Take Xiaomi mobile phone as an example, the solution that the charger has been broken when charging:
1, the charging head is broken (whether it is the original or it brand, the charging head is internal with resistance, capacitor step-down rectification, and then voltage regulation into 5V power supply, the advantage is small volume and large current, the current can reach 1-1.5A; The disadvantage is that the performance is not good, the voltage is unstable, and if the capacitor is broken down, it may damage the phone.
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2, the battery has failed, has not reached the nominal voltage and capacity, you can verify that the method is to plug the mobile phone into the computer or use the switching power charger (that is, the old big charger with USB interface) on the charge, if the constant power, then it is the problem of the original charger, on the contrary, if the fault is still, then the battery has failed.
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The charger (charger) can be divided into power frequency machine and high frequency machine according to the working frequency of the design circuit. The power frequency machine is designed based on the traditional analog circuit principle, the internal power devices (such as transformers, inductors, capacitors, etc.) are larger, and there is generally less noise when the load is larger, but the model has strong resistance performance in the harsh grid environmental conditions, and the reliability and stability are stronger than the high-frequency machine