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The classification of LED drive power


The classification of LED drive power. What is the classification of LED drive power? How to distinguish LED drive power? It can be sorted by driver method, also can be sorted by power installation location classification, including both external and built-in power supply.

What is the classification of LED drive power? How to distinguish LED drive power?

It can be sorted by driver method:
(1) Constant current type
a. The current output by the constant current drive circuit is constant, and the output DC voltage varies within a certain range with the size of the load resistance. The load resistance is small, the output voltage is low, and the load resistance is larger The higher the voltage;
b. The constant current circuit is not afraid of load short circuit, but it is strictly forbidden to completely open the load.
c. The constant current drive circuit is ideal for driving LEDs, but the price is relatively high.
d. It should be noted that the maximum withstand current and voltage value used, which limits the number of LEDs used;

(2) Voltage regulator type:
a. After the parameters in the voltage regulator circuit are determined, the output voltage is fixed, and the output current changes with the increase and decrease of the load;
b. The voltage-stabilizing circuit is not afraid of open circuit of the load, but it is strictly forbidden to completely short-circuit the load.
c. The LED is driven by a voltage-stabilized driving circuit, and each string needs to be added with an appropriate resistance to make each string of LED display brightness average;
d. The brightness will be affected by the rectified voltage change.
(3) Pulse drive
(4) AC drive

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Power installation location classification:

The drive power can be divided into external power supply and internal power supply according to the installation location.
(1) External power supply
As the name implies, an external power supply is installed outside. Generally, the voltage is relatively high, and if it is a safety hazard to people, an external power supply is required. The difference from the built-in power supply is that the power supply has an outer shell, and street lamps are common.
(2) Built-in power supply
It is to install the power supply in the lamp, generally the voltage is relatively low, 12v to 24v, there is no hidden danger to people. This common one has a bulb light.

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