BQ4050

• 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)

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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.