The characteristics of LED street light materials determine that it is greatly affected by the environment. For example, if the temperature changes, the current of the LED will increase, and the voltage will increase, and the current of the LED will also increase. Exceeding the rated current for a long time will greatly shorten the service life of the LED lamp beads. The constant current of the LED street light drive power supply is to ensure that its operating current value remains unchanged when environmental factors such as temperature and voltage change. Now please let us analyze the relationship between the working voltage and current of LED street light / LED flood light in details for you.

1. Working voltage of Led driver(Led power supply)

Generally, the working voltage of LED street lighting is 3.0-3.5V. But, after testing, most of them work at 3.2V range, so it is more reasonable to calculate according to 3.2V working voltage. Obviously, total voltage of N lamp beads in series is equal to 3.2*N strings.

2. Constant current accuracy from Led driver

There is poor constant current accuracy from some led power supplies on the market. For constant current solutions such as popular recommended solutions on the market, the error reaches ±8%, and the constant current error is too large. The general requirement is ±3%. According to the 3% design proposal, the production of LED power supply needs to be fine-tuned to achieve ±3% error.

3. What is the most suitable working current of LED driver?

For example, the rated working current of a single 1W LED lamp bead is 350 mA. Sometimes, some suppliers use it up at the beginning and design with 350 mA. In fact, with such working current, its heat is very serious, which will influence the lifespan of LED chip and itself led driver. After many comparison tests, the reasonable but safe current is 320 mA. To minimize heat generation and allow more electrical energy to become visible light energy, it is green and safe working way.