Multiple output DC to DC converter
AssigneeLucent Technologies Inc.
InventorYimin Jiang
Life of this patent
Estimating the term…
Abstract
A multiple output dc to dc converter is described that has multiple regulated output voltages. This is achieved by using a common subcircuit in conjunction with multiple input subcircuits to power multiple output circuits. The common subcircuit is used with an input subcircuit to form a converter input circuit which with a corresponding output circuit produces an output voltage. Any number of input subcircuits can be used with the common subcircuit to produce a corresponding amount of output voltages. The multiple output dc to dc converter described produces output voltage of the same quality as using parallel converters but with a cost and complexity similar to that of using inferior secondary side switches for auxiliary outputs.
Claims21
A multiple output dc to dc converter having at least two output voltages, comprising:
- a) at least a first and a second output circuits;
- b) at least a first and a second input subcircuits, the first input subcircuit including at least one switch and coupled to the first output subcircuit by a first means for coupling, and the second input subcircuit including at least one switch and coupled to the second output circuit by a second means for coupling;
- and
- c) a common subcircuit including at least one common switch connected to the first input subcircuit and the second input subcircuit wherein the at least one common switch is used with each of the at least one switches of the first input subcircuit and the second input subcircuit to produce the at least two output voltages.
A two-switch, multiple output dc to dc converter having at least two output voltages, comprising:
- a) a first output circuit producing a first output voltage, and a second output circuit producing a second output voltage;
- b) a first input subcircuit coupled to the first output circuit by a first transformer, and including a first switch connected to the first transformer, and a first diode connected to the first switch and the first transformer;
- c) a second input subcircuit coupled to the second output circuit by a second transformer, and including a second switch connected to the second transformer, and a second diode connected to the second switch and the second transformer;
- and
- d) a common subcircuit including a common switch and a common diode, the common switch and the common diode connected to each of the first and second input subcircuits thereby forming a two-switch converter for each of the first and second output voltages, wherein the common switch is cycled at a fixed duty cycle and the first switch is used to regulate the first output voltage and the second switch is used to regulate the second output voltage.
A full-bridge, multiple output dc to dc converter having at least two output voltages, comprising:
- a) a first output circuit producing a first output voltage, and a second output circuit producing a second output voltage;
- b) a first input subcircuit coupled to the first output circuit by a first transformer, and including a first top switch connected to the first transformer and a first bottom switch connected to the first top switch and the first transformer;
- c) a second input subcircuit coupled to the second output circuit by a second transformer, and including a second top switch connected to the second transformer and a second bottom switch connected to the second top switch and the second transformer;
- and
- d) a common subcircuit including a common top switch and a common bottom switch, the common top switch and the common bottom switch connected to each of the first and second input subcircuits to form the multiple input dc to dc converter, wherein the common top switch and common bottom switch are cycled at a fixed duty cycle and the first top switch and first bottom switch are used to regulate the first output voltage and the second top switch and second bottom switch are used to regulate the second output voltage.
Dependencies are inferred from the claim text.