1, for example, for the 6-10 layer of memory module PCB design, the choice of 10/20mil (drill/pad) hole is better, for some high-density small size boards, you can also try to use 8/18Mil 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, ravgIn the range of 0~0.08 m, the output power increases first and then decreases with the increase of coil turns. In the range of ravg 0.08~ 0.4m, the output power decreases first and 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, resonanceCoil, MOS tube, control chip, protocol chip.
4, control chip: manage the entire wireless charging process, including voltage regulation, power control, communication and other functions. 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.
5, other it has no brand of direct output two power supplies, no charging detection signal line only about 150 MA working current, although not hot, charging speed can beThink and cicada. Wireless charging technology Texas Instruments technology is very mature, due to the domestic promotion of few manufacturers will invest a lot of money in technology, your charging is slow to find the answer, Tomston is good price is not cheap, domestic buy less.
First of all, the plug of the Apple magnetic wireless charger is less copper wire, do not continue to charge. Secondly, you can call Apple's after-sales phone, as long as it is free to replace during the warranty period. finallyIf it is not under warranty, replace it with a new charger plug.
It may be that the contact between the magnetic charging head and the charging cable is poor or the interface is damaged, and a new magnetic charger needs to be updated. It may also be that the charging port of the device is blocked by foreign objects, resulting in failure to charge. Try to clean the charging port. It may also be that the device charging port or charging power chip is faulty, and it is necessary to carry the device to the after-sales inspection and replace the corresponding components. Magnetic charger as a new charger, it is mainly the use of magnets can absorb magnetic metal characteristics.
Remove iPhone case sometimes iPhone protectionThe case is too thick will also lead to wireless charging, then you can try to remove the iPhone protective case, and then put back on the wireless charging board to charge.
For magnetic wireless charging, the traditional phone case may affect the magnetism, but the magnetic design of the iPhone 12 means that the ultra-thin or with magnetic function of the phone case will likely become the new darling of the market.
If you just say that the charger without a line is the kind of socket, it must be the interface to correspond! What are the parameters related to the charging power of wireless charging technology? At present, the wireless charging distance of the QI standard is more popularMm, charging power 5W, but some separately developed wireless charging standards can reach 20W LG mobile phone support wireless charging technology? LG phones do not currently support wireless charging technology.
Wireless charging does not damage the phone battery. This is a common misconception, but it's not true. However, those who argue that wireless charging can damage smartphone batteries point out that wireless charging generates more heat than wired charging, which can put a bigger strain on the batteryStress. While this is true to some extent, the heat generated by wireless charging can be controlled by your smartphone and won't damage your smartphone battery.
The harm is relatively small can be ignored, although wireless charging technology has appeared in the 19th century, but the popularity of mobile phone applications is not high. It uses the principle of "magnetic resonance" to allow the wireless charger to transmit an electric charge through the air to the phone's battery. Many wireless chargers on the market do not indicate radiation values, and electromagnetic radiation standards for wireless chargers have not yet been introduced.
Wireless charging: Can really hurt your smartphoneThe battery? Wireless charging technology has gradually become standard in smartphones, including brands such as Samsung and Apple. Still, its acceptance has not soared as much as expected. A common concern is whether wireless charging will have a negative impact on battery life. At first, the introduction of wireless charging aroused great interest among users. While there doesn't seem to be any evidence that wireless charging degrades smartphone battery performance faster than wired charging, there are some tangible benefits. For example, the wear and tear of the charging port is reduced, which usually leads to failure and needs to be repaired, so wireless charging is useful for hotels and carsIt is ideal for public charging facilities in restaurants, restaurants and trains.
Cheap wireless charger doesn't hurt your phone. Wireless charger uses the latest wireless charging technology, by using the alternating magnetic field generated between the coils, the transmission of electrical energy, inductive coupling technology will become a bridge connecting the charging base station and equipment. The charger is the use of high-frequency power technology, the use of advanced intelligent dynamic adjustment charging technology. The charger (charger) can be divided into power frequency machine and high frequency machine according to the working frequency of the design circuit.
We redefine the damage to the mobile phone at this point, the mobile phone lithium battery cycle life is limited, that isIn fact, it is the rear windshield fog removal button, but now many models directly omit the rear English, directly is an icon.
Small magnets are the key point of this experiment, they both produce a magnetic field, and act as a conductor, so that the copper coil and the battery's positive and negative connection, even if the copper coil generates current, this time the energized copper coil according to the law of electromagnetic induction and the right hand rule, the magnetic field.