Industry Information

Update October 16, 2020

You may think that the impact of omitting the power factor will result in only a slight error and/or that the power factor of an external adapter cannot be that bad. In fact, without power factor...

Update October 16, 2020

What is the power factor, the meaning of the power factor, the common method of improving the power factor?

First of all, to explain, usually we write "power factor", which is a number, is a coefficient, a coefficient not greater than 1. That is, the work that can be done, but it can't be done so much, and...

Update October 14, 2020

What is a constant current power supply and a constant voltage power supply adapter?

Common to all of the power adaptor and mobile phone chargers are constant voltage switching power supply, power adapter output dc voltage is fixed, the voltage change the floating range for the...

Update October 09, 2020

What is EMI and EMC in the power supply?

Many electronic products offered for sale are required to meet EMI and EMC (Electromagnetic Interference and Electromagnetic Compatibility) regulatory requirements. These requirements ensure that...

Update September 19, 2020

How long can I extend DC cable of the power supply?

Owing to line (voltage)-drop, we suggest the extension made from AC cable. In case DC cable extension is necessary, please consider Line-Drop leading to insufficient Vf so that the application may...

Update September 14, 2020

Is a definition of SELV from IEC61347 the same with IEC60950?

Is a definition of SELV from IEC61347 the same with IEC60950? No, they are different. SELV means the LED driver will use a safety isolating transformer with double or reinforced insulation and the...

Update September 08, 2020

The influence of DC output cables on power supplies?

The influence of DC output cables on power supplies? A longer dc output cable contributes to worse load regulation and worse power conversion efficiency. User applications often require a minimum...

Update September 04, 2020

Why do wall mount power supplies only meet Class II power?

Most wall plug in external power supplies are designed with only two input conductors (line and neutral) so the power supply can be plugged in either direction in a wall or power strip socket. The dc...

Update September 02, 2020

The role and application of the power adapter

First, the role of power adaptor The power adapter is a device that transforms, rectifies, filters, and stabilizes 220 volts AC power to output the power supply suitable for electrical appliances;...

Update September 01, 2020

Determine the service life of the power adapter

The life span of the power adapter is the same as the life span of a person. It is impossible to predict the exact number of years, but many big data analysis reports have the concept of average life...