It is the small unwanted residual periodic variation of the direct current (DC) output of a power supply which has been derived from an alternating current (AC) source. There are two AC contents, also […]

When current drawn exceeds the rating of the PSU, the protection circuit will be triggered to protect the unit against overload/overcurrent. Protections of overload/overcurrent can be divided into sev […]

According to the mains voltage of different countries, the output of TN-1500 inverter 110VAC version can be altered to 100/110/115/120VAC. In the same way, TN-1500 inverter 220VAC version can be chang […]

Some power supplies provide a “Power Good” signal when they are turned on, and send out a ” Power Fail” signal when they are turned off. This is usually used for monitoring and […]

MTBF (Mean Time Between Failure) and Life Cycle are both indicators of reliability. MTBF can be calculated by two different methodologies, which are “part count” and “stress analysis”. The regulations […]

Due to different circuit designs, MEAN WELL power supply’s input consists of three types as below:(VAC≒VDC)a.85~264VAC;120~370VDCb.176~264VAC;250~370VDCc.85~132VAC/176~264VAC by Switch; 250~370V […]

COM (COMMON) means common ground. Please see below:Single output: Positive pole (+V), Negative pole (-V)Multiple output (Common ground): Positive pole (+V1, +V2,.), Negative pole (COM)

In general there are two circumstances that will cause the power supply to shut down. The first one is the activation of the over-load-protection (OLP). To deal with this situation, we suggest increas […]