BQ29441DRBR

Battery Management Overview

The BQ29441DRBR is a secondary voltage protection circuit designed for two, three, or four-cell lithium-ion battery packs. It operates within a supply voltage range of 4 V to 25 V and features a fixed overvoltage detection threshold of 4.40 V. The device monitors cell voltages to prevent damage from excessive charging conditions. It utilizes an 8-SON package with dimensions of 3 mm in length. The component supports surface-mount installation and functions reliably across an operating temperature range of -40 °C to +85 °C.

Battery Management Feature Summary

• Provides secondary-level overvoltage protection for multi-cell lithium-ion battery configurations
• Monitors individual cell voltages to ensure safe operation limits are maintained
• Operates with low quiescent current to minimize power consumption during standby

Battery Management Applications

• Portable electronic devices requiring multi-cell battery safety
• Power tool battery packs
• Medical equipment battery systems

Battery Management Procurement Notes

Verify the specific suffix DRBR corresponds to the 8-SON package and tape-and-reel packaging format. Confirm RoHS compliance status and lead times directly with Texas Instruments or authorized distributors. Ensure the fixed 4.40 V threshold meets your system requirements as it is not adjustable.

Battery Management Selection Notes

Select this component when fixed overvoltage protection at 4.40 V is required for 2S to 4S Li-Ion batteries. Consider the 8-SON package size for space-constrained designs. Verify that the non-adjustable threshold aligns with the maximum allowable cell voltage for the specific battery chemistry used in the application.

Battery Management Part Context

This part belongs to the BQ2944x series of second-level battery protection ICs from Texas Instruments. These devices complement primary protection circuits by providing independent monitoring. The series includes variants with different thresholds and packages, such as the BQ29440 and BQ29449, offering flexibility for various battery pack architectures.

Battery Management Replacement Considerations

Check datasheets for BQ29440 or BQ29449 if alternative thresholds or packages are needed. Ensure substitute parts maintain the same 4V to 25V operating range and 8-SON footprint compatibility.