Disassembly report: Beisi 45W 1a1c gallium nitride charger

2021-11-16

Baseus, a well-known e-commerce brand, has launched a variety of gallium nitride fast charging products, including the previously disassembled 65W 2c1a, 120W 2c1a, 45W dual usb-c ports, 45W 1Ac and new 65W 2c1a, which has become a brand worthy of the name with the most gallium nitride fast charging products.

Today, the charging head network wants to share with you the disassembly of Beisi 45W 1a1c gallium nitride fast charge. This product basically continues the classic shape design style of Beisi 65W gallium nitride fast charge. The long shape is matched with folding pins and is very portable. In case of single port output, the usb-c interface supports the maximum 45W output power, which can quickly charge most laptops and mobile phones; 30 + 18W configuration for dual port output and intelligent power distribution to meet the application scenario of rapid charging of two devices at the same time. Let's take a look at the detailed disassembly of this product.

Beisi 45W 1a1c gallium nitride charger has a slender body and foldable pins, which is easy to carry. 1a1c output port supports multiple fast charging protocols such as qc2.0 / 3.0, AFC, FCP and SCP, with good compatibility; The usb-c port also supports pd3.0 fast charging, with 5 / 9 / 12 / 15v3a, 20v2.25a and 3.3-11v/3a voltage gears. Support dual port 30W + 18W fast charging output, charge two devices at the same time, and reduce charging time and cost.

According to the disassembly of the charging head network, the overall circuit of this charger adopts switching power supply and two-way DC-DC architecture. The switching power supply part is composed of PI highly integrated main control chip sc1933c and new power synchronous rectifier MOS to output fixed voltage; Then, both channels use Zhirong sw3510 and Ruijun MOS to realize secondary step-down output. Two Zhirong sw3510 can be matched with one MCU to realize the maximum output power mode of single port is 45W and double port is 30W + 18W.

The three-stage design of the circuit board has clear primary level, and the use of PI highly integrated main control chip and Yongming capacitor can effectively reduce the volume of the charger; The input end is equipped with heat sink, the transformer is wrapped with insulating tape, and all internal components are glued to ensure the stability and heat dissipation performance of the charger.