How to improve the power efficiency of LED electronic display

Time:2018-10-29 Views:338

We all know that LED electronic display is driven by electricity. We can say what effect the product can achieve. On the one hand, the product quality.

On the other hand, it‘s not whether the power supply‘s efficiency is sustainable or not.What about improving the efficiency of LED power?Here are 8 tips

Qiao.

1. The main current loop PCB should be as short as possible :LAYPCB‘s experience and layout is nothing, and the quick way is to see more of dachang‘s works.

2. Optimize transformer parameter design: reduce eddy current loss caused by ringing.This is more difficult, should master electromagnetism foundation knowledge first, design reasonable change

Pressure, the most important thing is patience, even if the thought of improving efficiency 0.5%, to try.

3. Reasonable selection of switching devices: this is the balance of cost and performance, what kind of customer requirements, what kind of devices, but reasonable.Such as

For efficiency, there is no doubt that COOL MOS, low VF output diode.

4. If the EMI optimization design is adopted, this part is more detailed and mainly experienced.Price of LED electronic display screen

5. The selection of high-efficiency top-up structure is the beginning of scheme selection, such as PWM and QR PFM. When the client puts forward the efficiency requirement, it should be evaluated

Evaluate what kind of expansion is selected.

6. Select good electrolytic capacitance many people ignore this, and the electrolytic loss is very large.

7. On the premise of the design efficiency of partial power consumption, consideration should be given to the fact that many chips have HV startup pins at present, and the startup current is getting lower and lower

The point is to know more about the new device, of course, and the external circuit lossless start, I think is not suitable for LED drive.

8. The L6562D application document of the chip auxiliary power supply optimization point out that 15V is the best, but LED is generally the wide voltage output, so

My choice is to add a level of linear stabilization to make the chip work at 15V to reduce the loss.

The above 8 tips are summarized in the daily work of liansen optoelectronics, which is expected to be helpful to LED manufacturers.[LED electronic display screen manufacturer]