MEAN WELL PWM series vs ELG series
Not all LED drivers are created equally, they are designed to serve distinct purposes across a wide range of applications. The specific properties of LED drivers such as ensuring optimal operation, durability, energy efficiency and robust structure to protect against damages all come into the design consideration of the device.
When selecting the right LED driver, it’s important to consider its dimming capabilities, output type and housing. In this article, we compare the two popular MEAN WELL LED driver products, the PWM series and ELG series.
MEAN WELL PWM-120 Watt Dimmable LED Driver
The PWM series are constant voltage LED drivers with a regulated duty cycle at the output. Ranging from 40 to 200W variants, they are equipped with a 3-in-1 dimming input to adjust the brightness and can be controlled using DALI. They can handle input voltages ranging from 90 to 305V AC and are ideal for powering LED strips due to their PWM output. For added safety, the PWM series complies with the 2/II class requirements, ensuring an extra layer of protection against electrical shocks.
MEAN WELL ELG-100 Watt Dimmable LED Driver
The ELG series is a versatile option that can be used for both constant voltage and constant current output. It is designed for broader outdoor linear lighting solutions due its design of metal housing and IP67/IP65 ingress protection level. Available from 70 to 300W variants, these LED drivers can operate from 100 to 305V AC, making it suitable for larger applications.
PWM Output vs Amplitude Dimming
The difference between the PWM series and ELG series is how the dimming is controlled. The PWM series uses a Pulse Width Modulation (PWM) output, which works by very rapidly turning the output voltage switches on and off (pulsing). This alters the duty cycle and controls the brightness of the LEDs.
The ELG series LED drivers use amplitude dimming, where the amplitude of the output current is reduced to achieve dimming. This method can work well but may lead to “dead travel”, resulting in uneven rate of dimming. To learn more about dead travel click here.
Housing and IP Rating
Many LED drivers can have a IP67, IP66 or IP65 ingress protection rating. IP ratings indicate the level of a driver enclosure’s protection against water and dust.
The PWM series drivers have a IP67 plastic enclosure, making them ideal for indoor environments where they might be exposed to moisture. It’s important to note that the plastic housing is not UV-stabilised, which means it may degrade over time when exposed to direct sunlight.
The ELG series are housed in sturdy, metal enclosures with an IP65 rating, allowing for both indoor and outdoor use. The metal housing provides high durability, with the case built to withstand knocks and bumps. Although metal housings are resistant to UV degradation, it is essential to avoid mounting the driver in direct sunlight. Doing so can cause internal temperature of the LED driver to rise and exceed safe limits, potentially leading to failure and void of manufacturer’s warranty.
Despite a few differences in the dimming methods and housing, the MEANWELL PWM series and ELG series LED drivers are both reliable and efficient LED solutions. Contact ADM team on 1300 236 467 for help on finding the right LED driver for your needs.