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Besides energy saving, controllability is the next highly expected feature of LED Lighting over Traditional Lighting. However, such a control aspect seems to be missing in daily applications. Since 2015, we've been developing & marketing Phase Dimmers* and related products to address LED dimming control

Driven by our project field experience, we developed a new type of Tunable White control using Phase Dimming & 0-10V technologies, which gives our Tunable White Controller (DZ1G300TUNE) & Dynamic Lighting Controllers (DZ2G300TUNE_TOGG / _PUSH). It's our goal to lower the technical and costs barriers for different Circadian Lighting or Commercial applications that desire Multi-Purpose Lighting.

* Our 450W / 220-240Vac Single Live-wire Operational Trailing-edge LED Phase Dimmers released to market includes DZ2G450DIAL & DZ1G450CAPS (2015), DZ3G450DIAL (2017), DZ4G450MULT (2018). In 2017, our DZ3G450DIAL was listed as a SORAA® Compatible dimmer. In Q2 2021, an Enhanced version of DZ3G450DIAL has been available.

In this Application Video Library, we shared a number of interesting topics on LED dimming or how our products can be applied in different scenarios.

Multi-Power LED Driver and Buzz Sound from 1-10V Control

Multi-Power LED Drivers come with a set of selectable constant output currents and work within a wide output voltage range; such feature enables installers to use it with different lighting fixtures without wasting resources for searching for the matched LED drivers for the particular lamp loads on-hand, which helps them saving their project time greatly. It’s also common for the multi-power LED drivers to come with 1-10V dimming control interface; thus the multi-power LED drivers are recommended for field installation or replacement projects and for those, who would like to implement a dimming function to their existing fixtures.

In the video, we use the LCM series (LCM-25, LCM-40, LCM-60) from Meanwell (www.meanwell.com) and the DZ1G1TEN (1 - 10V Controller) from Legend Tech DIMEZE™ to demonstrate how easy it is to achieve dimming function with two downlights with very different electrical specifications. We use the same LCM-25 to drive a Philips 5W downlight and a no-name 12.5W downlight and make them dimmable with our 1-10V controller. We also demonstrate the Minimum-Trim option setting from DZ1G1TEN and highlight the common pitfall of mixing the DIM+ and DIM- connection, which results in no dimming effect in 1-10V control.
 
In the second part of the video, we connect the DZ1G1TEN with the PCM-60-24, which is a 60W / 24V constant voltage driver for LED strip light from Meanwell. We point out that the audible buzz sound does happen when the 1-10V dimmers are connected to some LED drivers; we also connect the same 24V strip and dimmer to another 24V LED driver from a different manufacturer for comparison. Although it’s very simple in design, we emphasize the importance of getting the appropriate product certification for the 1-10V dimmers (DZ1G1TEN CE Test: EN55015:2013+A1:2015, EN61547:2009, EN610003-2:2014, EN610003-3:2013) and proper dimmer-driver compatibility evaluation prior-to-purchase. At the end of the video, we repeat the importance of not mixing the 24V LED driver with 12V LED strip light, which may cause fire hazard!