What are the classifications of LED power supplies? Nov 19, 2021

The LED driving power supply is a voltage converter that converts the power supply into a specific voltage and current to drive the LED to emit light. Generally, the input of the LED driving power supply includes high-voltage power frequency AC, low-voltage DC, high-voltage DC, low-voltage high-frequency AC, etc. The output of the LED driving power supply is mostly a constant current source that can change the voltage with the change of the forward voltage drop of the LED.

Since the performance and conversion efficiency of 0-10v LED power supplies of various specifications are different, choosing a suitable and efficient LED power supply can truly reveal the high-efficiency characteristics of LED light sources. Because the low-efficiency LED power supply itself needs to consume a lot of power, the energy-saving characteristics of LED cannot be highlighted in the process of powering the LED tiangmg power supply. In short, the stability, energy saving, and life span of LED power supply play an important role in LED work.

 LED driving power supply

LED power supply can be divided into two categories according to the driving mode

A. Regulated type:

1. After the voltage regulator circuit determines the various parameters, the output is a fixed voltage, but the output current changes with the increase or decrease of the load

2. Although the voltage regulator circuit is not afraid of load opening, it is strictly forbidden to short-circuit the load completely

3. The voltage change after rectification will affect the brightness of the LED

4. To make each string of LEDs driven by a voltage stabilizing circuit show uniform brightness, you need to add a suitable resistance.

B. Constant current type:

1. The constant current drive circuit is ideal for driving LEDs, but the disadvantage is that the price is higher.

2. Although the constant current circuit is not afraid of the load short circuit, it is strictly forbidden to open the load completely

3. The output current of the constant current drive circuit is constant, but the output DC voltage varies within a certain range with the load resistance.

4. It is necessary to limit the number of LEDs used, because it has the maximum withstand current and voltage value

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