US 11,751,308 B2
Isolated driver for lighting means
Wayne Bell, Broompark (GB)
Assigned to Tridonic GmbH & Co KG, Dornbirn (AT)
Appl. No. 17/780,399
Filed by Tridonic GmbH & Co KG, Dornbirn (AT)
PCT Filed Dec. 16, 2020, PCT No. PCT/EP2020/086569
§ 371(c)(1), (2) Date May 26, 2022,
PCT Pub. No. WO2021/130090, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 19219212 (EP), filed on Dec. 23, 2019.
Prior Publication US 2023/0026746 A1, Jan. 26, 2023
Int. Cl. H05B 45/30 (2020.01); H05B 45/382 (2020.01); H05B 45/36 (2020.01)
CPC H05B 45/382 (2020.01) [H05B 45/36 (2020.01)] 13 Claims
OG exemplary drawing
 
1. An isolated driver (100) for lighting means (109), comprising:
a primary circuit (100a);
a secondary circuit (100b);
an isolation barrier (106) separating the primary circuit (100a) and the secondary circuit (100b), wherein a ground potential of the primary circuit (100a) and a ground potential of the secondary circuit (100b) are connected via a capacitor (107);
a shunt resistor (113) connected in series between the capacitor (107) and the ground potential of the secondary circuit (100b); and
a control circuit (111) on the secondary side (100b), monitoring a current to/from the capacitor (107) to the ground potential of the secondary circuit (100b) by monitoring the voltage drop across the shunt resistor (113) and issuing a mains (101) failure signal in case the current does not meet predefined conditions.