BQ2031SN-A5

Battery Chargers Overview

The BQ2031SN-A5 is a monolithic CMOS integrated circuit designed as a switch-mode charge controller for lead-acid batteries. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an output current of 2 A. The device utilizes a 16-pin NSOIC package with surface-mount installation capabilities. It functions across a temperature range of -20°C to +70°C, consuming approximately 2 mA of operating power. This component integrates thermal monitoring and fault protection mechanisms to manage the charging cycle efficiently.

Battery Chargers Feature Summary

• Integrates thermal monitoring throughout the charge cycle to ensure safe operation
• Supports configurable LED driver outputs for displaying charge status
• Includes automatic qualification testing before initiating fast charging
• Manages charge states including bulk, absorption, and float phases

Battery Chargers Applications

• Switch-mode lead-acid battery charging systems
• Uninterruptible Power Supply (UPS) units
• Solar energy storage controllers
• Telecommunications backup power systems

Battery Chargers Procurement Notes

Verify the specific suffix 'A5' to confirm the intended accuracy and feature set, as variations exist within the BQ2031 family. Ensure the selected package matches the PCB footprint requirements, typically NSOIC-16 for this variant. Confirm RoHS compliance status if environmental regulations apply to the final assembly. Cross-reference the datasheet revision to ensure compatibility with existing design documentation and application notes.

Battery Chargers Selection Notes

Select this component when designing a cost-effective, single-cell lead-acid charger requiring integrated control logic. It is suitable for applications where space constraints favor a monolithic solution over discrete components. Consider the 16-pin SOIC package for standard surface-mount assembly processes. Evaluate the need for external MOSFETs and inductors, as the BQ2031 controls these external power stages rather than integrating them directly.

Battery Chargers Part Context

The BQ2031 belongs to Texas Instruments' dedicated battery management portfolio, specifically targeting lead-acid chemistry. It serves as a core controller in switch-mode power architectures, distinguishing itself from linear regulators by offering higher efficiency. The device simplifies system design by combining timing, voltage regulation, and thermal protection into a single chip, reducing the bill of materials for industrial and consumer battery chargers.

Battery Chargers Replacement Considerations

BQ2031SN-A5G4 is listed as a discontinued version with BQ2031SN-A5 recommended as the manufacturer replacement. BQ24650RVAR is identified as a similar alternative product.