BQ28Z620DRZR

Battery Management Overview

The BQ28Z620DRZR is a highly integrated gas gauge and protection solution for 1-series to 2-series cell lithium-ion battery packs. It features a flash-programmable custom RISC CPU, SHA-1 authentication responder, and high-side N-channel FET drivers. The device supports autonomous charger control via Master Mode I2C broadcasts, eliminating host controller software overhead. Key electrical parameters include a 2.2 V to 26 V operating supply voltage range, 250 µA operating supply current, and a maximum operating temperature of +85 °C with a minimum of -40 °C. It utilizes a compact 12-pin VSON package (DRZ) and includes an analog front-end with two independent ADCs for simultaneous current and voltage sampling.

Battery Management Feature Summary

• Enables autonomous charge control through Master Mode I2C broadcasts of charging current and voltage information.
• Integrates a high-accuracy coulomb counter with input offset error less than 1 µV typical value.
• Supports internal bypass cell balancing to optimize battery health and status.
• Provides high-side protection N-channel FET drive capability that maintains serial bus communication during fault conditions.

Battery Management Applications

• Tablet computing
• Portable and wearable health devices
• Wireless Bluetooth speakers

Battery Management Procurement Notes

Verify the specific ordering suffix DRZR against the manufacturer's official datasheet to confirm the exact package type and tape/reel specifications. Ensure compatibility with the required I2C logic levels and check for any recent product change notifications regarding component revisions or manufacturing site updates before finalizing procurement plans.

Battery Management Selection Notes

Select this component when designing systems requiring precise state-of-charge monitoring for single or dual-cell lithium-based batteries. The integrated Impedance Track algorithm and SHA-1 security features make it suitable for applications demanding high accuracy and data integrity. Consider the 12-pin VSON footprint constraints and the necessity for external current sense resistors compatible with the low-offset analog front-end.

Battery Management Part Context

This device belongs to the BQ28Z620 series of battery management solutions from Texas Instruments. It is designed as a complete pack-based solution combining fuel gauging, protection, and authentication functions. The part number indicates the specific surface-mount packaging variant intended for automated assembly processes in consumer electronics manufacturing.

Battery Management Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify cross-compatibility with existing firmware and hardware designs if considering alternative gas gauge components within the same product family.