What is the role of the Y capacitor in the charger?

by:MOSO     2020-02-15
If the charger meets the inferior charger during charging, there will be spontaneous combustion for no reason, explosion of the mobile phone, and even electric shock during charging, causing personal injury. All this stems from the quality problem of electronic components in the charger. The mobile phone charger y capacitor is used for common mode filtering. It is connected between L to ground or N to ground to filter out the common mode signals of L to ground or N to ground. The y capacitor is usually used symmetrically, the main functions are bypass; Decoupling; Filtering; Energy storage. There is a 400v withstand voltage capacitor at the primary end of the input force, which is the main filter capacitor to filter out the clutter after the rectification of the mains, so that the latter circuit can obtain a more stable DC sine wave, only with less clutter can the circuit work better and stably. As for the capacitor with a 400v withstand voltage value, after the switching circuit works, there will be a voltage drop of more than 300 volts across the capacitor, in addition, the peak voltage at the moment of power-on, so if the withstand voltage value is too small, it will affect the capacitor burst, and the output capacitor chooses the appropriate withstand voltage value depending on the size of its output voltage, for example, 5 v, The withstand voltage value is 10 v, and the capacitor is also a filtering effect, so that the charger outputs a stable direct current. As for the size of the capacity, the capacitor with large withstand voltage in front is generally selected 47 ~ 470 uF, output capacitance is generally 100 ~ 1000 uF, in principle, the larger the capacity, the better, but in fact, the larger the capacity, the larger the leakage current, and the y capacitance will pass through AC to block DC. Therefore, we should choose a good quality charger when charging our mobile phone. And the quality of y capacitor is good or bad, the quality of direct charger. As the y capacitor in the mobile phone charger, quality assurance is very important. When purchasing the y capacitor, the selection must have the certification of the safety inspection organization and the safety certification of the industrial countries. The general products have the certification mark. Mobile phone charger y capacitor, y capacitor, jec y capacitor, y capacitor mobile phone charger y capacitor is used for common mode filtering. In principle, the larger the capacity, the better. However, in fact, the larger the capacity, the greater the leakage current, and the y capacitance passes through AC to DC. Therefore, when we charge our mobile phone, we should choose a charger with good quality, while the quality of y capacitor is directly the quality of the charger. For more charger information, please pay attention to the charger manufacturer, Shenzhen moso Technology Co. , Ltd! (The above data are collected from the network)
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