LT3650IMSE-8.4#PBF

Series:	--
Packaging:	Tube
Part Status:	Active
Battery Chemistry:	Lithium-Ion/Polymer
Number of Cells:	2
Current - Charging:	Constant - Programmable
Programmable Features:	Timer
Fault Protection:	Over Temperature
Charge Current - Max:	2A
Battery Pack Voltage:	8.4V
Voltage - Supply (Max):	32V
Interface:	--
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	12-TSSOP (0.118", 3.00mm Width) Exposed Pad
Supplier Device Package:	12-MSOP-EP
Base Part Number:	LT3650

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IntroductionThe LT3650IMSE-8.4#PBF is an intelligent, single-cell Li-ion/polymer battery charger and power pathway manager from LT3650IMSE-8.4#PBF. It is specifically designed for single-cell, low-power and low-voltage applications in cell phones, Bluetooth headsets, and tablets.ApplicationsThe LT3650IMSE-8.4#PBF can be used in a wide range of applications including cell phones, Bluetooth headsets, and tablets. This chip can be used to charge the battery of these devices, as well as provide power for them. It can provide up to 4A of charging current, and can quickly detect and start charging even if the battery is deeply discharged. The LT3650IMSE-8.4#PBF is a cost-effective solution for providing both charging and power management functionality in any number of low-power and low-voltage applications.Aside from charging the battery of a device, the LT3650IMSE-8.4#PBF also provides power management capabilities. It can provide power to the device, as well as detect and switch between different power sources such as wall chargers and USB ports. It can also detect when the battery is fully charged, or when it is too low to be used, and can then switch to a backup power source. The LT3650IMSE-8.4#PBF also has built-in over-voltage, under-voltage, and over-temperature protection, making it a safe choice for any device.The LT3650IMSE-8.4#PBF also provides a low quiescent current of less than 4mA, making it a particularly efficient and cost-effective battery charger. It can also be easily controlled through I2C or SMBus commands, making it incredibly simple to integrate into any design.Working PrincipleThe LT3650IMSE-8.4#PBF works by detecting an input voltage, and then switching to the appropriate charging profile. It works in two stages: pre-regulation, and then regulation.In pre-regulation, the chip first detects the input voltage, and then compares it to the specified threshold. If it is greater than 4.2V, then it will switch to a high-power charging profile, where it can charge at up to 4A. If it is less than 4.2V, then it will switch to a low-power charging profile, where it can only charge at up to 1A. The chip also has an adjustable resistor that can be preset for different charge current values, making it very flexible for various devices.Once the charging profile is determined, the chip then goes into regulation. Here, it starts regulating the charge current, and also making sure that the battery is safely charged. It does this by monitoring the voltage and current across the battery, and then adjusting the charge current accordingly. In order to ensure safety, the chip also has built-in over-voltage, under-voltage, and over-temperature protection, so it can quickly reduce the charge current when conditions become unsafe.ConclusionThe LT3650IMSE-8.4#PBF is an intelligent, single-cell Li-ion/polymer battery charger and power pathway manager. It is specifically designed for low-power and low-voltage applications in cell phones, Bluetooth headsets, and tablets. It can provide up to 4A of charging current, and can quickly detect and start charging even if the battery is deeply discharged. It also provides power management capabilities, and has built-in over-voltage, under-voltage, and over-temperature protection. The chip is also very efficient, with a low quiescent current of less than 4mA, and is easily controlled with I2C or SMBus commands. These features make the LT3650IMSE-8.4#PBF a cost-effective and safe choice for any single-cell, low-power and low-voltage application.

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