Author: Site Editor Publish Time: 2023-04-12 Origin: Site
One of the highlights of the LED lighting industry is the development of LED lights. Under the influence of the global environment, LED light technology continues to advance and is increasingly welcomed by the market. Among them, the design and technological innovation of LED light power supplies is a key factor. In the following, we will introduce in detail some problems and solutions related to LED light power supplies:
Due to the characteristics of LED lighting materials, they are very sensitive to environmental changes. For example, when the temperature rises or the voltage increases, the current of the LED will also increase. Working beyond the rated current for a long time will significantly shorten the life of the LED beads. LED constant current power supplies can ensure that the working current of LED lights remains stable when environmental factors such as temperature and voltage change.
Some power supplies on the market have poor constant current accuracy, with errors up to ±8%. High-quality LED light power supplies should ensure that constant current accuracy is within ±3%. During production, the power supply needs to be fine-tuned to achieve this standard.
Generally speaking, the recommended operating voltage for LEDs is 3.0-3.5V. After testing, most LED lights work best at 3.2V. Therefore, when calculating the series connection of multiple LED beads, the working voltage of each bead can be set at 3.2V.
Taking an LED light with a rated working current of 350mA as an example, some manufacturers set the current at 350mA. However, in practice, the heat generated by the LED light is quite large when working at this current. After several experiments and comparisons, a current design of 320mA is more suitable, which can reduce the heat generation and convert more electrical energy into visible light energy.
To enable LED light power supplies to work within a wider input voltage range (such as AC85-265V), the series and parallel connection of LED beads on the lamp board is crucial. It is ideal to avoid using a wide voltage range and to separate the power supply into AC220V and AC110V. This ensures the reliability of the power supply.
Isolated power supplies are larger in size and generally difficult to install in LED lights. The cost-performance ratio of isolated power supplies is relatively low, so non-isolated power supplies are more popular in the LED lighting field. Non-isolated power supplies are smaller in size, making them easy to integrate into LED lighting fixtures. At the same time, non-isolated power supplies have a higher cost-performance ratio, making them more suitable for large-scale production. However, it should be noted that the safety performance of non-isolated power supplies is slightly inferior to that of isolated power supplies, so protective measures need to be fully considered during the design.
The life of an LED light largely depends on the quality of the power supply. To ensure the long life of LED lighting fixtures, power supplies need to use high-quality capacitors, inductors, and other key components. At the same time, the design must ensure that the power supply has over-temperature, over-voltage, and short-circuit protection functions. Proper heat dissipation design can also extend the life of the power supply.
Transient response refers to whether the power supply can quickly adjust the output voltage to maintain a stable output current when the input voltage or load suddenly changes. A power supply with
good transient response can improve the reliability of LED lights and reduce flickering caused by power supply issues
Electromagnetic interference is an issue that cannot be ignored for electronic products. LED light power supplies need to comply with relevant EMI standards to avoid interference with other devices. Proper filtering, shielding, and other techniques can reduce the electromagnetic interference level of the power supply.
Improving the efficiency of LED light power supplies is key to reducing energy consumption and heat generation. High-efficiency power supplies can provide more stable output for LED lights, ensuring the performance of the lighting fixtures. Optimizing power supply design and using high-quality components can help improve the efficiency of the power supply.
In summary, the design and technological innovation of LED light power supplies are key factors in the development of the LED lighting industry. By addressing the above issues, the performance, stability, and life of LED lights can be improved, thereby promoting the continuous development of the LED lighting industry.