BQ2057WTS SMD IC Li-Ion, Li-Pol From TEXAS INSTRUMENTS

Li-Ion / Li-Polymer Battery Charging Controller IC – Smart Multi-Cell Charger Solution
This intelligent battery charging controller IC is designed for single-cell and dual-cell Li-Ion or Li-Polymer battery packs used in portable electronics, embedded systems, power banks, robotics, and industrial battery-powered devices. Featuring integrated voltage and current regulation, low dropout operation, automatic recharge capability, and advanced battery conditioning functions, the IC provides safe, efficient, and optimized charging performance with minimal external components.

Why it’s a System Essential:
• Supports Single & Dual Cell Packs: Compatible with 4.1V/4.2V single-cell and 8.2V/8.4V dual-cell Li-Ion or Li-Polymer batteries.
• Minimal External Components Required: Simplifies PCB design and reduces overall system cost.
• Low Dropout Voltage: Only 0.3V dropout minimizes heat generation and improves efficiency.
• High Charging Accuracy: Better than ±1% voltage regulation ensures safe and reliable charging.
• AutoComp™ Technology: Dynamically compensates battery internal impedance to reduce charging time.
• Integrated Cell Conditioning: Safely revives deeply discharged cells while minimizing thermal stress.
• Automatic Recharge Feature: Automatically restarts charging when battery voltage drops.

Technical Features:
• Battery Compatibility:
 • Single-Cell Li-Ion / Li-Polymer Packs (4.1V / 4.2V)
 • Dual-Cell Li-Ion / Li-Polymer Packs (8.2V / 8.4V)

Charging Performance:
• Dropout Voltage: 0.3V
• Voltage Regulation Accuracy: Better than ±1%
• Integrated Voltage and Current Regulation
• Programmable Charge Current

Current Sensing Support:
• High-Side Current Sensing
• Low-Side Current Sensing

Advanced Battery Management Features:
• AutoComp™ Dynamic Battery Impedance Compensation
• Integrated Cell Conditioning for Deeply Discharged Cells
• Reduced Heat Dissipation During Initial Charging Stage
• Automatic Battery Recharge Function
• Optional Cell Temperature Monitoring Before and During Charging

Status & Interface Features:
• Charge Status Output Support
• Single LED Interface
• Dual LED Interface
• Host Processor Interface Support

Features:
• Smart Li-Ion/Li-Poly charging control
• Efficient low-dropout charging operation
• Advanced battery conditioning support
• Reduced charging time optimization
• Integrated thermal and safety-oriented design
• Compact low-component-count implementation

Applications:
• Li-Ion battery charging systems
• Portable electronics
• Power banks and battery packs
• Embedded battery-powered devices
• Robotics and automation systems
• Industrial battery management
• Medical portable devices
• Consumer electronics
• DIY battery charging projects

Best For:
Ideal for students, hobbyists, makers, engineers, and power electronics developers working on battery chargers, portable electronics, embedded power systems, robotics, IoT devices, and Li-Ion/Li-Polymer battery management applications requiring intelligent and efficient charging control.