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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.

Dimming Range Customization with TCI DC MINIJOLLY 1-10V LED Driver & Further Discussion on 0/1-10V

This video starts off to demonstrate how to use the Min-Trim option of the DZ1G1TEN to set the Dimming Range of a Lighting Fixtures that is driven by a 1-10V Dimmable LED Driver. By using the Min-Trim option to set the Lowest Light Output between 0.8V - 3.5V, the result is to have the overall lighting range mapped from the Maximum (10V) to the New Minimum Voltage level: The lower the Minimum Level, the wider the dimming range.

We then continue to show that if we continue to adjust the Min-Trim downward, we are able to use the DZ1G1TEN to control the TCI driver (DC MINIJOLLY model # 122400) so that it switches off the light (Dim-to-Off feature). However, we also point out that for the < 1V control voltage range, such kind of behavior is not always guaranteed and is highly subject to the individual driver manufacturers' own interpretation of what "Minimum Light Output" means. This, in turn, explains the inconsistency of many 0-10V dimming devices as experienced in the market.

Furthermore, from the power meter measurement, we highlighted that although there is no light output from the driver (Dim-to-Off), the driver continues to operate and is still consuming a certain amount of power. The appearance of switching off the light by the dimmer should not be mistaken as actually cutting off the AC power to the driver (or switching off the driver). 

In fact, feeding 0V to the control port is essentially the same as shorting the DIM+/- terminals, which is not recommended for prolonged operation. Hence, our suggestion is to keep the minimal light output as a way to remind of proper AC power-off mechanism to the LED driver instead. Thus, in 0/1-10V applications, we are always reminded of using a separate On/Off switch or a Power Management Unit to cut-off the AC power to the LED Driver. 

Note that the TCI DC MINIJOLLY LED Driver # 122400 can be configured as either a Constant Current and Constant Voltage LED driver. Although we only showed the Constant Current mode in this video, we can also achieve same performance when the driver is configured as a Constant Voltage mode (typically for low power LED strip connection).