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LED Lamp And Power Supply Used In Engineering-2

LED lamp and power supply used in Engineering

What is a ripple

Ripple refers to the AC component other than the DC component of DC output voltage. In general, the frequency of AC components is usually greater than 100Hz or even tens of MHz, and ripple can not be eliminated.

Does the ripple affect the life of LED?

The life span of LED depends on the size of ripple and the number of branches. When the number of LED on the branch is constant, the larger the ripple, the shorter the life of LED, the more the number of LED on the branch, the smaller the effect of the ripple on the LED and the longer the life span.

Does the ripple affect the life of LED?

The life span of LED depends on the size of ripple and the number of branches. When the number of LED on the branch is constant, the larger the ripple, the shorter the life of LED, the more the number of LED on the branch, the smaller the effect of the ripple on the LED and the longer the life span.

For example, the power output voltage is 12V, the ripple peak is 500Mv, and the number of LED on each branch is 4.

1. Under the condition of no ripple, the voltage of each LED is 12 to 4 =3V.

2. After superimposed ripple, the voltage of each LED is (12V 0.5V) 4 =3.12V.