AAT3681AIJS-4.2-4-T1

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Battery Chemistry:	Lithium-Ion/Polymer
Number of Cells:	1
Current - Charging:	Constant - Programmable
Programmable Features:	--
Fault Protection:	Over Temperature, Over Voltage, Short Circuit
Charge Current - Max:	500mA
Battery Pack Voltage:	4.2V
Voltage - Supply (Max):	7.5V
Interface:	USB
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	8-TFSOJ (0.069", 1.75mm Width)
Supplier Device Package:	8-SC70JW

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AAT3681AIJS-4.2-4-T1 is a battery charger integrated circuit capable of charging 2-cell Li-Ion or Li-Polymer batteries. It optimizes the charging of the battery while protecting the battery from overcharging and short-circuits, maintaining the battery in a safe operating temperature range. The integrated circuit is able to adjust the charging current and voltage depending on the battery type and temperature in order to provide efficient power delivery to the battery.The integrated circuit has been released by Diodes Incorporated and is used in a range of applications from smartphones, tablets, power banks, laptops, and other portable devices. It is an advanced charging integrated circuit that can provide current up to 1.2A depending on the battery type being charged.The device uses an internally integrated current-limiting algorithm to intelligently adjust the charging current to the rated maximum value for conditions such as over-temperature, over-current, or over-voltage. It also features a built-in timer to detect over time charging operations and exit the charging cycle to prevent overcharging or damage to the battery.In order to ensure safe charging operations and optimal battery life, the integrated circuit protects the battery against voltage imbalance, out-of-specification batteries, and reverse-polarity.The AAT3681AIJS-4.2-4-T1 is designed with a high-efficiency construction that eliminates the need for external driver components or power transistors, simplifying the design of the charging circuit. The integrated circuit has an effectiveness of up to 95%, increasing the product life and allowing for a longer product life.The AAT3681AIJS-4.2-4-T1 is configured for a 4.2V nominal output, but is also capable of providing up to 4.2V-6V voltage range for enhanced charging performances. It provides fast charging with a low start-up voltage of 2.7V, enabling it to charge a wide range of lithium ion and lithium polymer batteries.The integrated circuit provides several features for optimized performance, such as under-voltage lockout, over-voltage protection, over-temperature protection, and reverse-polarity protection. It also has thermal cut-off control to prevent overheating, as well as an adjustable charge termination voltage.In conclusion, the AAT3681AIJS-4.2-4-T1 is an advanced and efficient battery charger Integrated Circuit designed to charge the 2-cell Li-Ion or Li-Polymer battery packs. It has been designed with a high-efficiency construction and is capable of providing up to 1.2A regulated charging current and 4.2V-6V voltage range. The integrated circuit also provides advanced charging protection against voltage imbalance, out-of-specification batteries, over-temperature, over-current, over-voltage, and reverse-polarity.

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