If the charger encounters a poor charger during charging, it will cause spontaneous combustion, explosion of the mobile phone, or even an electric shock during charging, which will cause injuries. This all stems from the quality of electronic components in the charger. The y capacitor of the mobile phone charger is used for common-mode filtering. It is connected between L to ground or N to ground to filter out the common-mode signal of L to ground or N to ground. The y-capacitor is usually symmetrically used, and the function is mainly bypass; Decoupling; Filtering; Energy storage.
There is a 400V voltage capacitor at the primary end of the force, which is the main filter capacitor, filtering out the clutter after the mains rectification, so that the back circuit can get a more stable DC sine wave, only the less clutter, the circuit can be more Good stable work, as for the capacitor selection 400v withstand voltage value, after the switch circuit works, there will be more than 300V voltage drop across the capacitor, plus the instantaneous peak voltage of the power, so if the pressure value is too small, the capacitor will appear. Burst, and the output capacitor depends on the output voltage size to select the appropriate voltage value, such as 5v is the pressure value is 10v, the capacitor is also a filter, so that the charger output smooth DC, as the size of the capacity, front pressure The large capacitor is generally selected 47~470uF, and the output capacitor is generally 100~1000uF. In principle, the larger the capacity, the better. However, in reality, the larger the capacity is, the greater the leakage current is. The y capacitor passes the AC blocking DC. So we have to choose a good charger when charging the phone. The quality of the y capacitor is good or bad quality of the direct charger.
As a y capacitor in a mobile phone charger, quality assurance is very important. When selecting a y capacitor, it must be certified by a safety inspection agency and an industrial safety certification. The general product has a certification mark.
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The y capacitor of the mobile phone charger is used for common mode filtering. In principle, the bigger the capacity is, the better. But in fact, the larger the capacity is, the greater the leakage current is, and the y capacitor passes through the AC resistance. Therefore, when we charge the mobile phone, we must choose a good quality charger. , And the quality of the y capacitor is good and the quality of the direct charger.
More charger information, please pay attention to the charger manufacturers, Shenzhen Cable Source Technology Co., Ltd.!
(The above information is collected from the network)