Common 2 kinds of LED soft light with power supply

Common 2 kinds of LED soft light with power supply

LED flexible light strips can use different power sources according to the model. How much do you know about power supplies? Do you know the type of power supply and the different meanings of LED strips? Today we talk about the classification of LED soft lights with power supply.

Light strip power supplies have different classification methods according to different standards. This paper mainly expounds the classification according to different driving methods, which can be divided into two kinds of voltage regulation and constant current. The following sections will explain in detail.

According to the driving method, it can be divided into two categories

light strip

1.1 Regulated

a. The voltage change caused by rectification will affect the brightness;

b. Drive the LEDs with a voltage stabilizing drive circuit, and each string needs to add a suitable resistor to make the LED display brightness average for each string;

c. The voltage stabilizing circuit is not afraid of the open circuit of the load, but it is strictly forbidden to short-circuit the load completely;

d. When the parameters in the voltage regulator circuit are determined, the output voltage is fixed, and the output current changes with the increase or decrease of the load;

1.2 Constant current

a Attention should be paid to the large withstand current and voltage values used, which limit the number of LEDs used;

b constant current drive circuit is ideal to drive led, but the price is relatively high;

c The constant current circuit is not afraid of short circuit of the load, but it is forbidden to completely disconnect the load;

d The current output of the constant current drive circuit is constant, and the output DC voltage varies within a certain range according to the size of the load resistance. The load resistance is small, the output voltage is low, and the load resistance is large. higher output voltage.