LTC1731EMS8-4.2#PBF

Series:	--
Packaging:	Tube
Part Status:	Active
Battery Chemistry:	Multi-Chemistry
Number of Cells:	1
Current - Charging:	Constant - Programmable
Programmable Features:	Timer
Fault Protection:	--
Charge Current - Max:	500mA
Battery Pack Voltage:	4.2V
Voltage - Supply (Max):	12V
Interface:	--
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package:	8-MSOP
Base Part Number:	LTC1731

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Introduction
The LTC1731EMS8-4.2#PBF is a voltage regulator chip used in power management integrated circuits (PMICs) and battery charging systems. It is a high-efficiency, high-performance, integrated regulator designed to provide superior battery charging and system power stability. The LTC1731EMS8-4.2#PBF provides up to 32V regulated output voltages for charging Li-ion, Li-polymer, alkaline and lead acid batteries. The chip supports both block and float charging modes and provides over voltage, over current and temperature protection. The LTC1731EMS8-4.2#PBF is widely used in various PMIC applications, such as cellular phones, digital cameras, handheld devices, electric bikes, automotive applications and portable audio systems.Application fields of LTC1731EMS8-4.2#PBF
The LTC1731EMS8-4.2#PBF is designed for use in power management integrated circuits (PMICs) and battery charging systems. The chip is suitable for charging lead acid, alkaline and Li-ion/Li-polymer batteries. It offers excellent efficiency, low drop-out voltage, wide voltage range and fast transient performance. The chip provides over voltage, over current and temperature protection, making it ideal for high reliability applications. The LTC1731EMS8-4.2#PBF is ideal for use in mobile applications, such as cellular phones, digital cameras, handheld devices and portable audio systems. It can also be used in automotive applications, such as electric bikes, scooters and cars.Working Principle of LTC1731EMS8-4.2#PBF
The LTC1731EMS8-4.2#PBF regulates output voltage by sensing the battery voltage and controlling an external N-channel MOSFET switch. The LTC1731EMS8-4.2#PBF contains an adjustable voltage regulator with a current limit of 1A. The regulator has a reference voltage of 2.25V. When the battery voltage reaches the set point, the LTC1731EMS8-4.2#PBF enters current limit mode and the voltage stops increasing. The battery is then charged at a constant current until the current drops below a certain level, at which point the battery is fully charged. The current limit can also be programmed via pin. The LTC1731EMS8-4.2#PBF supports both block and float charging modes. In block charging, the charging current is limited to a certain level. In float charging mode, the voltage is held constant at the set level.Conclusion
The LTC1731EMS8-4.2#PBF is a voltage regulator chip used in PMICs and battery charging systems. It is designed to provide superior battery charging and system power stability. The LTC1731EMS8-4.2#PBF provides up to 32V regulated output voltages for charging Li-ion, Li-polymer, alkaline and lead acid batteries. The chip supports both block and float charging modes and provides over voltage, over current and temperature protection. The LTC1731EMS8-4.2#PBF is widely used in various PMIC applications, such as cellular phones, digital cameras, handheld devices, electric bikes, automotive applications and portable audio systems.

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