BQ4050RSMR Power Path Management IC Battery Management 1S - 4S CEDV GG with LED Support

1 Features

• High-Side Protection N-CH FET Drive Enables Serial Bus Communication During Fault Conditions

• Cell Balancing with Internal Bypass Optimizes Battery Health

• Diagnostic Lifetime Data Monitor and Black Box Recorder for Failure Analysis

• Full Array of Programmable Protection Features: Voltage, Current, Temperature

• JEITA Charge Algorithms Support Smart Charging

• Analog Front End with Two Independent ADCs

  • – Simultaneous Current and Voltage Sampling

  • – High-Accuracy Coulomb Counter with Input

    Offset Error < 1 μV (Typical)

• Supports Battery Trip Point (BTP) Function for

  Windows® Integration

• LED Display for State of Charge and Battery Status Indication

• 100-KHz SMBus v1.1 Communications Interface for Programming and Data Access with Alternate 400-KHz Mode

• SHA-1 Authentication Responder for Increased Battery Pack Security

• Compact 32-Pin VQFN Package (RSM)

2 Applications

• Notebooks

• Medical and Test Equipment

• Portable Instrumentation

• Cordless Vacuum Cleaners and Vacuum Robots

3 Description

The Texas Instruments bq4050 device, incorporating Compensated End-of-Discharge Voltage (CEDV) technology, is a highly integrated, accurate, 1-series to 4-series cell gas gauge and protection solution, enabling autonomous charger control and cell balancing.

The bq4050 device provides a fully integrated pack- based solution with a flash programmable custom reduced instruction-set CPU (RISC), safety protection, and authentication for Li-Ion and Li- Polymer battery packs.

The bq4050 gas gauge communicates via an SMBus- compatible interface and combines an ultra-low power, high-speed TI bqBMP processor, high- accuracy analog measurement capabilities, integrated flash memory, an array of peripheral and communication ports, an N-CH FET drive, and a SHA-1 Authentication transform responder into a complete, high-performance battery management solution.

Device Information