1, the charger output specifications do not match the mobile phone.
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The small power charger of the cottage, the current is not enough, will be pulled by the mobile phone, the charger repeatedly jumps between the start and pull, and the impact is easy to damage the charging IC.
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Too high output voltage exceeds the phone charging IC withstand voltage value, will also be damaged)
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2, the input voltage polarity is not correct or reverse: the standard excuse is generally more difficult to plug, the possibility of anti-this, but not high.
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3, surge impact: If the quality of the charger is not good, in the process of charging the mobile phone, as there is a large device near the grid to start or stop, resulting in grid impact.
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This superimposes a spike on the output voltage, similar to a lightning strike, resulting in damage beyond the IC limit.
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When the charger is plugged into the socket, the contact point is not in good contact with the spark, and it will have an impact.
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A good habit is to first plug the charger into the stable, in the charger data cable connected to the phone.
This may occur in the following situations:
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1. Slow charging speed: The charging speed is significantly slower, even if the original charger is used, it can not be quickly charged.
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2. Unstable charging: Intermittent charging will occur, and the charging indicator will be unstable.
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3. No charging response: After connecting the charger, the device does not have any reaction and cannot be charged.
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4. Excessive heat of charging: the device will become extremely hot when charging, and even overheat will occur.
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If the above situation occurs, it is recommended to go to Apple's official authorized repair point as soon as possible to repair or replace the charging IC.
Generally do not turn on, the power IC is to convert the battery power into the voltage power supply required by the parts of the phone that need electricity, such as the part of the audio IC power supply is broken, there will be no sound or no signal, in short, he to which part of the power supply problem, that part can not work.