SYSTEM AND METHOD FOR REGULATING MULTIPLE OUTPUTS IN A DC-DC CONVERTER
First Claim
1. A DC-DC converter for providing independent secondary side voltage regulation for a plurality of loads comprising:
- a power transformer having at least a primary winding and a secondary winding;
an input circuit coupled to said primary winding for coupling an input DC voltage to said primary winding;
a plurality of output channels coupled to said secondary winding, each of said output channels having a secondary side switching element, secondary side control means for alternately turning on and off said secondary side switching elements for providing said independent secondary side voltage regulation.
1 Assignment
0 Petitions
Accused Products
Abstract
A multiple output flyback converter provides independently controlled high-bandwidth secondary side voltage regulation for rapid response to small signal changes at the multiple outputs on the secondary side. Each of the multiple output circuits includes a fast local feedback loop to perform rapid and precise secondary side voltage regulation. The fast local secondary side feedback loops compensate for small changes in the load on the order of 1 to 5 percent. By providing each output circuit with independent secondary-side control, the last or final voltage output is controlled from the primary side. A further feature of the inventive circuit is that the input circuit of the converter includes an active clamp circuit for recovering both energy in the leakage inductance and additionally recovers residual energy in the magnetic field of the secondary winding of the transformer at the end of each energy cycle.
54 Citations
14 Claims
-
1. A DC-DC converter for providing independent secondary side voltage regulation for a plurality of loads comprising:
-
a power transformer having at least a primary winding and a secondary winding;
an input circuit coupled to said primary winding for coupling an input DC voltage to said primary winding;
a plurality of output channels coupled to said secondary winding, each of said output channels having a secondary side switching element, secondary side control means for alternately turning on and off said secondary side switching elements for providing said independent secondary side voltage regulation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A method for providing independent secondary side voltage regulation for a plurality of loads, said method comprising the steps of:
-
providing a DC-DC converter for providing independent secondary side voltage regulation for a plurality of loads comprising;
providing a power transformer having at least a primary winding and a secondary winding;
providing an input circuit coupled to said primary winding for coupling an input DC voltage to said primary winding;
providing a plurality of output channels coupled to said secondary winding, each of said output channels having a secondary side switching element; and
providing secondary side control means for alternately turning on and off said secondary side switching elements for providing said independent secondary side voltage regulation.
-
Specification