BQ2031PN-A5

Overview

The BQ2031PN-A5 is a monolithic CMOS integrated circuit designed as a switch-mode charge controller for single-cell lead-acid batteries. It operates from a 4.5 V to 5.5 V supply and supports up to 2 A output current. The device utilizes a two-stage constant-current charging algorithm with thermal monitoring and fault protection, including over-temperature and over-voltage safeguards. Packaged in a 16-pin PDIP format, it functions within a temperature range of -20°C to +70°C.

Feature Summary

• Implements a two-stage constant-current charging profile optimized for lead-acid battery chemistry.
• Integrates continuous thermal monitoring that suspends charging if temperature limits are exceeded.
• Provides programmable LED driver outputs for visual indication of charge status and fault conditions.

Applications

• Lead-acid battery management systems
• Switch-mode charger designs
• Battery-powered equipment requiring robust charge control

Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm package type and electrical characteristics. Ensure compatibility with the target lead-acid battery voltage and current requirements before integration. Confirm availability status as older components may have limited production runs or require substitution verification.

Selection Notes

Select this component for applications requiring a dedicated, low-component-count solution for single-cell lead-acid charging. It is suitable for designs where thermal protection and programmable status indication are critical. Compare against newer PMICs if higher efficiency or multi-cell support is required.

Part Context

The BQ2031 belongs to the BQ2031 series of battery charge management ICs from Texas Instruments. This family focuses on simplified control for lead-acid chemistries, offering an alternative to discrete transistor-based charging circuits by integrating timing, sensing, and drive logic into a single chip.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.