Disassembly report: letron 45W 1a1c dual port fast charging charger

Recently, the charging head network got a fast charging charger from letron. The design of the product is simple, and it is equipped with the popular 1a1c interface. It supports 18W and 45W fast charging respectively. It can meet the charging needs of two devices at the same time, with a total output of 5v5a and intelligent power distribution. Let's take a detailed disassembly of this charger to see how its internal design materials are.

1、 Appearance of letron 45W charger

The box is white, the charger is clearly visible, and the front is printed with letron brand, product name and 45W logo.

The charger parameter information is printed on the back. The package contains a charger.

The charger is made of PC flame-retardant material, with a combination of matte and bright sides at the waist. The transition between the sides is smooth. In addition, the logo of letron brand is printed on the body.

The charger parameters are printed on the input housing

Model: lp-pdl05

Input: 100-240V ~ 50 / 60Hz 1A





Manufacturer: Shenzhen lichuangpu Power Technology Co., Ltd

The top surface is equipped with 1a1c interface, black rubber core of usb-c port without copper exposure, and white rubber core of usb-a port.

The measured length of charger body is 52.77mm by vernier caliper. The width is 39.55mm.

Using chargerlab power-z kt002, the usb-a port supports apple 2.4a, Samsung 5v2a and DCP protocols, as well as qc2.0 / 3.0, AFC, FCP and SCP fast charging protocols.

In addition, compared with a port, kt002 also supports pe2.0, pd3.0 and PPS protocol. In addition, the PDO message shows that the usb-c port also has five fixed voltage ranges of 5v3a, 9v3a, 12v3a, 15v3a and 20v2.25a, and a PPS voltage range of 5.9-11v4.05a.

2、 Disassembly of letron 45W charger

The shell of the input end is disassembled, the pins are sealed and fixed with plastic plates, and the power is connected through metal elastic contact. There is a small plate at the input end for welding common mode inductors and other components.

iPhone Charger Adapter

At the front of PCB board, there is a plastic board between the transformer and the small board at the output end for isolation.

The back of PCB board is at a glance.

By observing the charger circuit, it is found that the charger adopts the structure of switching power supply wide range output, and the protocol chip controls the output voltage through the optocoupler. Next, we will start from the input to understand the information of each component one by one.

There is a small board on the left side, an I-shaped inductor and two high voltage filter electrolytic capacitors on the right side. Two high voltage filter electrolytic capacitors from Yongming, kcx series, specifications are 400V 33 μ F。 This is a special product for fast charging power supply launched by Yongming in 2019. Its working temperature range is - 55 ℃ ~ 105 ℃, and its service life is 3000 hours. It has the advantages of lightning resistance, low leakage current (low standby power consumption), high ripple current, high frequency and low impedance.

According to the charging head network, Yongming kcx series electrolytic capacitors are also used by bull 65W Gan charger, Philips 65W Gan fast charging socket, MOMEX 65W 2c1a Gan fast charging charger, Yubi 30W 1a1c Gan fast charging charger, jingzao 65W 1a1c Gan fast charging charger, Nubia 65W 2c1a deuterium front Gan fast charging and other products, Get the unanimous approval of customers.

iPhone Charger Cable

Yongming NPX series solid-state capacitors with 25V 470 output filter are adopted μ F。 The series capacitors have the characteristics of small volume, low ESR, high allowable ripple current and high reliability.

According to the charging head network, Yongming NPX series solid-state capacitors have been used by flash 100W 3c1a Gan fast charging charger, MOMEX 65W 2c1a Gan fast charging charger, Beisi 45W 1a1c Gan charger, Nubia 65W deuterium front Gan charger and other products. In addition, they are also used in 20W Mini charging of Xiaohei, Pinsheng, bangkeshi and other brands, which have been unanimously recognized by customers.

Summary of dismantling charging head net

iPhone Adapter

Letron's 45W dual port fast charging charger is made of PC material with white shell, matte waist and bright surface design, so it can get different plug-in and use experience. In addition, the charger is equipped with foldable American Standard pin, which is convenient for users to carry out. 1a1c interface supports QC, AFC, FCP, SCP, pe2.0, pd3.0 and PPS multiple fast charging protocols. It has 5.9-11v4.05a PPS voltage range and good overall compatibility, meeting the fast charging requirements of Huawei, Xiaomi, Samsung and other major brands.
iPhone Charger Adapter
Through the disassembly of the charging head network, we know that the input and output terminals of the charger are equipped with small plates to make full use of the internal space and compress the product volume. The switching power supply of the charger adopts hy1602 + hy903 fast charging scheme of Huayuan Zhixin, which is matched with Longteng high voltage superjunction MOS and Ruijun synchronous rectifier; The output voltage of the 1a1c interface is controlled by the high performance protocol chip ip2726, which realizes single port fast charging and dual port 5V output. In addition, Yongming kcx and NPX series fast charging capacitors are used for input and output filtering.