First QFN chip for WiFi 6/6E in smartphones

April 28, 2021 // By Nick Flaherty
First QFN chip for WiFi 6/6E in smartphones
OnePlus is using NXP’s QFN RF Front End Solution for WiFi6 for its latest high-end flagship smartphone

NXP has developed the first WiFi6/6E chip in a quad flat no-lead package for high end smartphones.

WiFi6 provides higher data rates at 5GHz, while 6E operates at 7GHz, which impacts on the complexity of the front end chip design. The WLAN7205C single channel chip integrates a monolithic power amplifier, switch and low noise amplifier to improve the range capability of the handset’s WiFi communications.

The 2x2mm 16pin HWFLGA16 QFN package can be placed close to the antenna, reducing trace losses--unlike dual channel, modular solutions available in the market. This improves transmission and reception, increases battery life for longer WiFi use and enables faster data transmission.

The WLAN7205C includes integrated RF decoupling capacitors for all the VCC and control pins and requires no external matching components with DC free RF ports except for the antenna port by using an on-chip ESD coil. There are five transmit modes per band, enabling flexibility for power efficiency adaptation, and two receive modes enabling gain step between LNA mode and Bypass mode. IO levels support 1.2 V and 1.8 V logic interface up to 2.1 V of max input level and there is ESD protection on all pins.

“NXP delivered a small, proven QFN solution that made it possible to accelerate the time to market window supporting the new Wi-Fi 6 technology with our flagship OnePlus 9 series smartphone,” said Apollo Gu, RF Director of OnePlus.

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