Output Derating (Please refer to the spec. of each machine)

    (1) Output-Temperature: We need to reduce the output power depending on the operating temperature and the direction that the S.P.S. is allocated. Example: If the S.P.S. is vertically installed, output power can be 100% between 0 ~ 50℃, and between 50 ~60℃ the output power should be derated. At 60℃ we need to reduce the output power to [...]

    Read More

    What is Power Factor? Input current/power factor explained

    It is common in switching power supply designs to connect a bulk capacitor right after the bridge rectifier. This leads to charging of the filtering capacitor at the peaks of the input sine wave. Apparent power becomes high due to high RMS current and this leads to low PF. Current meters with “True RMS” function [...]

    Read More

    Switching power supply input voltage / frequency explained

    Switching power supply has been used in various field applications all over the world. Depending on type of product, input source of either alternating current (AC) or direct current (DC) is acceptable. Prior to operation of the power supply, users should confirm the following: the type of input voltage (AC or DC), the range of [...]

    Read More

    How to select a suitable Switch Mode Power Supply?

    a. To increase the reliability of the S.P.S., we suggest users choose a unit that has a rating of 30% more power than actual need. For example, if the system needs a 100W source, we suggest that users choose a S.P.S. with 130W of output power or more. By doing this, you can effectively boost [...]

    Read More