S-8209BAY-T8T1U

Battery Management Overview

The S-8209BAY-T8T1U is a battery protection IC designed for lithium-ion and lithium-polymer batteries, manufactured by ABLIC Inc. It integrates cell balancing functionality to maintain voltage consistency across series-connected cells. The device operates within a supply voltage range of 1.5 V to 8 V and supports output voltages up to 24 V. It is housed in an 8-TSSOP surface-mount package with a width of 4.40 mm. The component functions reliably across a temperature range of -40°C to +85°C.

Battery Management Feature Summary

• Integrates active cell balancing to equalize voltage differences between individual battery cells during charging cycles.
• Provides comprehensive protection mechanisms for lithium-ion and lithium-polymer battery packs against operational faults.
• Supports multi-cell series configurations with high maximum output voltage capability.

Battery Management Applications

• Protection circuits for portable electronic devices utilizing multi-cell lithium battery packs
• Battery management systems requiring cell voltage equalization in consumer electronics
• Power management modules for cordless tools and medical equipment

Battery Management Procurement Notes

Verify the specific suffix T8T1U corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the 8-TSSOP footprint matches the target PCB layout dimensions. Ensure compatibility with the system's operating voltage range before integration into the final design.

Battery Management Selection Notes

Select this component when active cell balancing is required alongside standard overcharge and overdischarge protection. It is suitable for applications where maintaining uniform cell health extends overall battery pack lifespan. Consider the thermal performance limits and package size constraints relative to the available board space.

Battery Management Part Context

This part belongs to the S-8209A/B series of battery protection ICs from ABLIC. The series is characterized by low standby current consumption and integrated MOSFET control capabilities. It serves as a specialized power management solution for single-cell or small series battery applications in compact form factors.

Battery Management Replacement Considerations

Direct substitutes include other ABLIC models within the S-8209 family, such as the S-8209ABB-T8T1U, which shares similar protection and balancing features. Verify pinout compatibility and electrical specifications before swapping components in existing designs.

Battery Management FAQ

Does the S-8209BAY-T8T1U support passive or active cell balancing?

The datasheet description identifies it as a battery protection IC with a cell-balance function, typically implying active balancing to transfer charge between cells rather than dissipating energy.

What is the maximum operating supply voltage for this IC?

The device is rated for a working power supply voltage range extending up to 8 V, allowing it to manage battery packs with multiple series-connected cells.