BQ29440DRBT

Battery Chargers Overview

The BQ29440DRBT is a secondary over-voltage protection IC designed for 2- to 4-cell series Lithium-ion or Lithium-polymer battery stacks. Manufactured by Texas Instruments, it monitors individual cell voltages and triggers protection when any cell exceeds the specified threshold of 4.35V. The device operates within a supply voltage range of 4V to 25V and features a low operating current of 2µA. It is housed in an 8-pin VSON (DRB) package measuring 3x3x0.88mm, suitable for surface-mount installation across a temperature range of -40°C to +85°C.

Battery Chargers Feature Summary

• Monitors individual cell voltages in series-connected Li-ion or Li-polymer battery packs
• Triggers protection mechanism upon detection of overvoltage conditions exceeding the 4.35V threshold
• Designed for secondary-level protection applications in multi-cell battery systems

Battery Chargers Applications

• Secondary over-voltage protection for 2-series Li-ion battery stacks
• Secondary over-voltage protection for 3-series Li-ion battery stacks
• Secondary over-voltage protection for 4-series Li-ion battery stacks
• Protection circuits for 2- to 4-series Li-polymer battery configurations

Battery Chargers Procurement Notes

Verify that the component is sourced from authorized distributors to ensure authenticity, as Benchmarq listings may indicate third-party distribution channels. Confirm the specific suffix DRBT corresponds to the 8-pin VSON package with the 4.35V threshold. Check RoHS compliance status and humidity sensitivity等级 (MSL 2) requirements prior to assembly. Ensure the supplier provides valid traceability documentation for this Texas Instruments manufactured part.

Battery Chargers Selection Notes

Select this component when secondary over-voltage protection is required for 2- to 4-cell series battery architectures. The fixed 4.35V threshold suits standard Li-ion cells where precise external programming is not needed. Consider the low 2µA quiescent current for energy-sensitive designs. The compact 3x3mm VSON package is appropriate for space-constrained PCB layouts. Verify compatibility with the system's operating voltage range of 4V to 25V.

Battery Chargers Part Context

This part belongs to the BQ2944x family of battery protection ICs from Texas Instruments. While marketed under Benchmarq in some channels, the manufacturer is Texas Instruments. The BQ29440 variant specifically addresses secondary protection needs for multi-cell lithium-based batteries, distinguishing itself from primary protection controllers by focusing on overvoltage monitoring rather than charge/discharge control.

Battery Chargers Replacement Considerations

The BQ29441DRBT offers a similar function but with a different overvoltage threshold. The BQ29442DRBT provides protection with a 4.45V threshold. The BQ29449DRBT features a 4.30V threshold. All variants share the same 8-pin VSON package and basic architecture, allowing for potential substitution if threshold adjustments align with specific cell requirements.