1, What are the components of wireless charging? The left side is TX, that is, the transmitter, and the corresponding product is the wireless charging transmitter. On the right is Rx, that is, the receiving end, and the corresponding product is a mobile phone with wireless charging function. TX end: MCU, power full bridge, and LC resonant Tank composed of inductors and capacitors, where the inductor is the transmitting end coil.
2, this circuit diagram with chip sl1052 as control, simple structure, complete functions. Pin function 1 Power end. 2 Temperature monitoring input. 3 Charging status indicator. 4 Grounding terminal. 5 Adjust the tube driver. With the base of the external regulating tube. 6 Charging control. 7 Current sampling input. The charging current is determined by the voltage difference between the power supply and this pin.
3, wireless charging methods include electromagnetic induction, magnetic resonance, electric field coupling and radio wave transmission, wireless charging of mobile phones mostly uses the principle of electromagnetic induction. Electromagnetic induction wireless charging, when the current of the power supply through the coil (wireless charger's power supply coil) will generate a magnetic field, other not throughMicrocontrol unit. Also known as A single chip microcomputer or single-chip microcomputer, it is to appropriately reduce the frequency and specifications of the central processor, and the memory, counter, USB, A/D conversion, UART, PLC, DMA and other peripheral interfaces. MCU (multi control unit) Multi-control unit, used to control multi-channel video, mostly used for video conferencing, multi-class.
Microcontroller Unit; MCU), also known as a Single Chip Microcomputer) or single-chip microcomputer, is the frequency and specifications of the central processor to do appropriate reduction, and memory, counter, USB, A/D conversion, UART, PLC, DMA and other peripheral interfaces, and even LCD driver circuit are integrated on a single chip, forming a chip-level computer, for different applications to do different combination control.
1, for example, for 6-10 layer memory module PCB design, choose 10/20mil (drill/pad) pass hole is better, for some high-density small size boards, you can also try to use 8/18Mil pass hole. Under the current technical conditions, it is difficult to use a smaller size of the hole (when the hole depth exceeds 6 times the diameter of the hole, it is impossible to ensure that the hole wall can be uniformly plated with copper); For the power supply or ground wire hole, you can consider using a larger size to reduce the impedance.
2, in the range of ravg 0~ 0.08m, the output power increases first and then decreases with the increase of coil turns; In the ravg range of 0.08~ 0.4m, output powerThe rate decreases first, then increases and then decreases with the increase of coil turns. For a fixed operating frequency, the quality factor Q mainly depends on the shape and size of the coil and the material used. Standard coil technologies (such as wire winding coils and PCB coils) generally specify quality factor values.
3, wireless charging PCB, different functions, the required components are different. The required components are: resistor, capacitor, resonant capacitor, resonant coil, MOS tube, control chip, protocol chip.
4, control chip: manage the entire wireless charging process, including voltage regulation, power control, communication, etcFunction. Power amplifier (PA) : Increases signal strength in order to transmit energy efficiently. Oscillators and modulators: Generate high-frequency AC signals for wireless transmission. Coils: Used to generate or receive electromagnetic fields, are a key part of wireless charging.