BQ2031SN-A5TRG4

Battery Chargers Overview

The BQ2031SN-A5TRG4 is a lead-acid fast-charge integrated circuit manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a maximum charging current of 2 A. The device utilizes a 16-SOIC surface-mount package and functions across an operating temperature range of -20°C to +70°C. Designed for single-cell lead-acid batteries, it implements switchmode charge management with programmable current, timer, and voltage parameters.

Battery Chargers Feature Summary

• Integrates thermal monitoring that suspends timers and enters Charge Pending state when temperatures exceed operational limits.
• Performs battery qualification through two-stage testing, regulating voltage and observing current to detect open cells before initiating bulk charging.
• Provides configurable charge status annunciation via three LED driver outputs selectable through the DSEL pin configuration.

Battery Chargers Applications

• Lead-acid battery charging systems requiring dedicated switchmode control
• Battery management circuits utilizing microcontroller integration for monitoring
• Applications necessitating thermal protection during the charge cycle

Battery Chargers Procurement Notes

Verify component authenticity against official Texas Instruments documentation due to potential availability variations. Confirm package integrity and pin alignment for the 16-SOIC form factor prior to assembly. Ensure design compatibility with the specified 4.5 V to 5.5 V supply range and -20°C to +70°C operating environment. Cross-reference datasheet revisions to validate functional specifications.

Battery Chargers Selection Notes

Select this component for applications requiring dedicated lead-acid charge management with integrated thermal and fault protection. The device supports programmable charging parameters suitable for single-cell configurations. Evaluate the 16-SOIC package constraints against board space requirements. Verify that the 2 A current capability aligns with target battery specifications and thermal dissipation capabilities.

Battery Chargers Part Context

This part belongs to the BQ2031 series of battery chargers designed specifically for lead-acid chemistries. The suffix indicates tape-and-reel packaging for automated assembly processes. The device integrates control logic with power switching capabilities to optimize charge cycles while protecting battery health through continuous monitoring and fault detection mechanisms.

Battery Chargers Replacement Considerations

BQ2031SN-A5 is listed as a manufacturer-recommended alternative. Verify electrical and mechanical compatibility before substitution. Note that BQ24650RVAR is identified as a similar product but may differ in specific interface or control characteristics.

Battery Chargers FAQ

How does the BQ2031 handle out-of-range temperature conditions?

The device enters a Charge Pending state and suspends all timers without resetting them. Charging resumes from the detected point once the temperature returns to the valid range.

What occurs if the battery qualification test fails?

If the first test detects insufficient current rise, indicating a potential open cell, the device enters a Fault state. It remains in this state until VCC is cycled or battery insertion is detected to restart the qualification process.