US 12,336,071 B2
Driver for lighting means
Christian Nesensohn, Götzis (AT)
Assigned to Tridonic GmbH & Co KG, Dornbirn (AT)
Appl. No. 18/261,543
Filed by Tridonic GmbH & Co KG, Dornbirn (AT)
PCT Filed Feb. 7, 2022, PCT No. PCT/EP2022/052829
§ 371(c)(1), (2) Date Jul. 14, 2023,
PCT Pub. No. WO2022/175125, PCT Pub. Date Aug. 25, 2022.
Claims priority of application No. 21157746 (EP), filed on Feb. 18, 2021.
Prior Publication US 2024/0080954 A1, Mar. 7, 2024
Int. Cl. H05B 45/382 (2020.01); H05B 45/14 (2020.01)
CPC H05B 45/382 (2020.01) [H05B 45/14 (2020.01)] 16 Claims
OG exemplary drawing
 
1. A driver (100) for an LED load (105) comprising:
input terminals (101a, 101b) for an AC voltage;
output terminals (104a, 104b) for supplying the LED load (105);
a detection circuitry (102) configured to obtain a signal representing a frequency of the AC voltage and an amplitude of the peak of each cycle of the AC voltage; and
a control circuit (103) being connected to the detection circuitry (102) and supplied with said signal;
wherein the driver (100) comprises a switched isolated converter, the control circuit is arranged on the secondary side of the switched isolated converter, and the detection circuit is on the primary side of the switched isolated converter, and
the detection circuitry comprises a reference diode configured to compare the AC voltage with a defined threshold voltage and said signal includes timings of the AC voltage crossing the threshold value.