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Wi-Fi news from ON Semiconductor

Comprehensive portfolio of wide bandgap devices for high-performance charging solutions

APEC 2021 – PHOENIX, Ariz. – June 7, 2021 – ON Semiconductor® (Nasdaq:ON), driving energy efficient innovations, has announced a pair of 1200 V full silicon carbide (SiC) MOSFET 2-PACK modules further enhancing their range of products suitable for the challenging electric vehicle (EV) market.

As sales of EV continue to grow, infrastructure must be rolled-out to meet the needs of drivers, providing a network of rapid charging stations that will allow them to complete their journeys quickly and without ‘range anxiety’. Requirements in this sector are rapidly evolving, requiring power levels in excess of 350 kW and efficiencies of 95% becoming the ‘norm’. Given the diverse environments and locations in which these chargers are deployed, compactness, robustness and enhanced reliability are all challenges that designers face.

The new 1200 V M1 full SiC MOSFET 2 pack modules, based upon planar technology and suited to a drive voltage in the range of 18-20 V, are simple to drive with negative gate voltages. The larger die reduces thermal resistance compared to trench MOSFETs, thereby reducing die temperature at the same operating temperature.

Configured as a 2-PACK half bridge, the NXH010P120MNF1 is a 10 mohm device housed in an F1 package while the NXH006P120MNF2 is a 6 mohm device in an F2 package. The packages feature press-fit pins making them ideal for industrial applications and an embedded negative temperature coefficient (NTC) thermistor facilitates temperature monitoring.

As part of the ON Semiconductor EV charging ecosystem, the new SiC MOSFET modules have been designed to work alongside driver solutions such as the NCD5700x devices . The recently introduced NCD57252 dual channel isolated IGBT/MOSFET gate driver offers 5 kV of galvanic isolation and can be configured for dual low-side, dual high-side or half-bridge operation.

The NCD57252 is housed in a small SOIC-16 wide body package and accepts logic level inputs (3.3 V, 5 V & 15 V). The high current device (source 4.0 A / sink 6.0 A at Miller plateau voltage) is suitable for high-speed operation as typical propagation delays are 60ns.

Complementing the new modules and gate driver are the ON Semiconductor SiC MOSFETs that provide superior switching performance and enhanced thermals when compared to similar silicon devices. This results in improved efficiency, greater power density, improved electromagnetic interference (EMI) and reduced system size and weight.

The recently-announced 650 V SiC MOSFETs employ a novel active cell design combined with advanced thin wafer technology enabling a best-in-class figure of merit (FoM) for (RDS(on)*area). Devices in the series such as the NVBG015N065SC1NTBG015N065SC1NVH4L015N065SC1 and NTH4L015N065SC offer the lowest RDS(on) in the market for D2PAK7L / TO247 packaged MOSFETs.

The 1200 V and 900 V N-channel SiC MOSFETs feature a small chip size that reduces device capacitance and gate charge (Qg – as low as 220 nC), reducing switching losses when operating at the high frequencies demanded by EV chargers.

During APEC 2021, ON Semiconductor will showcase SiC solution for industrial applications as well as presenting exhibitor seminars about the company’s solutions for off-board EV-charging. To register as a visitor to APEC 2021, please visit http://apec-conf.org/conference/registration/ .

Additional resources & documents:

Landing page: Energy Infrastructure

Video: 25kW SiC Module Fast EV DC Charger Power Stage

White paper: Demystifying Fast DC Charging: From Top to Bottom

Articles: Developing A 25-kW SiC-Based Fast DC Charger (Part 1): The EV ApplicationDeveloping A 25-kW SiC-Based Fast DC Charger (Part 2): Solution Overview

AdaptivMIMO technology provides flexible configurations for fast 6 GHz adoption

PHOENIX, Ariz. – Apr. 21, 2020 – ON Semiconductor (Nasdaq: ON), driving energy efficient innovations, announced sampling of its new QCS-AX2 chipset family that supports the 6GHz spectrum band based on the enhanced Wi-Fi 6E standard. Designed with a high performance, flexible architecture to maximize usage of the 6GHz band, the new product family is optimized for high-throughput Wi-Fi applications, such as access points, gateways, and mesh networking solutions for dense environments and underserved areas.

The QCS-AX2 series is built on an integrated baseband and RF (radio frequency) architecture that supports key Wi-Fi 6E features, such as orthogonal frequency-division multiple access (OFDMA), advanced MU-MIMO (Multi-User, Multi-Input, Multi-Output), and 160MHz channel support for faster speeds, and SmartScan channel selection for maximum band utilization. The new product portfolio will include the following:

  • QCS-AX2-A12: tri-band (6GHz/5GHz/2.4GHz) with AdaptivMIMO technology supports flexible 8×8 or 4×4 configurations
  • QCS-AX2-T12: tri-band concurrent 4×4 operation for high performance, cost-effective router solutions
  • QCS-AX2-T8: tri-band concurrent 8-stream configurations for mesh nodes and mainstream access points

 

As the Federal Communications Commission anticipates the opening of the 6GHz band in the United States later this year, up to 1,200 MHz of newly available spectrum will be designated for Wi-Fi and other unlicensed use. With almost 5 times of spectrum more than the current 2.4 GHz and 5GHz bands combined, the 6GHz band is accelerating the development of next generation Wi-Fi 6 applications. While the 6GHz client ecosystem takes time to build out, Wi-Fi infrastructure devices, such as gateways, routers, and access points will need to continue to support existing dual band (2.4GHz/5GHz) clients; infrastructure applications such as 6GHz backhaul between gateways and mesh nodes will lead deployments.

ON Semiconductor’s Wi-Fi 6E solutions are designed to accommodate the transition to the 6GHz band with AdaptivMIMO technology while addressing mainstream 6GHz applications. A Wi-Fi 6E infrastructure device with AdaptivMIMO allows the network to operate in the 5GHz or 6GHz band depending on the clients present in a subscriber’s home network to maximize performance, coverage, and utilization. The QCS-AX2 series provides the Wi-Fi performance and connectivity in congested environments to multiple devices that applications demand.

“We are excited about the tremendous opportunities that Wi-Fi 6E opens for the industry. We are in the forefront of building Wi-Fi 6E platforms that enable even better speed, efficiency and performance for the Home, Enterprise, Automotive and IoT segments,” said Irvind Ghai, Vice President of Marketing, Quantenna Connectivity Solutions at ON Semiconductor. “ON Semiconductor is dedicated to innovation in Wi-Fi technology, and will continue to leverage its connectivity excellence to provide end-to-end solutions that accelerate key Wi-Fi 6E ecosystems.”

“Our new generation of QCS-AX2 with AdaptivMIMO allows OEMs fast time-to-market with optimized performance across the 3 bands. As Wi-Fi 6E infrastructure proliferates, it will seed the 6GHz ecosystems. Client devices will also benefit from improved efficiency, lower latency and jitter, and less interference, providing better user experience across applications and environments,” said Simon Duxbury, General Manager & Vice President, Quantenna Connectivity Solutions, ON Semiconductor.

ON Semiconductor is now sampling the QCS-AX2 solutions to customers.

About ON Semiconductor
ON Semiconductor (Nasdaq: ON) is driving energy efficient innovations, empowering customers to reduce global energy use. The company is a leading supplier of semiconductor-based solutions, offering a comprehensive portfolio of energy efficient power management, analog, sensors, logic, timing, connectivity, discrete, SoC and custom devices. The company’s products help engineers solve their unique design challenges in automotive, communications, computing, consumer, industrial, medical, aerospace and defense applications. ON Semiconductor operates a responsive, reliable, world-class supply chain and quality program, a robust compliance and ethics program, and a network of manufacturing facilities, sales offices and design centers in key markets throughout North America, Europe and the Asia Pacific regions. For more information, visit https://www.onsemi.com.

Adaptive MIMO in the Era of 6GHz Wi-Fi

In 2018 the Federal Communications Commission (FCC) of the United States issued a Notice of Proposed Rulemaking (NPRM) that opens up a maximum of 1.2GHz of spectrum between 5.925GHz to 7.125GHz for unlicensed use. The newly released spectrum has the potential to offer over twice the spectrum currently allowed in 2.4GHz and 5GHz. The additional channels allow for not only high speeds such as 10Gbps, but also support more users in dense environments such as Multi-Dwelling Units (MDUs). It is obvious that 6GHz has the potential to usher in a new era for Wi-Fi computing. The FCC’s publication of the NPRM puts it on course for eventual legalization, by most accounts, towards the end of 2020. Other countries, such as those in the European Union and in Asia, will follow suit with their own adoption of 6GHz, most likely in 2022.

While there is little doubt that the introduction of 6GHz is a great development, the mechanics of its adoption into everyday devices that we all have and love are a bit more complex. We can look at the adoption of Wi-Fi 5 (802.11ac) technology as a good model of what will most likely happen. The official 802.11ac specification was published by IEEE in December 2013. By the end of 2016, all smartphones fully adopted 802.11ac. In 2016, there were over 1.4 billion new mobile phones shipped with the majority (over 1 billion) being 802.11ac (Figure 1). If we apply this model for Wi-Fi 6 (802.11ax) 6GHz client devices, it will also likely be approximately 3 years from when IEEE publishes the 802.11ax specifications (June 2020) to when there will be over 1 billion new Wi-Fi 6 client devices, which will be middle of 2023. However, with the addition of 6GHz regulatory approval by the end of 2020, this timeline will most likely be slightly extended to the end of 2023, three years after the FCC fully legalizes 6GHz operation by end of 2020 (Figure 2).

Figure 1. Wi-Fi 5 (802.11ac) Adoption by Client Devices

Figure 2. Overall Timeline for Wi-Fi 6 and 6GHz Adoption

With the introduction of 6GHz, it may be deceptively simple to assume that next-generation Wi-Fi 6 infrastructure devices such as home gateways and access points launching in 2020 will all be designed with a fixed architecture, one that dedicates a fixed 4×4 radio to each of the 3 bands: 2.4GHz, 5GHz and 6GHz (Figure 3). As previously stated, since there will be a small quantity of 6GHz Wi-Fi 6 clients until the end of 2023, a gateway solution that devotes any dedicated 6GHz circuitry will be mostly unused for a significant portion of the time. That means the cost and space associated with these new 6GHz components will essentially be wasted inside the gateway. However, service providers must produce and deploy forward-looking gateways as their replacement cycles tend to be longer than that of client devices. These two competing dynamics present an interesting challenge for service providers who are considering the inclusion of Wi-Fi 6 with 6GHz support in their roadmaps.

Figure 3. Fixed, Triple Frequency 4×4 Design

A potential solution can be found in a technology called Adaptive MIMO (multiple input, multiple output). Adaptive MIMO was first introduced by Quantenna, now a part of ON Semiconductor, in June 2018 as a way for infrastructure devices to be dynamic and change their 5GHz MIMO configuration between one 8×8 radio and two 4×4 radios depending on the end user’s home environment, such as number of client devices, amount of interference from neighbors and other factors. However, this technology can be an even more powerful solution as it can address the complex issue of 6GHz market adoption for Wi-Fi 6 gateways. Adaptive 6GHz MIMO means that one hardware design can adapt itself between one 8×8 5GHz plus one 4×4 2.4GHz radios (Configuration 1) and three 4×4 radios, each operating at 6GHz, 5GHz and 2.4GHz (Configuration 2). When this design is first deployed, the device infrastructure will reflect Configuration 1. By the end of 2023 with the market adoption of Wi-Fi 6 6GHz, the infrastructure device will operate in Configuration 2. This configuration can be controlled using intelligent analytics which determines the prevalence of 6GHz Wi-Fi 6 clients in a network. It is important to note that Adaptive MIMO design incorporates a new, unique, loss-less 5-7GHz FEM (Front End Module).

Figure 4. Adaptive 8×8 Design

The introduction of 6GHz is expected to bring about new performance and usability for Wi-Fi 6 devices. While it offers remarkable improvements in upcoming Wi-Fi 6 networks, it also has the ability to dramatically transform the wireless landscape. The next Wi-Fi standard, IEEE 802.11be, is set to establish 320MHz channel operation in the 6GHz band using up to 16×16 MIMO configuration on infrastructure devices. The combination of these developments can increase speed to over 40Gbps, offer previously unseen range performance, and lead to a new age of advance Wi-Fi applications. However, to get there, infrastructure devices must adopt intelligent and cost-efficient architectures, such as Adaptive MIMO.