S-8254AAEFT-TB-U

Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Function:	Battery Protection
Battery Chemistry:	Lithium-Ion/Polymer
Number of Cells:	3 ~ 4
Fault Protection:	Over Current
Interface:	--
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	16-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:	16-TSSOP

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Introduction to S-8254AAEFT-TB-U

The S-8254AAEFT-TB-U is a highly integrated current and voltage regulator, specifically designed for use in lithium-ion battery applications. The device offers charging, powering and controlling of multiple series/parallel lithium-ion batteries. The S-8254AAEFT-TB-U also provides secondary protection features such as over-current protection, under-voltage lockout and temperature monitoring. The device is ideal for applications that require precise battery control and management.

Application Field

S-8254AAEFT-TB-U application fields include, but not limited to, industrial and consumer devices such as portable electronics, mobile phones, digital cameras, laptops and tablet PCs, portable traction systems and electric vehicles. The device is suitable for battery packs comprising 1 to 4 series cells and 1 to 8 parallel cells.

Working Principle

The S-8254AAEFT-TB-U mainly consists of a current sensor, voltage regulator and secondary protection circuit elements. The current sensor senses the current in the battery and passes this signal on to the voltage regulator. The voltage regulator then regulates the charging voltage of the battery by controlling the output current. The secondary protection circuit elements provide extra protection to the battery by preventing over-charge and over-discharge conditions.The device works in two modes, Continuous Mode and Step-up Mode. In Continuous Mode, the device maintains a constant charging voltage based on the sensing signal from the current sensor. This provides a uniform charging voltage to ensure optimum charging performance. In Step-up Mode, the device increases the charging voltage as the battery current increases, up to a maximum limit. This ensures a faster charging speed and safer charging conditions.The device is also equipped with a Temperature Monitoring Circuit which ensures that the battery never gets too hot due to over-charging. The circuit monitors the temperature of the battery and sends a signal to the voltage regulator when a certain temperature is exceeded. The voltage regulator then reduces the output current to reduce the heat generated in the battery.The S-8254AAEFT-TB-U also provides over-current protection by monitoring the current in the battery and cutting off the output current when it reaches a certain limit. This prevents the battery from being damaged by excessive charging. The device is also equipped with an under-voltage lockout, which cuts off the output current when the battery voltage drops below a certain level. This ensures that the battery is not over-discharged.Finally, the S-8254AAEFT-TB-U is capable of monitoring the state of discharge of the battery. The device is equipped with a gas gauge that measures the amount of charge in the battery and sends a signal to the voltage regulator to indicate when the battery needs to be recharged.

Conclusion

The S-8254AAEFT-TB-U is a highly integrated current and voltage regulator, specifically designed for lithium-ion battery applications. The device offers charging, powering and controlling of multiple series/parallel lithium-ion batteries. The device is ideal for applications that require precise battery control and management. The device also provides secondary protection features such as over-current protection, under-voltage lockout and temperature monitoring.

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