Many people may not be familiar with wireless charging. They bought a wireless charging board a few days ago. They have opened up the analysis and it is not complicated. Needless to say, look at the picture and understand it. For everyone's science, wireless charging technology, also known as inductive charging, non-contact inductive charging, stems from wireless power transmission technology, is the use of near-field sensing, that is, inductive coupling, the power supply device to transfer energy to the device, The device uses the received energy to charge the battery and simultaneously for its own operation.
The transmitter of the board is relatively simple
Approximate diameter 65mm
The structure inside is very simple
One control board + one transmit coil. The control board uses the STM8 microcontroller, and the STM8 series is an 8-bit microcontroller from STMicroelectronics. This type of MCU is divided into three series: STM8A, STM8S and STM8L. STM8A automotive grade applications; STM8S is the standard family; STM8L is an ultra low power MCU.
The main performances are: advanced STM8 core, Harvard architecture with 3-stage pipeline, program memory with 8K bytes of Flash, data after 55K erasing in 55K environment, data memory can save 640 bytes of real data, EPROM can Up to 300,000 erases, RAM1K bytes
Looking at the wireless receiver
One coil plus a control board, and a magnetic shield, output DC5V. It can be connected to mobile phones and other devices through contacts or solder joints.
At present, wireless charging mainly has three advantages: First, it can achieve invisible equipment with low wear rate, wide application range, and relatively reduced area of ​​public charging area; second, high technical content, convenient operation, and relatively long distance can be implemented. The conversion of radio energy; the third is more convenient to operate. However, although the technical content of the equipment is high, the economic cost of the equipment is high and the maintenance cost is large. As the distance and power of the wireless charging device increase, the wear and tear of the useless power will also increase, which will undoubtedly bring certain difficulties to the device. The above is the semi-internal disassembly of the wireless charging for readers to read!
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