Texas Instruments BQ25640EVM Evaluation Module

Introduction

The Texas Instruments BQ25640EVM is an evaluation module designed to help engineers assess the performance and features of the BQ25640 single-cell battery charger IC. It provides a ready-to-use platform for testing switch-mode charging, USB Type-C input detection, I2C control, and NVDC power-path management.

Part Description

The BQ25640EVM is built around the Texas Instruments BQ25640, a highly integrated buck battery charger intended for single-cell lithium-ion and lithium-polymer battery systems. The module supports input voltages up to 18 V and charging currents up to 5 A, allowing it to evaluate charging behavior across a broad range of portable and embedded power applications.

Its NVDC power-path architecture allows the system load to be powered while the battery is charging. This feature can improve overall product behavior by reducing interruptions during charging, battery replacement, or changes in input power availability.

The module also includes I2C communication capability for configuring charger parameters and monitoring operational status. USB Type-C detection support makes it especially useful for evaluating modern USB-powered equipment and Type-C charging designs.

Key features include:

• Evaluation platform for the TI BQ25640 battery charger
• Single-cell lithium-ion and lithium-polymer battery charging support
• Switch-mode buck charging topology
• Up to 18 V input voltage capability
• Up to 5 A maximum charging current
• NVDC power-path management
• I2C configuration and status monitoring
• USB Type-C input detection
• Suitable for bench testing, firmware development, and power-system validation

Applications

Potential applications for the BQ25640EVM include:

• USB Type-C battery charging evaluation
• Single-cell lithium-ion battery charger development
• Portable electronics power-system prototyping
• Rechargeable battery pack testing
• Embedded-system power-path testing
• Fast-charging design evaluation
• Battery-powered IoT device development
• Handheld instrument charger design
• Industrial portable equipment prototypes
• Power-management firmware development

Industries

The BQ25640EVM may be useful in several industries, including:

• Consumer electronics
• Industrial automation
• Internet of Things
• Medical and healthcare devices
• Test and measurement
• Telecommunications
• Smart home products
• Wearable technology
• Robotics
• Education and engineering research

Usage Ideas

1. USB Type-C Portable Device Charger
   Evaluate a USB Type-C powered charging system for a handheld device using a single-cell lithium-ion battery.

2. I2C Battery Management Prototype
   Connect the evaluation module to a microcontroller and create firmware that configures charge current, monitors charging status, and detects fault conditions over I2C.

3. NVDC Power-Path Demonstrator
   Build a demonstration setup showing how a device can operate from external power while simultaneously charging its battery.

Conclusion

The Texas Instruments BQ25640EVM is a practical development platform for evaluating the BQ25640 single-cell switch-mode battery charger. With high-current charging capability, USB Type-C detection, I2C control, and NVDC power-path management, it supports the development of efficient rechargeable power systems for portable, embedded, and connected electronic products.