BQ40Z50RSMT

Battery Management Overview

The BQ40Z50RSMT is a battery pack manager from Texas Instruments designed for 1 to 4 series Lithium-ion and Lithium Polymer battery packs. It integrates gas gauging and protection functions for autonomous operation. The device operates within a supply voltage range of 2.2 V to 26 V, with an output voltage capability of 26 V and an output current of 22.5 mA. It features a low operating supply current of 336 uA. The component is housed in a VQFN-32 package suitable for SMD/SMT installation. It supports an operating temperature range from -40 °C to +85 °C.

Battery Management Feature Summary

• Integrates Impedance Track fuel gauging and protection logic for complete autonomy
• Supports communication via I2C interface for system integration
• Includes programmable overcurrent and short-circuit protection thresholds

Battery Management Applications

• Laptop computer battery packs
• Power tool battery packs
• Medical equipment power supplies
• Portable instrumentation battery systems

Battery Management Procurement Notes

Verify the specific suffix (e.g., R1 or R2) against the Bill of Materials, as these denote distinct manufacturing revisions. Confirm RoHS compliance status directly from the manufacturer's datasheet before procurement. Ensure the VQFN-32 footprint matches the PCB design guidelines provided in the official documentation to prevent assembly errors.

Battery Management Selection Notes

Select this component when precise state-of-charge estimation is required for 1S to 4S Li-Ion configurations. The integrated Impedance Track algorithm reduces the need for external calibration compared to basic coulomb counters. Evaluate the thermal performance requirements against the specified -40 °C to +85 °C operating range for the target application environment.

Battery Management Part Context

This part belongs to the BQ40Z50-R family of battery management ICs. It serves as a high-integration solution combining fuel gauging and protection in a single chip. The RSMT designation indicates the specific tape-and-reel packaging format used for surface-mount assembly processes.

Battery Management Replacement Considerations

The BQ40Z50RSMT-R2 is a verified alternative revision within the same product family. Verify pin compatibility and register mapping consistency between revisions before substitution.