Abstract
Next generation solid state lighting enables unlimited control of light and serve much broader functions beyond the basic lighting for illuminance. The emerging lighting for productivity, well-being, healthcare, and growth have revolutionized the scope of lighting. To empower this unlimited controllability, a multi-channel tunable power-electronics driver is essential but has not been satisfactorily addressed so far. Existing solutions are lossy, large, and expensive, due to introduction of additional buck power conversion stages. This paper proposes a time-division multiplexing (TDM) LED driving system which eliminates those buck stages. The proposed design can directly pair with off-the-shelf pulse width modulated (PWM) controllers and since it inherits entire feature sets, it can achieve low loss at standby and at dimmed condition. The simple analog implementation avoids usage of expensive DSPs/MCU. GaN's high switching frequency capability can push up the multiplexing frequency so a GaN-based flyback was built and proved the concept.
Original language | English |
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Title of host publication | 2021 IEEE Applied Power Electronics Conference and Exposition, APEC 2021 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 2830-2835 |
Number of pages | 6 |
ISBN (Electronic) | 9781728189499 |
DOIs | |
State | Published - Jun 14 2021 |
Event | 36th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2021 - Virtual, Online, United States Duration: Jun 14 2021 → Jun 17 2021 |
Publication series
Name | Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC |
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Conference
Conference | 36th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2021 |
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Country/Territory | United States |
City | Virtual, Online |
Period | 06/14/21 → 06/17/21 |
Funding
This research used resources available at the Power Electronics and Electric Machinery Research Facility located at the National Transportation Research Center, a DOE EERE User Facility operated by the Oak Ridge National Laboratory (ORNL). The authors would like to thank Melissa Lapsa, Joe Hagerman, Ron Ott, Robert Wagner from Oak Ridge National Laboratory for their support and guidance. This manuscript has been authored by UT-Battelle LLC under Contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan. (http://energy.gov/downloads/doe-public-access-plan).
Keywords
- Flyback
- GaN
- LED driver
- Multi-channel
- Multiplexing
- Solid state lighting
- Time division multiplexing
- Time sharing