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US 12,336,071 B2Granted
Driver for lighting means
AssigneeTridonic GmbH & Co KG
InventorChristian Nesensohn
Life of this patent
Estimating the term…
Abstract
The disclosure relates to a driver for lighting means (100) comprising: input terminals (101a, 101b) for an optionally rectified AC voltage; output terminals (104a, 104b) for supplying a LED load (105), a detection circuitry (102) connected to the input terminals (101a, 101b), 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.
Claims16
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.
4 more elements
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 detection circuitry (102) determines a time duration between a rising edge threshold crossing and a falling edge threshold crossing of the AC voltage in order to produce a signal indicating the peak amplitude of the AC voltage;
- and
- wherein the control circuit (103) is configured to access a look-up table in order to convert the time duration between the raising edge threshold crossing and the falling edge threshold crossing of the AC voltage into a peak voltage value of the AC voltage.
5 more elements
Dependencies are inferred from the claim text.