Inputs for LED drive power include high-voltage power frequency AC (ie, mains), low-voltage DC, high-voltage DC, low-voltage high-frequency AC (such as the output of electronic transformers). There are two kinds of LED driver power supply in the process of operation. Do you know which two are? Details are as follows:

 


One is a constant voltage source for multiple constant current sources, each of which supplies power to each LED individually. In this way, the combination is flexible, and all the LED faults do not affect the work of other LEDs, but the cost will be slightly higher.

The other is direct constant current power supply, which is the driving mode used. The LEDs operate in series or in parallel. Its advantage is that the cost is lower, but the flexibility is poor, and it is necessary to solve a certain LED failure without affecting the operation of other LEDs. These two forms coexist for a while. Multi-channel constant current output power supply mode will be better in terms of cost and performance. Perhaps it is the mainstream direction in the future.

The output of the LED driver is mostly a constant current source that changes the voltage as the LED's forward voltage drop changes. The core components of the LED power supply include a switch controller, an inductor, a switching component (MOSfet), a feedback resistor, an input filter component, an output filter component, and the like.

There are two kinds of LED driver power supply in the process of running. Do you know which two are now? That's right, it's the two described above. If there is a need for LED drive power method, please call Zhongfu Optoelectronics Consulting.