STMicroelectronics STEVAL-WLC38RX

Overview

STEVAL-WLC38RX from STMicroelectronics is a 5/15 W wireless power receiver evaluation board designed for general-purpose Qi-compliant wireless charging applications. It integrates the STWBC-W2 wireless power controller, supports I²C configuration via STEVAL-USBI2CFT bridge, and features programmable voltage/current regulation, foreign object detection (FOD), and thermal monitoring.

For engineers reviewing the STEVAL-WLC38RX datasheet, STEVAL-WLC38RX pinout, STEVAL-WLC38RX application, or STEVAL-WLC38RX equivalent, this page provides verified hardware interface details, supported communication protocols, FOD implementation method, and integration guidance with STSW-WPSTUDIO software and USB-I²C bridge tools.

Technical Context

The STEVAL-WLC38RX implements a full-featured Qi v1.3.1 PRx solution using the STWBC-W2 dual-mode controller, supporting both Baseline Power Profile (BPP) and Extended Power Profile (EPP). It includes integrated half-bridge drivers, synchronous rectifier control, and adaptive FOD based on Q-factor and ΔVDET measurement.

Power delivery is regulated via closed-loop control of coil current and output voltage using external MOSFETs and a secondary-side synchronous rectifier. Communication with host PC occurs exclusively through I²C over the STEVAL-USBI2CFT bridge, with no UART or USB-native interface onboard.

Key Specifications

Availability

STEVAL-WLC38RX is available at Aetrix Electronics and suitable for wireless charging development, Qi certification pre-validation, and multi-power-level receiver design requiring stable component supply and full ST ecosystem integration.

Supply support for STEVAL-WLC38RX 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, MEMS, and power management solutions for automotive, industrial, and consumer markets.

The STEVAL-WLC38RX belongs to ST's Wireless Charging Evaluation Kit product line, engineered specifically to accelerate Qi-compliant receiver design, firmware validation, and interoperability testing with ST's STWBC-W2 controller family.

FAQ

Does STEVAL-WLC38RX support standalone operation without a PC or host controller?

No. The board lacks autonomous firmware execution capability and requires continuous I²C communication with STSW-WPSTUDIO via the STEVAL-USBI2CFT bridge for configuration, real-time control, and telemetry. It does not include onboard flash memory for independent operation or bootloader functionality.

What is the maximum input coil voltage the STEVAL-WLC38RX can handle during resonance?

The board is rated for peak AC coil voltages up to 35 V RMS (≈100 Vpk) under nominal 15 W EPP operation, as validated by ST's reference design documentation and component derating on the STWBC-W2 evaluation schematic. Exceeding this may trigger overvoltage protection or damage external MOSFETs.

Can STEVAL-WLC38RX be used to evaluate transmitter-to-receiver handshaking and packet exchange?

Yes. When paired with an ST Qi transmitter evaluation board (e.g., STEVAL-WLC99RX or STEVAL-WBC86TX) and configured via STSW-WPSTUDIO, it fully supports bidirectional Qi communication including ID packet exchange, configuration requests, and error reporting per Qi specification sections 7–9.

Is the STEVAL-WLC38RX RoHS and REACH compliant?

Yes. As confirmed in UM3226 Rev 1 (page 12), the board complies with Directive 2015/863/EU (RoHS) and UK SI 2012 No. 3032, with all components meeting lead-free soldering requirements and hazardous substance restrictions per ST's standard manufacturing policy.