STMicroelectronics STEVAL-ISB044V1

Overview

STEVAL-ISB044V1 from STMicroelectronics is a Qi-compliant wireless power transmitter evaluation board based on the STWBC-EP digital controller, implementing WPC Qi v1.2.3 MP-A10 topology with 15 W output capability, FOD (foreign object detection), and triple-path (V/I/f) demodulation. It supports 5–13 V input, half-bridge switching at 110–180 kHz, and real-time monitoring via UART-connected GUI.

For engineers reviewing the STEVAL-ISB044V1 datasheet, STEVAL-ISB044V1 pinout, STEVAL-ISB044V1 application, or STEVAL-ISB044V1 equivalent, this board serves as a complete reference design for Qi-certifiable 15 W transmitter development - including firmware, 2-layer PCB layout, GUI tools, and debug interfaces (UART, SWIM, I²C).

Technical Context

The STEVAL-ISB044V1 implements the Qi MP-A10 specification using the STWBC-EP controller, which integrates boost-stage control, bridge voltage/frequency regulation, and hardware-accelerated symbol detection across three analog paths (voltage, current, frequency). It embeds active presence detection, accurate power control, and robust FOD based on Q-factor measurement via dedicated high-sensitivity ADC inputs.

System-level operation relies on real-time UART communication with the STSW-STWBCGUI software, enabling live parameter tuning (e.g., regulation error, FOD thresholds), firmware patching, and binary dump/restore. The board uses a cost-optimized 2-layer PCB and supports both standard BPP (5 V) and extended EPP (12 V) input modes via USB QC or DC jack.

Key Specifications

Availability

STEVAL-ISB044V1 is available at Aetrix Electronics and suitable for Qi wireless charger development, EPP/BPP transmitter validation, and FOD algorithm testing requiring stable component supply and full toolchain support.

Supply support for STEVAL-ISB044V1 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in microcontrollers, analog ICs, power management, and automotive-grade silicon.

The STEVAL-ISB044V1 belongs to ST's wireless power reference design portfolio, engineered specifically to accelerate Qi-compliant transmitter development with production-ready firmware, GUI tools, and regulatory-aligned hardware architecture.

FAQ

What firmware is preloaded on the STEVAL-ISB044V1?

The board ships with factory-programmed firmware supporting Qi v1.2.3 MP-A10 operation, including default FOD thresholds, power regulation curves, and UART command set. Firmware can be updated or erased using STSW-STWBCGUI (UART) or STVP (SWIM interface) - no external programmer required for routine updates.

Which USB-to-UART adapter is compatible with the J501 connector?

The J501 UART jack requires an FTDI-based USB-to-UART dongle with micro-USB cable (e.g., FT232RL or FT231XS chipset). The board expects 3.3 V logic levels; drivers must include the FTDI VCP driver (v2.12.28 or later), and COM port must be manually selected in STSW-STWBCGUI before connection.

Can the STEVAL-ISB044V1 operate without a PC connection?

Yes - once configured and calibrated, the board operates autonomously: it performs auto-calibration at power-up, detects receivers, regulates power, and executes FOD without PC or GUI. UART is only required for initial setup, debugging, or parameter changes.

Does the board support Quick Charge input negotiation?

Yes - via J101 USB connector and internal D+/D− circuitry, the board negotiates 12 V from QC 3.0 chargers (e.g., KOVOL 24 W wall adapter). This enables EPP mode; the board draws up to 2 A at 12 V and delivers 15 W to compliant receivers with ≥80% system efficiency.