Disassembly report: Lenovo Xiaoxin intelligent projector original 65W gallium nitride charger

2022-07-08

Lenovo has launched an ultra-thin Xiaoxin 520 intelligent projector, with 1080p high resolution, 4.8cm ultra-thin thickness, and a very compact design. It can be carried with a notebook to get a new viewing experience. Lenovo has equipped this thin projector with a gallium nitride charger, which is also small and exquisite. It matches the style of the projector, and uses a usb-c interface to support 5-20v output voltage, which can charge notebooks and mobile phones.

The charging head network has obtained this 65W gallium nitride adapter. Now let's disassemble it to see what design the original power adapter of this projector adopts.

Lenovo charger adopts white body, fixed pins and standard charger design. The charger supports 65W PD fast charging. Thanks to the universal USB PD interface, this charger not only supplies power to the supporting projector, but also supplies power to the notebook, which is very convenient.

According to the disassembly of charging head network, this charger adopts flyback topology and wide voltage output design. Dongke semiconductor's fast charging power supply scheme is built into the charger, which is composed of dk065g sealed gallium nitride chip and dk5v100r10m synchronous rectifier chip. Through disassembly, it can be seen that the peripheral components of dongke's sealed gallium nitride chip power supply scheme are very simple.

The internal PCBA module of the charger is wrapped with brass fins, the front of the PCB is glued, and the back is equipped with a heat conducting pad to transmit heat to the fins for dissipation, meeting the design of long-term high-power output. The primary filter capacitor is from topaz, and the secondary solid-state filter capacitor is from Berek. The materials used in the whole machine are well-known brands.