Circuit arrangement having a transformation apparatus and operating method for a lamp using a circuit arrangement having a transformation apparatus
First Claim
1. A circuit arrangement having a transformation apparatus, which has a primary side and a secondary side, the primary side and the secondary side being DC-isolated from one another, the primary side having a terminal for a supply voltage and being connected to a first reference potential, the secondary side comprising a first output line and a second output line which form an output terminal at which a voltage for a load can be provided, comprising:
- first apparatus for tapping off a measured voltage potential on only the secondary side; and
second apparatus for determining whether the measured voltage potential is in a permissible range,wherein the first apparatus comprises a capacitor connected in series between the measured voltage potential and the second apparatus, wherein both first and second output lines are not DC-coupled to a reference potential during normal operation.
1 Assignment
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Accused Products
Abstract
The present invention relates to a circuit arrangement having a transformation apparatus, which has a primary side (P) and a secondary side (S), wherein the primary side and the secondary side (S) are DC-isolated from one another, wherein the primary side (P) has a terminal for a supply voltage (UE) and is connected to a first reference potential, wherein the secondary side (S) comprises a first and a second output line, which, in the normal case, are not coupled to a reference potential and which form an output terminal, at which a voltage for a load (LA) can be provided, wherein it furthermore comprises: an apparatus for tapping off a measured voltage potential (CP) on the secondary side (S); and an apparatus (10) for determining whether the measured voltage potential is in a permissible range. The invention moreover relates to an operating method for a lamp using a circuit arrangement.
11 Citations
15 Claims
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1. A circuit arrangement having a transformation apparatus, which has a primary side and a secondary side, the primary side and the secondary side being DC-isolated from one another, the primary side having a terminal for a supply voltage and being connected to a first reference potential, the secondary side comprising a first output line and a second output line which form an output terminal at which a voltage for a load can be provided, comprising:
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first apparatus for tapping off a measured voltage potential on only the secondary side; and second apparatus for determining whether the measured voltage potential is in a permissible range, wherein the first apparatus comprises a capacitor connected in series between the measured voltage potential and the second apparatus, wherein both first and second output lines are not DC-coupled to a reference potential during normal operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15)
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9. An operating method for a lamp using a circuit arrangement having a transformation apparatus, which has a primary side and a secondary side, the primary side and the secondary side being DC-isolated from one another, the primary side having a terminal for a supply voltage and being connected to a first reference potential, the secondary side comprising a first output line and a second output line which form an output terminal at which a voltage for a load can be provided, comprising:
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tapping off a measured voltage potential on only the secondary side; and determining whether the measured voltage potential is in a permissible range; wherein tapping is performed via a capacitor connected in series between the measured voltage potential and the second apparatus, wherein both first and second output lines are not DC-coupled to a reference potential during normal operation.
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Specification