LT3652HVEMSE#TRPBF

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Battery Chemistry:	Multi-Chemistry
Number of Cells:	4 ~ 5
Current - Charging:	Constant - Programmable
Programmable Features:	Current, Timer
Fault Protection:	--
Charge Current - Max:	2A
Battery Pack Voltage:	18V (Max)
Voltage - Supply (Max):	34V
Interface:	--
Operating Temperature:	-40°C ~ 125°C (TJ)
Package / Case:	12-TSSOP (0.118", 3.00mm Width) Exposed Pad
Supplier Device Package:	12-MSOP-EP
Base Part Number:	LT3652

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LT3652HVEMSE#TRPBF Application Field and Working Principle

The LT3652HVEMSE#TRPBF Battery Charger is a high-efficiency, high-voltage DC-DC step-up controller/regulator IC, specifically designed to be used in multi-cell Lithium-ion/Lithium-polymer battery packs, from 4.2V to 14.8V. This part is ideally suited for charging high-voltage 4-cell and higher (up to 16-cells) Lithium-ion/Lithium-polymer battery packs. The LT3652HVEMSE#TRPBF can be configured for a wide variety of battery chemistries and charge currents.

Features

The primary features of this battery charger include:- High Voltage: up to 16-cell lithium battery packs (14.8V).- Pre-Charge: Fast pre-charge constant current, then constant voltage mode.- Float Current: Constant float current with user-settable current limit.- Safety Features: High temperature, charge overcurrent and input voltage protection.- Programmable Input Source: Two LED control pins with user-programmable input source control.

Application Field

The LT3652HVEMSE#TRPBF can be used in a variety of applications, including:- Portable Electronics: Battery packs in smartphones and tablets, for charging and extending the battery life.- Hearable Devices: Battery packs in hearing aids, for charging and promoting the device’s performance.- Wearable Devices: Battery packs in smartwatches, fitness trackers, and wristbands, for charging and maintaining the device’s function.- Automotive Electronics: Battery packs in self-driving and electric vehicles, for charging and powering onboard electronics.

Working Principle

The LT3652HVEMSE#TRPBF is designed to take a high input voltage and step it up to a higher battery voltage. In order to do this, the charger needs to have the necessary components, such as linear voltage regulators and voltage comparators. The linear voltage regulators will condition the input voltage and provide constant current to the battery. The voltage comparators will monitor the battery voltage and turn off the current when the battery reaches the pre-set voltage level.During charging, the LT3652HVEMSE#TRPBF will provide a constant current to the battery until it reaches a preset voltage level. The battery is then switched to a constant voltage mode, where it is maintained with a steady trickle current. When the battery is discharged, the charger will automatically recharge it, maintaining the battery at its full charge level. The integrated safety features protect the battery from overcharging, high temperature, and excessive input current.

Conclusion

The LT3652HVEMSE#TRPBF is a versatile and reliable charger, capable of charging a wide range of batteries with differing chemistries, voltages, and currents. This charger is ideal for applications such as smartphones, tablets, hearables, wearables, and electric vehicles, thanks to its high voltage capacity, pre-charge mode, and integrated safety features. To achieve its charging performance, the charger relies on linear voltage regulators and voltage comparators to adjust the input voltage, provide a constant current to the battery, and maintain the battery at its full charge level.

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