Circuit arrangement
First Claim
Patent Images
1. A circuit arrangement for supplying a load, provided with a DC--DC converter comprising:
- input terminals for connection to a DC voltage source;
a circuit portion comprising inductive means and first capacitive means, said circuit portion interconnecting the input terminals;
a switching element for shunting the first capacitive means;
a control circuit coupled to the switching element for rendering the switching element conducting and non-conducting with high frequency;
a transformer comprising a primary winding and a secondary winding, said primary winding being included in the circuit portion; and
an output circuit coupled to the secondary winding, said output circuit comprising;
output terminals for connection to the load;
rectifying means coupled between the secondary winding and the output terminals; and
second capacitive means connected between the secondary winding and the output terminals,characterized in that the rectifying means is full-wave rectifying means for ensuring that energy is transferred to the output terminals during two time intervals in each high frequency cycle of an output signal on the secondary winding.
1 Assignment
0 Petitions
Accused Products
Abstract
In a multiresonant DC--DC converter provided with a switching element (S1), a transformer (T) and a rectifier coupled to the secondary winding (S) of the transformer, the rectifier is constructed as a diode bridge (D1, D2, D3, D4). It is achieved thereby that the maximum amplitude of the voltage across the switching element is comparatively low. The switching element is highly suitable for supplying a network of LEDs.
106 Citations
11 Claims
-
1. A circuit arrangement for supplying a load, provided with a DC--DC converter comprising:
-
input terminals for connection to a DC voltage source; a circuit portion comprising inductive means and first capacitive means, said circuit portion interconnecting the input terminals; a switching element for shunting the first capacitive means; a control circuit coupled to the switching element for rendering the switching element conducting and non-conducting with high frequency; a transformer comprising a primary winding and a secondary winding, said primary winding being included in the circuit portion; and an output circuit coupled to the secondary winding, said output circuit comprising; output terminals for connection to the load; rectifying means coupled between the secondary winding and the output terminals; and second capacitive means connected between the secondary winding and the output terminals, characterized in that the rectifying means is full-wave rectifying means for ensuring that energy is transferred to the output terminals during two time intervals in each high frequency cycle of an output signal on the secondary winding. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A lighting unit comprising a circuit arrangement for supplying a load, and a network of semiconductor light sources comprising said load coupled to output terminals of said circuit arrangement, wherein said circuit arrangement is provided with a DC--DC converter, and comprises:
-
input terminals for connection to a DC voltage source; a circuit portion comprising inductive means and first capacitive means, said circuit portion interconnecting the input terminals; a switching element for shunting the first capacitive means; a control circuit coupled to the switching element for rendering the switching element conducting and non-conducting with high frequency; a transformer comprising a primary winding and a secondary winding, said primary winding being included in the circuit portion; and an output circuit coupled to the secondary winding, said output circuit comprising; said output terminals for connection to the network of semiconductor light sources; rectifying means coupled between the secondary winding and the output terminals; and second capacitive means connected between the secondary winding and the output terminals, characterized in that the rectifying means is full-wave rectifying means for ensuring that energy is transferred to the output terminals during two time intervals in each high frequency cycle of an output signal on the secondary winding. - View Dependent Claims (11)
-
Specification