Operating device with power factor correction and ripple limitation by change in operation
AssigneeTridonic GmbH & Co KG
InventorsFlorian Moosmann, Rainer Troppacher, Frank Lochmann
Life of this patent
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Abstract
Operating device (A) for a luminous means, the operating device having at least one driver circuit for operating at least one luminous means (Last), an energy store (Cbulk) which supplies the driver circuit, a power factor correction circuit which is in the form of a boost converter, supplies the energy store (Cbulk) and has a storage inductor (Lb), an actively clocked switch (S) and a rectifier diode (D), wherein the storage inductor (Lb) has a secondary winding which is arranged in such a manner that said winding is magnetically coupled to the primary winding of the storage inductor (Lb) and is connected in series with a coupling capacitor.
Claims13
An operating device (A) for a light-emitting means comprising
- at least one driver circuit for operating at least one light-emitting means,
- an energy store (Cbulk), which feeds the at least one driver circuit (LED driver),
- a power factor correction circuit, which is in the form of a boost converter and feeds the energy store (Cbulk), having a storage inductor (Lb), an actively clocked switch (S) and a rectifying diode (D), wherein the voltage at the energy store (Cbulk) is monitored, and the operation of the operating device (A) is changed if a ripple of the voltage at the energy store (Cbulk) exceeds a predetermined limit value.
A method for operating light-emitting means, wherein the light-emitting means is operated by at least one driver circuit (LED driver),
- a power factor correction circuit feeds the energy store (Cbulk), and an energy store (Cbulk) feeds the at least one driver circuit (LED driver), the method comprising:
- monitoring the voltage at the energy store (Cbulk), and
- operating the light-emitting means depending on the detected ripple of the voltage at the energy store (Cbulk).
Dependencies are inferred from the claim text.