qi standard wireless charging is working through the principle of electromagnetic induction, since it is a magnetic field cutting method will inevitably generate heat, different solutions in the heat of the problem of dealing with different ways.
1, the general use of metal heat dissipation method can reduce the heat transfer to the mobile phone, thus affecting the mobile phone charging power, is bound to increase the metal block on the circuit board or coil, somewhat similar to the notebook CPU plus copper tube heat dissipation.
2, or increase the active fan heat dissipation, use the fan to cool the motherboard and coil, can achieve the delay power reduction time. As long as the temperature on the NTC inside the phone does not reach the set critical point, it can keep the phone charging quickly.
3, one of the most important temperature control method is the framework design of the program, which involves the development and design of the more bottom layer, the excellent program has advantages from the working principle, such as the car is originally faster than the bicycle, even if the bicycle adds a motor or can not catch up with the car. Therefore, a good scheme architecture, the optimization of the entire circuit, the switching frequency control of the components, the construction of the drive circuit, the precise control of the oscillation frequency, the performance selection of the components, and so on. After these optimizations, the solution basically does not have a hot problem, and the temperature is only a little higher than room temperature.