1, if you are wireless charging, because there will be energy loss in the wireless transmission process, and then produce a certain amount of heat, there will be a phenomenon of wireless charging heat, this is normal. 2, in general, although it is normal for mobile phones to heat up while wireless charging, continued overheating may pose a potential danger. Therefore, it is crucial to maintain proper charging conditions and observe the temperature changes of the phoneImportant. 3, in summary, wireless charging mobile phone hot is a normal phenomenon, mainly caused by the working principle of wireless charging, energy conversion efficiency, mobile phone heat dissipation design and use of the environment and other factors. When using wireless charging, it is recommended to pay attention to the heat dissipation of the phone and avoid charging in a high temperature or an airtight environment to ensure the safety and performance of the phone.
4, wireless charging heating is a normal phenomenon, but there is a certain temperature range, generally marked in the manual, it is recommended to read the manual carefully before use. Wireless charging has a variety of use standards, you need to check the phone's support before buyingRecently, the 50W wireless second charging technology of the Mi 10 Supreme Commemorative edition has achieved a significant increase in wireless charging speed by optimizing the architecture, improving the conversion efficiency, using high-performance components and fine charging strategies, making it a leader in the field of wireless charging, and even exceeding some wired charging mobile phones. 2, Mi 10 Supreme commemorative edition with a starting price of 5,299 yuan shock debut, its highlights are not only the top camera, 120Hz hyperboloid flexible screen and Snapdragon 865 processor, but also the first mass production of 50W wireless second charging technology. Officially, 40 minutes, 4500mAh's large battery can be charged to full charge, wireless charging faster than the same power of wired charging.
3, Mi 9 Pro and Mi 10 Pro 40W and 50W wired charging, marking Xiaomi's acceleration in the field of wired charging. Mi 10 Supreme commemorative edition is to achieve 120W super power wired charging, through 4:2 high-power charging architecture, custom charge pump and butterfly double-string battery and other technological innovations, greatly improve the conversion efficiency, shorten the charging time.
In this circuit, is the wireless charge circuit step-down , inductor L1 and capacitor C1 wireless charge circuit step-down The resonant frequency is set to 1MHz. Because the circuit is in a resonant state, the no-load current is very small even if the receiving coil is not near the transmitting coil. At the receiving end, the resonance principle is also used to improve the efficiency of energy transmission. Schottky diode is used to rectify the signal, after filtering capacitor processing, to obtain direct current, and then charge the battery. Works in optimal conditionIn the state, the charging current can reach more than 0.6A.
The inductor L1 and the capacitor C1 have a resonant frequency of 1MHz, and because the circuit is resonant, the no-load current is small when the receiving coil is not near the transmitting coil. The receiving end also adopts the mode of resonance, which can maximize the transmission efficiency of energy, and the direct current is obtained by the filtered capacitor after the Schottky diode is rectified, and the charging current is above 0.6A. If the coil is made into a barrel shape, the transmission efficiency will be higher.
Wireless charging coil A6 three 3 coil - inductance 15uH. Inductive groupThis formula and the inductance definition formula: L=μ×Ae*N2/l. Where: L represents the inductance, μ represents the magnetic permeability of the magnetic core, Ae represents the cross-sectional area of the magnetic core, N represents the number of turns of the coil, and lm indicates the magnetic circuit length of the magnetic core. Empirical formula: L= (k*μ0*μs*N2*S) /l. Among them. μ0 is the vacuum permeability =4π*10 (-7).
Through the two inductors, the energy is transmitted coupled, and the alternating current received by the secondary coil is converted into direct current through the receiving conversion circuit, which directly charges the battery. Except wireless charge insideIs the circuit step-down? electromagnetic induction, capacitive coupling mode is also a common wireless charging method. In this mode, no inductor is required, but the electric field of the capacitor is used for energy exchange to achieve wireless charging.