NXP chip doubles up on in-car wireless charging

August 31, 2020 //By Nick Flaherty
NXP doubles up on 15W in-car wireless charging
A single MWCT controller from NXP charges two Qi mobile devices simultaneously at up to 2x15 Watts

NXP Semiconductors has launched the first multi-device 15W Qi wireless charging system driven by a single MWCT controller for production vehicles.

The system, with optional near field communication (NFC) pairing, helps carmakers offer a differentiated in-car experience to their customers by enabling the passenger and driver to simultaneously charge smartphones wirelessly through one console. The use of a single MWCT device in the vehicle enables carmakers to benefit from a reduced cost and physical footprint for device charging. Based the Qi standard, it supports all Qi enabled phones, including iPhone, Samsung, Huawei, Xiaomi and others.

The MWCT series is enabled by a NXP’s hybrid DSC core with dedicated peripherals that allow the 2 Qi protocols to run in parallel in a single MWCT controller. New patented technologies, such as Clean EMC (CEMC), provide higher electromagnetic compatibility performance, which is required for CISPR 25 Class 5 in 15W systems. These innovations allow OEMs to cut the overall system bill of materials. It also includes unique Foreign Object Detection (FOD) methods for safety.

Consumers need their phones to be charged on the go in order to access information, make purchases, maintain contact with friends and family and tap emergency services when required. Wireless charging is an elegant solution that gets rid of bulky chargers and cords and is increasingly in demand.

“Wireless charging enables a cleaner, clutter-free console that provides convenience and simplicity to consumers. Dual charging is the next step,” said Denis Cabrol, Sr. Director, NXP. “As the leader in in-vehicle charging, NXP is pleased to make this groundbreaking technology available to carmakers who are at the leading edge of creating experiences for their customers.” 

The controller family is production-ready solution that is easy to implement through readily available software and hardware design files. It includes the MWCT2xx3A 15W Wireless Charging Transmitter ICs, multi-coil supported per channel for expansion of charging area and NXP’s Qi library of hardware and software that is already used for millions of Qi 1.2.4

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