Biyi micro introduces 65W sealed gallium nitride fast charging scheme

2022-01-04

With the popularity of gallium nitride fast charging, packaging gallium nitride devices, controllers and drivers in the same chip has gradually become the mainstream and efficient solution. By integrating two to three chips in the traditional gallium nitride power supply, it not only simplifies the power supply design, but also greatly reduces the PCB area, meeting the pursuit of easy production and high cost performance of fast charging charger.

Biyi micro has launched two sealed gallium nitride chips in dfn8 * 8 package. Among them, kp22066 has built-in 165m Ω gallium nitride switch, and a single chip supports 100W power output. Large area heat dissipation pad is adopted at the bottom of the chip to effectively reduce the temperature rise of the device. At the same time, it also integrates high-voltage start and X-Capacitor discharge, and the standby power consumption is less than 30MW, meeting the increasingly stringent energy efficiency requirements.

After gallium nitride is sealed with the controller and driver, it can reduce the impact of parasitic parameters on high-frequency applications. Compared with the traditional fast charging solution of multiple chips, sealing can greatly reduce the ringing and overshoot caused by parasitic parameters, avoid misopening caused by parasitic parameters, improve the stability of the charger and meet high-frequency switching applications.

At present, Biyi micro has launched a number of complete gallium nitride fast charging solutions, including kp2801 PFC controller for high-power applications, kp2206 / 2202 for direct drive gallium nitride switches, sealed gallium nitride chip kp22064 / 22066 and high-frequency synchronous rectifier controller kp4060. In addition, the 120W fast charging scheme using PFC + gallium nitride sealed form has been launched, and the charging head network will bring you detailed analysis and test in the near future.

Charging head network Summary

By showing the reference design of Biyi micro 65W sealed gallium nitride fast charging, we fully feel the volume advantage of gallium nitride sealing. Sealing chip can significantly reduce the number of devices and simplify the design of charger. The reduction of the number of devices can reduce the mass production cost of the charger and speed up the production speed, so as to accelerate the market.

Through the test of conversion efficiency and standby power consumption, we can clearly see the performance advantages of sealed gallium nitride chip after integrating controller, driver and gallium nitride devices. The improvement of efficiency and the reduction of standby power consumption meet the increasingly stringent energy efficiency standards, are more friendly to the environment, and contribute to energy conservation and emission reduction.