Disassembly report: lichuanpu 65W 2c1a gallium nitride charger

2022-07-07

65W multi port charger usually has two usb-c ports and one usb-a port, which can meet the charging needs of most occasions. Thanks to the versatility of usb-c, a charger can charge notebooks and mobile phones, which is favored by users. The charging head network has obtained a 2c1a three port 65W gallium nitride charger launched by lichuangpu. The two usb-c ports support power blind insertion and intelligent power distribution, which is very practical.

Next, the charging head network will disassemble the 3-port 65W charger of trump to see which scheme combination is used internally.

This 65W charger of lichuangpu adopts folding pins, with a thickness of only 28mm. It is small, light and portable. The charger has 2c1a three port output, two usb-c ports support power blind plug, and the supported protocols are the same. It has five groups of voltage gears: 5v3a, 9v3a, 12v3a, 15v3a, 20v3.25a, and a group of PPS gears: 3.3-21v3a. It can meet the fast charging needs of mobile phones and laptops.

According to the disassembly of the charging head network, the 65W gallium nitride charger of lichuangpu adopts the combination welding of multiple PCBs, and the heat conduction pad is pasted at the corresponding heating device position, and the heat dissipation is carried out through the copper-clad PCB, simplifying the heat dissipation design. The charger uses the elevation hl9550 gallium nitride sealed chip internally, with a built-in 170m Ω gallium nitride switch tube, which meets 65W and higher power applications.

The synchronous rectifier controller of the charger is from Huayuan semiconductor, and the output protocol chips are from silicon cloud semiconductor. The combination of xpd737+xpd767 is used to realize three port output and support automatic power distribution. Two way step-down controller, equipped with Ted synchronous rectifier. The built-in current sampling resistor and VBUS switch in the cloud silicon protocol chip, coupled with the highly integrated gallium nitride sealing scheme, greatly simplifies the charger circuit design.