S-8254AAJFT-TB-U

Battery Management Overview

The S-8254AAJFT-TB-U is a battery protection IC designed for 3-series or 4-series lithium-ion and lithium-polymer rechargeable batteries. It integrates high-accuracy voltage detectors and delay circuits to prevent overcharge, overdischarge, and overcurrent conditions. The device operates within a power supply voltage range of 2 V to 24 V and utilizes a TSSOP-16 surface-mount package. Key electrical parameters include an overcharge detection voltage of 4.300 V with ±25 mV accuracy and an overcharge release voltage of 4.200 V with ±50 mV accuracy. Overdischarge detection is set at 2.40 V (±80 mV) with a release voltage of 3.00 V (±100 mV). Overcurrent protection features three levels: Level 1 at 0.30 V (±25 mV), Level 2 at 0.5 V (±100 mV), and Level 3 based on VC1-1.2 V.

Battery Management Feature Summary

• Provides high-accuracy voltage detection for individual cells in 3-series or 4-series battery packs to ensure precise monitoring of charge and discharge states.
• Implements a three-level overcurrent protection mechanism to handle varying fault intensities, ranging from minor overcurrents to severe short circuits.
• Utilizes the SEL pin to switch between protection modes for 3-cell and 4-cell configurations, offering flexibility in pack design.

Battery Management Applications

• Protection circuits for 3-series or 4-series lithium-ion battery packs
• Protection circuits for 3-series or 4-series lithium-polymer battery packs
• Portable electronic devices requiring reliable battery management

Battery Management Procurement Notes

Verify the specific suffix codes against the official ABLIC datasheet to confirm exact threshold voltages and package variations. Ensure compatibility with the target battery chemistry and cell count configuration before procurement. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Confirm RoHS compliance status if required by the end product specifications.

Battery Management Selection Notes

Select this component when designing protection systems for 3S or 4S lithium-based battery architectures. The fixed detection thresholds require careful matching with the specific battery cell characteristics to prevent premature triggering or inadequate protection. Consider the external MOSFET selection based on the current sensing resistor values defined by the IC's overcurrent thresholds. Evaluate the thermal performance of the TSSOP-16 package relative to the expected operating environment.

Battery Management Part Context

The S-8254 series comprises protection ICs for multi-cell lithium-ion and lithium-polymer batteries. This specific model belongs to the AAJFT variant, characterized by its particular voltage detection settings. The series is engineered to enhance safety by integrating detection logic directly into a compact surface-mount package, reducing the need for complex external circuitry.

Battery Management Replacement Considerations

Direct replacements must match the 3/4-cell protection function, TSSOP-16 package, and compatible voltage/current thresholds. Verify that any substitute IC supports the same SEL pin functionality for cell count switching. Consult ABLIC documentation for updated series alternatives if the exact part is discontinued.

Battery Management FAQ

What is the overcharge detection voltage for the S-8254AAJFT-TB-U?

The overcharge detection voltage is 4.300 V with an accuracy of ±25 mV.

How does the IC handle overcurrent conditions?

It employs a three-level overcurrent protection system: Level 1 detects currents corresponding to 0.30 V, Level 2 detects 0.5 V, and Level 3 provides protection for severe faults based on the VC1 pin voltage.

Can this IC be used for both 3-cell and 4-cell packs?

Yes, the IC supports both 3-series and 4-series configurations through the use of the SEL pin for switching.