222 views Yuda Electronic (HK) Technology Co.,Limited. 2018-10-01
Before talking about this matter, let us first understand the principle of the phone charger heating. The components that the charger heats up are: high-voltage capacitors, switching tubes, high-frequency transformers, and the temperature of these three components is quite high. It is not difficult to reduce the temperature of these three components. Generally speaking, in the case of constant output current, the power of the high-frequency transformer is relatively large, and the temperature of the high-frequency transformer is much smaller. Of course, the heat dissipation of the switch tube is easier, just add enough heat sink to it. However, due to volume limitations, it is impossible to reduce heat generation. Therefore, the heat of the charger is inevitable.
Knowing the principle, it is easy to understand why the current charger is hot:
1. First, this is related to the current intensity of the charger output and the ambient temperature. With the popularity of smart phones, chargers are now getting higher and higher. The 500mA charger can’t meet the user’s demand for charging speed, so we see that the current common charger current is above 2A.
2. In addition to the current boost, the volume of the charger is also a key factor. In order to facilitate carrying, everyone tends to prefer a smaller charger. However, the volume becomes smaller, the heat dissipation performance is deteriorated, and the requirements for electronic components are also higher. In the case of a capacitor, the high-voltage capacitor is smaller and smaller in terms of maintaining the capacity, and is better in terms of withstand voltage and temperature, but if the withstand voltage is insufficient, the capacitor is broken. Insufficient temperature resistance will cause the capacitor to explode.
3. In addition, the high temperature of the charger has a great relationship with the switch tube of the charger. If the specification of the switch tube is low, then the current will pass and the heat will be more.
In fact, in theory, even if the charger is hot, it is difficult to explode. The official original charger is safely tested and put into production according to the standard. Of course, this refers to the genuine charger. The stability of the output voltage of the fake charger itself is not as good as the original charger, which will cause problems such as slow charging and serious heat generation of the charger. Spontaneous combustion explosions are more likely to happen, so you should try to avoid using chargers purchased from unofficial channels.
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