How to choose a suitable power supply for LED signage

Wu Weiqiang / GZMW

There is a tendency among customers of LED signage to select power supplies with low voltage but high current for their applications (e.g. the RSP-320-5) because of the driving voltage of the LEDs. Generally speaking, the operating voltage is 2.8V -3.3V for white light LEDs, 1.8V-2.2V for red light LEDs, 3.0V-3.2V for blue light LEDs, 2.9V-3.1V for green light LEDs and 1.8V-2.0V for yellow light LEDs, respectively. As a result, many LED signage companies choose 5V models as their main supply source when using standard power supplies.

However, most of the supply voltage for LED signage will trend towards 4.2V/4.5V in the future, thanks to technological innovations in LEDs and better efficiency of driver ICs. The new generation of the RSP series, including the RSP-200/320/500, classifies 2.5V, 3.3V, and 4V as standard models as MEAN WELL has expected the market trend as well as utilizing past experience in the LED signage applications, not only meeting more demands from the customers but also reducing modification requests.

With a rise in the LED signage leasing market, rental LED signage have been widely put to use for hotels, stages, KTV, hall, video conferencing, etc. owing to the advantages of a smaller pixel pitch, lighter weight, slimmer mechanical configuration, making them easy to carry and set up. The UHP-200/350/500 series are ideal for display applications requiring small size and low profile, especially rental LED signage, these series also provide an alternative choice for customers who are looking for high-quality standard power supplies of the LED display.
Finally, the company would suggest using products treated with conformal coating for outdoor use as LED signage being exposed to diverse and hostile environments with dusty, highly humid, damp or wet conditions that could affect of the power supplies or damage the power supplies in the worst case if there is no special treatment. Power supplies are usually considered as a key component in a system, we would also recommend choosing products with 5G vibration resistance when used in vibration environments.