Disassembly report: McDowell gan5 Mini 65W 2c1a gallium nitride charger

2022-07-08

With the continuous popularity of usb-c interface and PD fast charging in mobile phones and computers, the charger has developed from single port to multi port, and gallium nitride is used to further reduce the size. The efficiency is improved, and multiple devices can be charged at the same time. Various advantages make the gallium nitride multi port charger a favorite of consumers.

McDonnell has launched a new generation of gan5 mini three port gallium nitride charger, which has been upgraded in an all-round way. With PI gallium nitride sealed chip, it has higher integration, synchronously improved power density and smaller size. Next, the charging head network will disassemble this fully upgraded gallium nitride fast charging to see how the interior is designed.

McDonnell gan5 mini three port gallium nitride charger is small and portable with a long column shape and folding pins. The charger has three output interfaces of 2c1a, supporting 67W PD fast charging and 3.3-20.3v3.3a PPS fast charging. The usb-a port supports SCP fast charging protocol, which supports fast charging of notebooks and Android phones very well.

According to the disassembly of the charging head network, McDonnell's charger has built-in two PI highly integrated master chips, together with two transformers, one large and one small, to form two switching power supplies. The output protocol chip uses British chipset ip2738 for three port protocol control, and uses agmsemi core control source tube for parallel output and interface control of two switching power supplies, which is different from the previous secondary step-down scheme and more flexible.

The charger uses kaizexin high-voltage electrolytic capacitor in combination with Ruilong and Shengyang solid-state capacitors for filtering. The rectifier bridge, power chip and transformer are covered with heat sink for heat dissipation. The overall design and materials are very reliable.