Texas Instruments BQ25756EEVM

Overview

BQ25756EEVM from Texas Instruments is a fully assembled evaluation module for the BQ25756E synchronous buck-boost battery charge controller IC, supporting 4.2 V–36 V input and up to 36 V output with 10 A max charge current, bi-directional operation, and MPPT for solar charging. It enables rapid validation of USB PD Extended Power Range (EPR), multi-cell Li-ion/LiFePO₄ battery charging, and high-voltage portable power systems.

For engineers reviewing the BQ25756EEVM datasheet, BQ25756EEVM hardware design files, BQ25756EEVM safety guidelines, or BQ25756EEVM interface setup with EV2400/USB2ANY, this EVM provides complete test infrastructure-including jumper-configurable cell count, I_IN/I_OUT limits, switching frequency, and thermal monitoring-within a compact 112 mm × 84 mm, 6-layer PCB layout.

Technical Context

The BQ25756EEVM implements the full functional stack of the BQ25756E IC: wide-range buck-boost DC/DC conversion with integrated NFET drivers, hardware-programmable CC/CV regulation via resistor networks on IIN, IOUT, FSW_SYNC, and FB pins, and dual-mode control (standalone resistor-programmed or I²C-hosted). It supports forward charging, reverse power-up from battery, and solar MPPT tracking.

Designed as a TI High Voltage Evaluation Module (HV EVM), it operates at hazardous voltage levels up to 36 V without electrical isolation; all terminals are considered live when energized. Safety-critical features include adjustable input/output overvoltage/undervoltage protection, output overcurrent protection, and mandatory use of isolated test equipment per TI HV EVM guidelines.

Key Specifications

Availability

BQ25756EEVM is available at Aetrix Electronics and suitable for USB PD EPR development, portable power station validation, and cordless power tool battery management system prototyping requiring stable component supply and full reference design access.

Supply support for BQ25756EEVM includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of leadership in battery management ICs and evaluation platforms.

The BQ25756EEVM belongs to TI's Battery Management EVM product line, engineered specifically to accelerate development of high-efficiency, high-voltage, bi-directional battery charging systems for e-mobility, solar energy harvesting, and next-generation USB power delivery applications.

FAQ

What is the primary function of the BQ25756EEVM?

The BQ25756EEVM is an evaluation module for the BQ25756E buck-boost battery charge controller IC. It enables engineers to validate full-system performance-including CC/CV charging, bi-directional power flow, solar MPPT, and USB PD EPR compliance-using hardware jumpers and I²C-based configuration tools like TI Charger GUI or Battery Management Studio. The BQ25756EEVM itself is not a production component but a lab-ready test platform.

Does the BQ25756EEVM include isolation for its digital interfaces?

No, the BQ25756EEVM does not provide electrical isolation for its I²C communication ports (J4 and J5). TI explicitly recommends using digital isolators with an isolation boundary when connecting the BQ25756EEVM to a PC via EV2400 or USB2ANY. Failure to isolate may expose users to hazardous voltages and compromise measurement integrity.

What safety precautions apply when operating the BQ25756EEVM?

The BQ25756EEVM is classified as a TI High Voltage Evaluation Module with reduced clearance and creepage. All terminals become hazardous live above 50 V. Users must de-energize before probing, use insulated tools, wear PPE (e.g., safety glasses), and operate only in controlled lab environments with qualified personnel present. The board must never be used in production or consumer-facing applications.

Which battery chemistries and configurations can be evaluated using the BQ25756EEVM?

The BQ25756EEVM supports 2–7S Li-ion and 2–9S LiFePO₄ battery packs via jumper-selectable feedback resistors (JP1–JP2) and hardware-programmable output voltage. Default configuration targets 7S Li-ion (29.4 V nominal); alternate cell counts require reconfiguration of JP2 and associated FB network components per the BQ25756EEVM User's Guide.

What external equipment is required to evaluate the BQ25756EEVM?

To evaluate the BQ25756EEVM, you need: (1) a 30 V/8 A power supply for input, (2) a four-quadrant or electronic load for battery emulation, (3) voltage/current meters, (4) an EV2400 or USB2ANY interface device, and (5) a Windows PC running TI Charger GUI or Battery Management Studio. The BQ25756EEVM itself does not include any interface hardware or isolation components.