BQ78350DBTR-R1A

Battery Management Overview

The BQ78350DBTR-R1A is a companion CEDV fuel gauge and battery management controller from Texas Instruments, designed for use with bq769x0 series analog front-end devices. It supports 3 to 15-cell lithium-ion and lithium iron phosphate (LiFePO4) battery configurations. The device features a TSSOP-30 package and operates within a supply voltage range of 2.5 V to 5.5 V. It supports battery capacities up to 320,000 mAh and charging currents up to 320 A when paired with compatible AFEs. The operating temperature range spans from -40°C to +85°C, with a typical quiescent current of 650 µA.

Battery Management Feature Summary

• Implements Compensation End-of-Discharge Voltage (CEDV) fuel gauging algorithm for accurate state-of-charge estimation.
• Provides comprehensive health monitoring and data logging capabilities via non-volatile memory storage.
• Supports SMBus 1.1 communication interface for host system integration and diagnostic access.
• Enables configurable LED or LCD display driving for visual status indication.

Battery Management Applications

• Light electric vehicles including e-bikes and e-scooters
• Electric gardening tools and power equipment
• Uninterruptible power supply (UPS) systems

Battery Management Procurement Notes

Verify the specific suffix R1A against the latest manufacturer datasheet to confirm pinout and feature compatibility. Check for Not Recommended for New Design (NRND) status in official documentation before finalizing procurement plans. Ensure the ordering part number matches the required tape-and-reel packaging configuration for automated assembly processes.

Battery Management Selection Notes

Select this component when integrating with bq76920, bq76930, or bq76940 analog front-ends for multi-cell battery packs. Consider the TSSOP-30 package constraints for PCB layout. Evaluate the need for SHA-1 authentication if security requirements are critical. Confirm that the target application supports the specified SMBus protocol and voltage levels for reliable communication.

Battery Management Part Context

This part belongs to the BQ78350-R1 family of fuel gauges. It serves as the intelligent controller for battery management systems, working in tandem with Texas Instruments' bq769x0 series protection devices. The family is optimized for high-capacity applications requiring precise state-of-health tracking and robust communication interfaces.

Battery Management Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult the manufacturer's official replacement guide or contact technical support for validated alternatives.