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Infineon introduces a new highly integrated wireless charging transmitter IC

Jun 6 2023 2023-06 Power Infineon Technologies
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Infineon Technologies AG has further expanded its Wireless Charging (WLC) controller IC product lineup with the new WLC1150 wireless charging transmitter IC, providing a highly integrated, easy-to-design and cost-effective solution for applications requiring greater wireless power transmission capabilities.

     Wireless charging has become an integral part of today's battery-powered applications, bringing an easy-to-use, user-friendly experience to portable products across a wide range of industries. Infineon Technologies AG has further expanded its Wireless Charging (WLC) controller IC product lineup with the new WLC1150 wireless charging transmitter IC, providing a highly integrated, easy-to-design and cost-effective solution for applications requiring greater wireless power transmission capabilities. These applications mainly include industrial-grade applications, healthcare devices, robots and drones, vacuum cleaners, power tools, docking stations, and smartphone chargers that support the Qi standard Extended Power Profile (EPP).

     The transmitter uses a high-power proprietary charging protocol and supports a wide input voltage range from 4.5V to 24V, enabling wireless charging up to 50W. The built-in fan motor step-down controller cools the interface surface for thermal management during high power transfer. The product also comes with an integrated gate driver for inverters controlled by frequency, duty cycle and variable voltage.

     The WLC1150 transmitter features high energy efficiency, flexible thermal management design options, low electromagnetic interference (EMI), integrated adaptive foreign object detection (FOD), inverter control, and a number of other functions and features to meet the critical requirements of these applications. The WLC1150 ADAPTS the FOD by various methods such as quality factor, resonant frequency and power. It also supports adjustable overvoltage protection (OVP), overcurrent protection (OCP), and overtemperature protection (OTP). The WLC1150 transmitter IC can be paired with the upcoming WLC1250 receiver IC for an end-to-end, proprietary wireless power transmission solution.

     The transmitter also integrates a USB Type-C power supply (PD) controller that supports the latest USB-PD 3.1 Fast charge standard and Programmable Power Supply (PPS) mode. The WLC1150 complies with the WPC Qi 1.3 standard Extended Power Profile (EPP), Basic Power Profile (BPP), and Proprietary Power Supply Extension (PPDE) requirements, and allows the system to charge the system via a fixed input from a USB PD/PPS or DC power supply. Regardless of the input configuration, this transmitter does not require a front-end DC-DC converter, helping to significantly improve system efficiency.

     The WLC1150 is powered by a programmable 32-bit Arm®Cortex®-M0 processor and is equipped with 128 KB of flash memory, 16 KB of random access memory, and various peripherals such as ADC, pulse width modulation (PMW), and timers. Its full-stack firmware offers numerous configurable options to customize system parameters such as FOD, in-band communication, sensing, protection, and more for specific applications through an easy-to-use graphical user interface (GUI) without the need for code debugging, simplifying and increasing the efficiency of the entire configuration process. In conjunction with Infineon's ModusToolbox™ software and tools, developers can take advantage of the programmable features of the WLC1150 to develop unique and scalable wireless charging solutions that comply with proprietary protocols and the latest Qi standard.

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