Disassembly report: yuemi 65W 1a1c gallium nitride fast charging charger

2021-09-26

Since the outbreak of the gallium nitride fast charging market, Xiaomi has launched four gallium nitride fast charging chargers with 33W, 55W, 65W and 65W dual ports, each of which has its own unique positioning to meet the purchase needs of all kinds of consumers. Recently, the charging head network has obtained a 65W gallium nitride fast charging charger from Xiaomi ecological chain enterprise Beijing yuemi Technology Co., Ltd.

This charger is equipped with the popular 1a1c dual output interface, which supports the maximum 36W and 65W fast charging respectively, and also supports the 45W + 18W dual port output strategy to meet the fast charging needs of major brands of mobile phones and laptops. Next, the charging head network will disassemble it in detail to see how it is doing compared with big brother Xiaomi's Gan charger.

Yuemi's 65W 1a1c dual port fast charging gallium nitride charger adopts common cylindrical design, is equipped with 1a1c popular dual output interface, and is compatible with multiple fast charging protocols such as qc2.0 / 3.0, AFC, FCP, SCP, pe2.0 and pd3.0. It has good overall compatibility. It can not only be compatible with major brand equipment, but also meet the fast charging of two equipment at the same time.

Through the disassembly of the charging head network, it is found that in addition to the main board, the charger is also equipped with an input small board and two output small boards to make full use of the internal space, and all components are glued and reinforced. The charger adopts the most mainstream QR quasi resonant flyback power supply architecture with fixed voltage output and two DC-DC secondary step-down output schemes.

Gallium nitride power devices adopt the future g1n65r240pb of domestic emerging brand ganext gallium, and the two DC-DC circuits adopt Zhirong sw3516h and sw3517s high integration schemes respectively. Thanks to the support of gallium nitride black technology and the use of highly integrated step-down fast charging scheme, as a dual port charger, the power density has reached 0.94w/cm ³， The whole is very small.