BQ29442DRBT

Battery Management Overview

The BQ29442DRBT is a secondary over-voltage protection device designed for two, three, or four-cell lithium-ion and lithium-polymer battery packs. It features a fixed detection threshold voltage of 4.45V to monitor cell balance. The component operates within a supply voltage range of 4V to 25V and draws a typical operating current of 2µA. It is housed in an 8-pin HVSON package with dimensions of 3mm. The device supports surface mount installation and functions reliably across an industrial temperature range from -40°C to +85°C.

Battery Management Feature Summary

• Provides secondary over-voltage protection for multi-cell Li-ion and Li-Po battery configurations
• Utilizes a fixed 4.45V detection threshold for precise cell monitoring
• Designed for low-power applications with minimal quiescent current consumption

Battery Management Applications

• Secondary protection for 2-4 series connected lithium-ion battery packs
• Cell balancing supervision in portable electronic devices
• Battery management systems requiring fixed threshold over-voltage cutoff

Battery Management Procurement Notes

Verify the specific suffix DRBT corresponds to the 8-SON package and standard commercial grade when sourcing. Confirm RoHS compliance status as per the latest manufacturer documentation. Ensure the fixed 4.45V threshold aligns with your system design requirements, as this parameter is not adjustable. Cross-reference the datasheet revision date to ensure compatibility with current manufacturing standards.

Battery Management Selection Notes

Select this component when a fixed over-voltage threshold is required for secondary protection rather than primary control. It is suitable for designs needing low standby current and compact packaging. Consider the 4.45V limit against maximum cell voltages in your specific chemistry configuration. This part complements primary protection ICs by providing an independent safety layer.

Battery Management Part Context

This device belongs to the BQ2944x family of battery protection ICs from Texas Instruments. It shares functional similarities with parts like the BQ29441 and BQ29449 but differs in its specific voltage threshold settings. The family targets cost-sensitive battery management applications where dedicated secondary protection is necessary to prevent cell damage during charging anomalies.

Battery Management Replacement Considerations

Check BQ29441DRBT and BQ29449DRBT for alternative threshold options within the same package. Verify pinout compatibility before substitution. Ensure the replacement part meets the same thermal and electrical specifications for your application.