At the end of May 2021, the USB-IF Association released the latest USB PD3.1 fast charging standard, adding three voltage levels of 28V, 36V, and 48V, and increasing the charging power to 240W, which is expected to realize fast charging. Unification. At present, Apple has taken the lead in launching the world's first fast charging source that complies with the USB PD3.1 standard, providing a reference case for third-party power supply manufacturers to enter the new standard fast charging market.

As the industry's leading GaN power chip manufacturer, Navitas Semiconductors has been active in the consumer power supply market. Recently, the charging head network learned that the Navitas Semiconductor engineer team is developing a 48V 5A power supply solution that meets the USB PD3.1 fast charging standard, and is actively deploying the fast charging market in the future.

It is reported that Navitas Semiconductor’s 240W fast charging source adopts advanced totem pole PFC+LLC architecture, supports maximum 48V 5A output, and is also backward compatible with 36V, 28V, 20V, 15V, 12V, 9V, 5V and other outputs Voltage. It can be seen from the front of the power solution that the layout of components is very compact, and the volume of the whole solution is effectively controlled. The PCB size is only 91mm × 50mm × 22.4mm, and the equivalent power density is about 2.35W/cm³, which is the current 100W-120W The power density of fast charging source is 2 times.

Navitas Semiconductor's 240W fast charging source solution supports 90-264VAC 47-63Hz global voltage input. The input terminal adopts totem pole PFC solution. At the same time, it uses two Navitas Semiconductor's latest generation GaN Fast gallium nitride power chips. It is understood that the efficiency of the entire PFC part is close to 99%. Compared with the use of traditional silicon devices, the complexity of the entire circuit can be greatly reduced, the system cost can also be controlled, and the advantages of gallium nitride devices can be fully utilized.

In terms of LLC architecture, the solution also uses two Navitas semiconductor GaN Fast power chips as LLC half-bridges. The switching frequency of GaN power devices can be increased from 100KHz to 300KHz, which reduces the volume of the transformer core by 30%. Left and right, on the one hand, the whole solution becomes more compact, and on the other hand, the cost of structural parts can be reduced.

Summary

In the consumer fast charging source market, the GaN Fast gallium nitride power chip developed by Navitas Semiconductor has successfully won the favor of first-line mobile phone and notebook manufacturers such as Dell, Lenovo, Xiaomi, OPPO, LG, Asus, etc., and has helped brand manufacturers launch multiple A classic GaN fast charging source. Not only that, but in the third-party accessory market, Navitas Semiconductor's GaN Fast power chips are also very popular with power supply manufacturers and are adopted by many 100W fast charging models. It is reported that the current cumulative shipments of GaN Fast power chips have exceeded 30 million, and sales continue to grow.

After achieving fruitful results in the existing consumer power supply market, Navitas Semiconductors once again led the industry and continued to deploy the more powerful USB PD3.1 fast charging source market to continuously output power for the prosperity and development of the fast charging source market. It is believed that in the near future, 240W chargers based on the USB PD3.1 fast charging standard will meet with consumers.