Rectifier circuit is the most common circuit in the electronic circuit, from the simplicity of the circuit, cheap point of view, choose Samsung chip capacitor input filter is always the best choice, for the mains input of the electronic circuit how to correctly select Samsung chip capacitor so that it can meet the requirements of the circuit, but also the lowest cost. If the rated current and life of the chip electrolytic capacitor are considered, it is necessary to know the ripple current that the chip electrolytic capacitor can withstand and the expected life of the Samsung chip capacitor.

Therefore, a chip electrolytic capacitor with a rated voltage of 400V should be selected or two chip electrolytic capacitors with a rated voltage of 200V (which can also make 250V) should be used in series. It should be noted that although the rated voltage of the chip electrolytic capacitor is about 10% rich, in the above applications, from the product safety point of view is not allowed to use the rated voltage of 300V or 350V chip electrolytic capacitors.

For the rectifier filter circuit with power factor correction, when the output voltage of the power factor correction circuit is 380V, the rated voltage of 400V electrolytic capacitor can be selected, and when the output voltage of the power factor correction circuit is higher than 380V, only the rated voltage of 450V chip electrolytic capacitor can be selected.

Usually, the capacity of Samsung chip capacitor at the input voltage 220V±20% according to the output power selection is: not less than 1μf per watt (i.e. : ≥1μf/W), the input voltage 85V~265V (110V-20%~220V+20%) input according to the output power selection is: not less than per watt (3-4) μf (i.e. : ≥ (3-4) μf/W). In order to limit the output voltage ripple of the rectifier filter, it is very important to correctly select the Samsung chip capacitance. Keywords: chip inductor, Samsung chip capacitor, chip tantalum capacitor, chip resistor, power inductor, chip electrolytic capacitor