkaline batteries. The IC is capable of charging with low-cost current-limited sources and provides maximum flexibility with fast-charge and trickle-charge support. It can also detect bad batteries and will not allow charging if it detects one.The LTC4085EDE-3#TRPBF has several safety features that make it well-suited for portable device applications. It monitors output, input, and battery voltages at all times and will shut off the power if any of these parameters goes beyond acceptable levels. The IC is also capable of setting temperature limits and will shut off the charging procedure if the temperature is too high. The LTC4085EDE-3#TRPBF has several charge modes including fast-charge, trickle-charge, and top-off features. Fast-charge uses a current limited connection to charge the battery quickly with a maximum current setting. Trickle-charge is used for overnight charging with a low current setting. Top-off is used to reduce the voltage levels on the battery to a safe level which helps to reduce power-loss during periods of inactivity.The LTC4085EDE-3#TRPBF also has a counter system that keeps track of how many charging cycles the battery has gone through. This helps to monitor how much life the battery has left and when it should be replaced. These features make the LTC4085EDE-3#TRPBF an ideal IC for portable device applications, where accuracy and reliable charging are essential.

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