US 12,016,101 B2
Power supply configuration across isolation barrier
Bernd Clauberg, Schaumburg, IL (US); and Yuhong Fang, Naperville, IL (US)
Assigned to SIGNIFY HOLDING, B.V., Eindhoven (NL)
Appl. No. 17/598,264
Filed by SIGNIFY HOLDING B.V., Eindhoven (NL)
PCT Filed Mar. 25, 2020, PCT No. PCT/EP2020/058394
§ 371(c)(1), (2) Date Sep. 25, 2021,
PCT Pub. No. WO2020/193643, PCT Pub. Date Oct. 1, 2020.
Claims priority of provisional application 62/825,115, filed on Mar. 28, 2019.
Claims priority of application No. 19169592 (EP), filed on Apr. 16, 2019.
Prior Publication US 2022/0191997 A1, Jun. 16, 2022
Int. Cl. H05B 47/18 (2020.01); H05B 45/14 (2020.01); H05B 45/30 (2020.01); H05B 45/325 (2020.01); H05B 45/375 (2020.01)
CPC H05B 47/18 (2020.01) [H05B 45/14 (2020.01); H05B 45/325 (2020.01); H05B 45/375 (2020.01)] 11 Claims
OG exemplary drawing
 
1. A powered device, comprising:
a digital addressable lighting interface (DALI) connected to a load to be powered by a power source;
an opto-isolator connected to the DALI;
a controller positioned on a primary side of the opto-isolator, the controller configured to generate a first signal to select whether to provide power to the opto-isolator so that the opto-isolator is conducting or not conducting, wherein when the opto-isolator is conducting the DALI has a maximum current value and when the opto-isolator is not conducting the DALI at a zero current value, the controller further configured to generate a modulated second signal to provide power to the opto-isolator, so that the opto-isolator is conducting with a duty cycle and frequency, and wherein the DALI has a selected current value between the zero current value and the maximum current value, based on the modulated second signal; and
a buck converter receiving a current reference based on a voltage reference based on the second signal, the buck converter configured to output a fixed voltage to the DALI.