Infineon plans end-to-end programmable 50W wireless charging platform with integrated USB-C PD controller

Infineon plans end-to-end programmable 50W wireless charging platform with integrated USB-C PD controller

Business news |
By Nick Flaherty

Infineon Technologies has developed a more integrated  transmitter with a proprietary protocol and USB-C PD controller for 50W wireless charging as a step to a full end to end platform.

The WLC1150 transmitter, being shown at PCIM Europe 2023 next week,  is designed to be paired with the upcoming WLC1250 receiver IC for end-to-end proprietary wireless power transfer in industrial applications, healthcare equipment, robotics and drones, vacuum cleaners, power tools, docking stations, and smartphone chargers supporting Qi Extended Power Profile (EPP).

These require high efficiency, flexible thermal management options, low electromagnetic interference (EMI), integrated adaptive foreign object detection (FOD), inverter control, and several other features. The WLC1150 uses multiple methods to tune the adaptive FOD, including Q-factor, resonant frequency and power.

The transmitter supports 50 W wireless power transfer using a high-power proprietary charging protocol and a wide input voltage range of 4.5 to 24 V. The integrated fan buck controller enables thermal management by cooling the interface surface during high-power delivery. It also includes integrated gate drivers for the inverter, which is controlled by frequency, duty cycle, and variable voltage. It also integrates a USB type-C power delivery (PD) controller that supports the latest version of USB-PD 3.1 with programmable power supply (PPS) mode.

The WLC1150 is based on a programmable 32bit ARM Cortex-M0 processor equipped with 128 KB Flash, 16 KB RAM, ADC, PWMs, and timers. Its full-stack firmware has many configurable options that allow customization of application-specific foreign object detection, in-band communication, sensing, protection, and other system parameters.

The chip has an easy-to-use graphical user interface (GUI) that eliminates the need for code debugging and streamlines the configuration process. Combined with Infineon’s ModusToolbox design tools, the WLC1150’s programmable features enable the development of distinct and scalable wireless charging solutions for proprietary protocols as well as the latest Qi specification.

The WLC1150 complies with the WPC Qi 1.3 with EPP, basic power profile (BPP), and proprietary power delivery extension (PPDE). It supports systems with input power supplied from either USB PD/PPS or fixed input from a DC power supply. With either input configuration, the transmitter does not require a front-end DC-DC converter. This helps to significantly improve system efficiency.

The transmitter chip also has adjustable over-voltage protection (OVP), over-current protection (OCP), and over-temperature protection (OTP).

The WLC1150 for high power applications is available in a 68 pin 8 x 8 mm² in tray, as well as tape and reel packages, and can be ordered now.

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