AD7280ABSTZ

Series:	--
Packaging:	Tray
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Function:	Battery Monitor
Battery Chemistry:	Lithium-Ion
Number of Cells:	1 ~ 6
Fault Protection:	Over/Under Voltage
Interface:	SPI
Operating Temperature:	-40°C ~ 105°C (TA)
Package / Case:	48-LQFP
Supplier Device Package:	48-LQFP (7x7)
Base Part Number:	AD7280

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AD7280ABSTZ Application Field and Working Principle

The AD7280ABSTZ is a battery management IC used for battery packs and supercapacitors in portable applications. It integrates three highly integrated features, digitally tunable voltage and current monitoring, over temperature protection and charge/discharge cell balancing. This integrated solution will provide a very reliable battery management solution and improved system robustness in systems that require real-time power information in demanding power supply conditions.

AD7280ABSTZ Application Field

The AD7280ABSTZ is applicable to battery packs and supercapacitors in portable applications, such as consumer electronics. It has two voltage monitors and two current monitors that support several digital charge/discharge scenarios. Furthermore, the voltage and current monitoring thresholds can be tuned by writing in the digital configuration settings programmed during design. The over temperature protection feature provides a system level shutdown for single cells that exceed the programmed temperature. The cell balancing feature balances voltages of cells in battery packs and supercapacitors are utilized to distribute charge when cells have different capacities. This can prevent overcharging of individual cells, and greatly improve the overall battery pack lifetime.

AD7280ABSTZ Working Principle

The AD7280ABSTZ works by integrating three distinct features: voltage and current monitoring, over temperature protection, and charge/discharge cell balancing. The voltage and current monitoring feature allow one to measure the voltage and current of two distinct battery or supercapacitor cells. The real-time monitoring allows user to know how much power the cells are putting out and receiving, allowing one to optimize battery performance. The over temperature protection feature will shut down the system if one of the cells is operating at a temperature that exceeds the user-defined threshold. This prevents failure of the cell due to excessive heat. The cell balancing feature redistributes charge among cells when differences exist in cell capacities to prevent overcharging of individual cells and optimize the overall performance of the battery.In conclusion, the AD7280ABSTZ is designed to provide reliable real-time monitoring and protection of battery pack and supercapacitor cells in portable applications. This integrated solution allows users to be aware of the exact state of the power source being utilized, optimizes performance, and prevents any failure due to overcharging, high temperatures, or unbalanced cells.

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