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SHANGHAI, Aug. 25, 2021 /PRNewswire/ — NuVolta Technologies (hereinafter referred to as NuVolta) today announced the launch of the first high-power wireless charging reference design for the automotive market – NVTREF8040Q, based on Volta for wireless charging of mobile phones With years of accumulation in the field, this wireless charging transmitter solution integrates high integration, high efficiency and high power, and is applied to the automotive pre-installation market. With the launch of NVTREF8040Q, it will provide customers with more efficient, freer and safer wireless charging solutions.
1. Voda released the first 50W car wireless charging solution
In recent years, with the rapid development of automotive smart cockpits, major auto OEMs have noticed a strong demand from consumers for wireless charging of mobile phones. In order to cope with more changeable application scenarios in the car cockpit, the loading rate of wireless charging modules in cars is getting higher and higher.
In the domestic wireless charging market, Voda semiconductor, as a domestic semiconductor supplier with the largest market share in the consumer market, closely followed the pace of international giants and launched the first in-vehicle high-power wireless charging solution – NVTREF8040Q (Figure 1) in only half a year. ), the sword refers to the vehicle market.
The reference design NVTREF8040Q released this time is equipped with Voda’s new generation of car wireless charging chip NU8040Q, and samples are currently being applied for. This release broke the monopoly of foreign companies in the vehicle wireless charging industry, and Fuda became the leader of domestic semiconductor companies in this field.
2. Volda’s 50W vehicle wireless charging solution—performance advantages of NVTREF8040Q
The efficiency and power of the vehicle wireless charging solution are greatly improved, showing the advantages of the reference design NVTREF8040Q.
The following will be elaborated from the perspective of efficiency, software and design.
2.1 Efficiency as high as 77%, the highest in the industry
The efficiency of the vehicle 50W wireless charging reference design NVTREF8040Q released by Voda this time is as high as 77%, reaching the highest level in China.
At the hardware level, in addition to the low internal resistance of the smart full-bridge chip NU8040, the Voda team also optimized the dead time of the MOS tube. At the software level, through the optimization of charging logic and control strategy, the charging efficiency is further improved, which reflects Voda’s powerful system construction capabilities.
2.2 Modular software platform, MCU is optional
In order to prevent software development from becoming a bottleneck in research and development, Voda, based on years of deep experience in the field of wireless charging, is committed to liberating customers’ dependence on the dedicated platform for wireless charging, and has developed a set of ultra-high adaptability software platforms with the following characteristics:
The software platform adopts a layered structure, which separates and abstracts the bottom layer software and application layer software. The bottom layer software is used to adapt to different MCU platforms, and the application layer software realizes the wireless charging function, which can be reused on different MCU platforms and can be greatly reduced. Development time for platform replacement.
MCU platform of your choice
Relying on the highly integrated intelligent full bridge, the resource requirements for MCU are greatly reduced, and the strong binding between wireless charging applications and specific MCU platforms is released, allowing customers to freely choose familiar development platforms, such as general-purpose MCUs, major Global brands and domestic automotive MCU products are available, which can help customers optimize the supply chain.
GUI interface debugging tool
The software platform supports debugging the Demo board through the GUI interface, and configures the coil type, coil quantity, private protocol type, common MCU platform, power level, etc. through the graphical interface, allowing customers to adapt at will. In addition, one-key calibration completes initialization, and intermediate variables are printed during debugging to realize status tracking. Quickly completing debugging is not a dream.
3. Ultra-high precision Q value detection
In response to the difficulty of Q value detection in the field of wireless charging, the Voda team creatively designed a hardware detection Circuit, which can increase the sensitivity of Q value detection by more than 30%. The specific improvement value depends on different foreign objects, mobile phones and other detection objects. It can be increased by 87%.
In addition to improving the sensitivity, the circuit design also greatly improves the consistency of the Q value detection results. For this technology, Voda has applied for a patent.
4. High integration, extremely simplified circuit design
Voda’s wireless charging transmitter chip (Tx) has ultra-high integration and integrates all important functions in wireless charging applications: high-efficiency full-bridge, low-EMI FET drive, non-destructive current detection, high-precision Q-value detection, digital Demodulation modules, etc., allow customers to extremely reduce the size of the solution, reduce the complexity of circuit design, greatly shorten the research and development cycle, and help products to be introduced to the market faster.
Vodafone released the first in-vehicle wireless charging reference design – NVTREF8040Q, which aims to provide customers with a safe and efficient high-power wireless charging solution. Combined with Voda’s software platform, three major advantages can be achieved: MCU liberalization, coil liberalization, and debugging liberalization. At present, Voda has cooperated with many domestic car customers. With the development of the domestic car wireless charging market, Voda’s car wireless charging products will continue to bring more value to customers and realize the vision of car wireless charging anywhere.