preface
Previously, the charging head network got the SAyN Shangying direct sales of a three-in-three charging set, the charger can be equipped with USB-A to USB-C/Micro USB/Lightning cable, because it is a direct sale from the factory, the price has come to more than 10 yuan, which can be said to be quite cost-effective. Although the product is cheap, it has the endorsement of national CCC safety certification, and the following charging head network will disassemble it to see how it is done.
Shangying charger set unboxing
The front of the package is printed with the SAyN Shangying brand, the appearance and name of the charger set, and the CCC certification logo.
The design of the other side is generally the same, but the charger map area has been changed to a transparent window design, and the actual charger set can be seen, which is convenient for offline exhibition.
The charger and cable are included in the package.
附带线材为USB-A to Lightning线。
The length of the wire is about 99cm.
The charger is designed with a classic straight plate shape, using a plastic shell made of PC fireproof material, and the waist is very smooth and glossy.
The SAyN brand is printed on the front center of the fuselage.
Charger parameter information is printed on one side of the fuselage.
The charger model T-C23 supports 110-240V~50/60Hz 0.35A input, and 5V2A output, the charger has passed the CCC certification, and the manufacturer is Dongguan Shiyang Technology Co., Ltd.
The input terminal of the charger is equipped with fixed national standard pins.
The output is equipped with a USB-A port and a black tongue.
The measured length of the charger body is 45.49mm.
The width is 37.31mm.
The thickness is 24.08mm.
Feel the size of the charger in your hand.
In addition, the net weight of the product was measured to be about 36g.
It is measured that the USB-A port supports DCP and Apple 2.4A charging protocols.
Shangying charger disassembly
The input housing is disassembled, and the pins and the PCBA module are connected to power through the metal sheet.
The PCBA module was taken out, and the measured module length was 41.11mm.
The width is 32.09mm.
The thickness is 16.15mm.
The PCB board is printed on one side, and the front of the board is equipped with fuses, input and output filter capacitors, transformers and other devices.
The back of the board is equipped with a rectifier bridge,
The input terminal of the PCBA module is listed at a glance, with a fuse resistor, a varistor and a power supply capacitor of the main control chip.
On one side of the board, there are color ring inductors, high-voltage filter electrolytic capacitors, and blue Y capacitors.
There is a transformer on the other side.
Fuse resistor jacket insulating tube.
Close-up of the fuse resistor.
Close-up of 1KV varistor for input overvoltage protection.
Close-up of the MB10F rectifier bridge.
Close-up of the color ring filter inductor.
The two high-voltage filter electrolytic capacitors are ZHANGZG brand, and the specifications are both 400V10μF.
The power supply capacitor of the main control chip is XuCon brand.
The specification is 50V 10μF.
UnionPay U6513BS is a high-performance, low-cost primary-side control power switch with built-in high-voltage power transistor, which can provide high-precision constant voltage and constant current output performance, especially suitable for low-power offline charger applications.
Close-up of transformer.
Close-up of two blue Y-capacitors.
The output is listed at a glance, and there are output filter capacitors on both sides.
The two output filter capacitors are of the same brand and are 10V 680μF.
UnionPay Power U771X is a high-performance synchronous rectified power switch to replace the secondary-side Schottky diode in flyback converters, with built-in ultra-low on-impedance power MOSFETs to improve system efficiency. The U771X supports both "floating" and "co-ground" synchronous rectification architectures, as well as system intermittent operation (DCM) and quasi-resonant operation (QR).
The U771X has a built-in VDD high-voltage power supply module, which does not require VDD auxiliary winding power supply, which reduces the system cost. The U771X has integrated VDD under-voltage protection and VDD voltage clamping.
Close-up of USB-A receptacle.
A list of all dismantling and a family photo.
Summary of the dismantling of the charging head network
This charger set comes with a charging cable, so users do not need to use additional wiring, and the matching cable can also be flexibly selected. The charger is designed with a classic straight board shape, supports 5V2A output, does not get hot when charging, and the price is quite good, it is good as a backup power supply, it can charge new and old mobile phones, and it can also supply power to small devices such as small fans and heat dissipation clips.
Through the dismantling of the charging head network, it is learned that the internal PCBA module design is simple, the PCB board adopts single-sided printing, and the UnionPay Bao U6513BS + U771X highly integrated power supply scheme is adopted, and the circuit design is simple and effectively reduces the system cost. The input and output are filtered by filter capacitors.