LTC4085EDE-1#TRPBF

Series:	PowerPath™
Packaging:	Tape & Reel (TR)
Part Status:	Active
Battery Chemistry:	Lithium-Ion
Number of Cells:	1
Current - Charging:	Constant - Programmable
Programmable Features:	--
Fault Protection:	--
Charge Current - Max:	1.5A
Battery Pack Voltage:	4.1V
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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Introduction

The LTC4085EDE-1#TRPBF is a PMIC (Power Management IC) specifically designed to provide a safe battery charging solution for single lithium-ion (Li-Ion) cells. As an advanced battery charger, the LTC4085EDE-1#TRPBF includes an integrated Li-Ion battery charger, one internal power MOSFET and an adjustable-voltage linear regulator. It offers programmable charge control, charge termination and three LED drivers.

Features

The LTC4085EDE-1#TRPBF offers a wide range of features designed to optimize power management, thereby providing the user with an efficient battery charging solution. These features include: programmable charge current, charge voltage, and termination current; thermal regulation for heat dissipation; adjustable soft-start/end charging; an efficient, low-R DS(ON) buck switch; unique LED drivers with fault indication; and protection against overvoltage and short circuit.

Application Field

The LTC4085EDE-1#TRPBF is suitable for a wide range of applications, including portable medical devices, tablet PCs and other portable high-power applications. In addition, the LTC4085EDE-1#TRPBF is also very useful in embedded system designs that require efficient power management.

Working Principle

The LTC4085EDE-1#TRPBF works by controlling the flow of power from the primary power source (e.g. AC adapter, USB or battery) to the Li-Ion battery. The integrated Li-Ion battery charger and the internal power MOSFET work together to manage the power flow. The integrated Li-Ion battery charger provides the necessary voltage to the battery, while the internal power MOSFET acts as a switch, allowing the charger to be turned on and off.When the battery voltage is lower than the programmed charge voltage, the integrated Li-Ion battery charger is activated. This converts the input source (AC adapter, USB, battery) into the necessary voltage for charging. The internal power MOSFET switches on to allow the charger to start charging the Li-Ion battery.The LED drivers of the LTC4085EDE-1#TRPBF offer fault indication; if an abnormal situation is detected (e.g. over-voltage, short circuit, etc.), the LED driver will turn off automatically to indicate a fault. The LTC4085EDE-1#TRPBF also provides thermal regulation, which helps to dissipate heat generated during charging and protect the Li-Ion battery from overheating.

Conclusion

The LTC4085EDE-1#TRPBF is a versatile and powerful PMIC designed to efficiently manage the power flow to and from Li-Ion batteries in a wide range of applications. Its integrated Li-Ion battery charger, internal power MOSFET and adjustable-voltage linear regulator, along with its other features, ensure a safe and efficient battery charging process.

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