Infineon Technologies WLC1115-68LQXQT

Overview

WLC1115-68LQXQT from Infineon is a programmable 15W Qi2-compliant wireless power transmitter IC with integrated USB Type-C Power Delivery 3.1 controller, Arm® Cortex®-M0 MCU (48 MHz, 128KB Flash, 16KB RAM), and dual gate drivers for buck-boost and inverter stages. It supports MPP, EPP, and BPP protocols, operates from 4.5V–24V input, and delivers FOD via Q-factor, resonance frequency, and power-loss detection - used in smart speaker charging pads and docking stations.

For engineers reviewing the WLC1115-68LQXQT datasheet, WLC1115-68LQXQT pinout, WLC1115-68LQXQT application, or WLC1115-68LQXQT equivalent, key selection criteria include Qi2 protocol stack support, integrated PD 3.1 + PPS, on-chip MCU programmability for FOD tuning, ASK/FSK bidirectional communication, and thermal protection across –40°C to +105°C.

Technical Context

The WLC1115 implements a full Qi2 transmitter stack with hardware-accelerated ASK demodulation and FSK modulation, coupled with an embedded Cortex-M0 subsystem running firmware for EPP negotiation, MPP magnetic alignment control, and real-time foreign object detection. Its integrated PD controller handles USB-PD 3.1 contract negotiation, including Programmable Power Supply (PPS) and legacy QC 2.0/3.0/AFC handshaking.

Power management includes a buck-boost PWM controller with pulse-skipping and FCCM modes, dual high-side/low-side gate drivers (HG1_0/LG1_0, HG2_0/LG2_0), and dedicated current sense amplifiers feeding an 8-bit SAR ADC. All timing-critical functions - inverter PWM generation, FOD sampling, and PD state machine - are synchronized to the internal 48 MHz oscillator.

Key Specifications

Pinout & Package

WLC1115-68LQXQT is housed in an 8.0 mm × 8.0 mm × 0.65 mm 68-pin QFN package (LD68B, 5.7 mm × 5.7 mm EPAD), optimized for thermal dissipation in compact wireless transmitter modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar wireless transmitter with integrated PD applications.

Compared with STWLC99TR and MP-A21, WLC1115-68LQXQT uniquely integrates full USB-PD 3.1 + PPS, Qi2 MAC/PHY, and field-upgradable firmware in one die - reducing system-level component count, certification effort, and time-to-market for certified 15W MPP/EPP transmitters.

Availability

WLC1115-68LQXQT is available at Aetrix Electronics and suitable for smart speaker charging pads, multi-device docking stations, furniture-integrated power surfaces, and portable travel chargers requiring stable component supply and full Qi2 certification readiness.

Supply support for WLC1115-68LQXQT 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive MCUs, and wireless charging solutions, with global R&D centers and ISO/TS 16949-certified manufacturing.

WLC1115 belongs to Infineon's Wireless Charging IC (WLC) product line, designed specifically for fully integrated, Qi2-compliant transmitter systems that unify power delivery, communication, and safety in single-chip solutions for consumer and industrial charging infrastructure.

FAQ

Does WLC1115-68LQXQT require an external crystal?

No. WLC1115-68LQXQT uses an internal 48 MHz precision oscillator for all timing-critical functions including ASK demodulation, inverter PWM, and USB-PD state machine. No external crystal or clock source is needed, simplifying layout and reducing BOM cost.

What firmware development tools are supported?

Infineon provides ModusToolbox™ SDK with WLC1115-specific middleware, including Qi2 stack libraries, USB-PD 3.1 protocol handlers, and FOD calibration utilities. Programming is done via SWD interface using KitProg3 or MiniProg4 debug probes.

Is magnetic power profile (MPP) support enabled out-of-box?

Yes. MPP support is implemented in ROM and activated by default upon boot. The IC performs automatic magnetic alignment detection using coil current phase analysis and communicates alignment status to the receiver via defined Qi2 MPP packets - no host MCU intervention required.

How is over-temperature protection implemented?

WLC1115-68LQXQT integrates a calibrated bandgap temperature sensor feeding an 8-bit SAR ADC. When junction temperature exceeds 105°C, the MCU triggers immediate power reduction, disables gate drivers, and asserts thermal fault flag via GPIO - meeting IEC 62368-1 thermal safety requirements.