BQ29413DCTR

Battery Management Overview

The BQ29413DCTR is a secondary over-voltage protection device for 2-, 3-, or 4-cell Lithium-ion batteries. It operates within a supply voltage range of 4 V to 25 V and features an output voltage threshold of 4.6 V. The component functions as a second-level protection mechanism, disconnecting the battery from the load upon detecting over-voltage conditions. It is housed in an SM-8 package and supports surface mount installation. The device is rated for operation between -40°C and +110°C.

Battery Management Feature Summary

• Provides secondary over-voltage protection for multi-cell lithium-ion battery packs
• Automatically disconnects the battery from the load when voltage exceeds the threshold
• Designed for use as a second-level protection circuit alongside primary protection

Battery Management Applications

• Secondary protection circuits for portable electronic devices
• Battery management systems in power tools
• Uninterruptible power supplies (UPS) with lithium-ion cells

Battery Management Procurement Notes

Verify the specific datasheet version and RoHS compliance status directly with Texas Instruments or authorized distributors before procurement. Confirm that the SM-8 package dimensions match your PCB footprint requirements. Ensure the application circuit design accounts for the 4.6 V threshold to prevent premature disconnection during normal charging cycles.

Battery Management Selection Notes

Select this component when a dedicated secondary over-voltage protection stage is required for 2 to 4 series-connected lithium-ion cells. It is suitable for applications needing a compact solution with a wide operating temperature range. Consider the SM-8 package size and the fixed 4.6 V threshold against alternative parts with different thresholds if system voltage levels vary significantly.

Battery Management Part Context

This part belongs to the BQ2941x family of battery protection ICs from Texas Instruments. These components are designed to provide robust secondary protection for lithium-ion and lithium-polymer battery packs. The family includes variants with different voltage thresholds and cell counts, allowing designers to choose the appropriate protection level for specific battery configurations.

Battery Management Replacement Considerations

Check for BQ29410DCT3R or BQ29415DCTTG4 as potential alternatives, noting differences in voltage thresholds (4.35 V vs 4.6 V). Verify pin compatibility and package type (SM-8) before substitution. Ensure the replacement part meets the same operating temperature and voltage range requirements.