Nowadays, there are more and more mobile phones with wireless charging, but from the current use of consumers, there is a common problem - charging heat. After charging the mobile phone on the wireless charging seat for a period of time, the mobile phone will become very hot, what is the reason?
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More and more mobile phones are on the market with wireless charging. However, from the current use of consumers, there is a common problem - charging heat. After charging the mobile phone on the wireless charging seat for a period of time, the mobile phone will become very hot, even hot.
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In fact, there are several fundamental reasons for mobile phone wireless charging fever:
1. Choice of program.
This is the most fundamental reason, different solutions have their own characteristics, whether it is in charging efficiency, mobile phone compatibility, or in the disconnected, temperature control and other aspects are different, some manufacturers in consideration of the cost, will use some relatively cheap solutions, abandon some peripheral circuits and some functions.
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2, temperature control circuit.
General wireless charging program will have a temperature control circuit and NTC thermistor, this function is mainly to prevent the circuit in the process of working to generate too much heat, burn components, etc., can also control the power components after generating too much heat, reduce the power, thereby reducing the temperature, this function is very important.
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3, the choice of heating components.
qi standard wireless charging is originally the use of electromagnetic induction, generate current, promote the circuit work. At the transmitting end, the inductor (coil), the resonant capacitor and the control chip together form an LC oscillation circuit, by oscillating in the frequency range of 110-205kHz, the receiving end will generate current due to the changing magnetic field, so as to charge the mobile phone. Therefore, if the appropriate components are not selected in the circuit, the error of each component will affect the entire performance, and too much current consumed on the components will generate too much heat.
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4. The phone problem
The battery protection temperature set by the mobile phone system is not the same. During the operation of the mobile phone, the system detects the temperature from time to time. Once the temperature exceeds the set value, for example, it begins to reduce the CPU frequency, causing a stall, or prompting a temperature alarm. The same is true for charging, such as iPhone wireless charging, when the shell temperature is about 30 ° C, the system begins to reduce power. That's why the wireless charging speed of Samsung phones is slightly faster, but the temperature of the phone feels a little higher than that of Apple phones.