I think we all have heard of the constant voltage light source and current light source. But what is constant voltage light source and current light source? I will give you some tips to tell them:
1) Constant voltage source power in the permitted load, the output voltage is constant, and will not change with the load, usually used in low-power LED modules, low-power LED strips.
2) Constant current source power supply in the available load conditions, the output current is constant, and will not change with the load, typically used in high-power LED products and also used in the high-end low-power LED products.
If you want to lengthen the service life of LED products, it is very important to select LED power supply, and the LED constant current source power supply is the best choice.
Normally, common people do not know how to distinguish the constant voltage light source and current light source. Here I will give you some practically tips of distinguish.
Get a LED power supply and find brand-name parameter. Find out the key parameters of output voltage: if the nominal voltage is a constant value, it is a constant voltage source. If it is a range value, it is a constant current source.
For example: it has a power supply output voltage is 12V, and we are sure that this is a constant voltage source, if it is 30-70V nominal it, then this must be a current power light source. Do you think this approach is practical?
