Balanced boost/buck DC to DC converter
First Claim
1. A DC to DC converter, comprising:
- an inductor;
a first transistor having a first power terminal connectable to one side of a DC power supply and a second power terminal connected to one end of the inductor;
a second transistor having a first power terminal connected to the other end of the inductor and a second power terminal connectable to another side of the DC power supply;
a pair of capacitors connected in series and defining a node therebetween which is connected to a ground potential;
a third transistor having a first power terminal connected to the one end of the inductor and a second power terminal connected to one end of the pair of capacitors;
a fourth transistor having a first power terminal connected to the other end of the pair of capacitors and a second power terminal connected to the other end of the inductor; and
a controller connected to a control terminal of each transistor for controlling the switching thereof.
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Accused Products
Abstract
A DC to DC converter includes a first transistor having a first power terminal connected to one side of a DC power supply and a second power terminal connected to one end of an inductor. A second transistor has a first power terminal connected to the other end of the inductor and a second power terminal connected to the other side of the DC power supply. A pair of capacitors is connected in series and defined therebetween a node which is connected to a ground potential. A third transistor has a first power terminal connected to the one end of the inductor and a second power terminal connected to one end of the pair of capacitors. A fourth transistor has a first power terminal connected to the other end of the pair of capacitors and a second power terminal connected to the other end of the inductor. Each transistor includes a diode connected between the first power terminal and the second power terminal thereof. Each diode is oriented to conduct current in a direction opposite its corresponding transistor. A controller is connected to a control terminal of each transistor for controlling the switching thereof. The DC to DC converter can be operated to increase or decrease a DC voltage between the DC power supply and the pair of capacitors connected in series. Connecting the ground potential to the node between the pair of capacitors avoids generating large potential differences between the DC power supply and the pair of capacitors.
207 Citations
26 Claims
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1. A DC to DC converter, comprising:
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an inductor; a first transistor having a first power terminal connectable to one side of a DC power supply and a second power terminal connected to one end of the inductor; a second transistor having a first power terminal connected to the other end of the inductor and a second power terminal connectable to another side of the DC power supply; a pair of capacitors connected in series and defining a node therebetween which is connected to a ground potential; a third transistor having a first power terminal connected to the one end of the inductor and a second power terminal connected to one end of the pair of capacitors; a fourth transistor having a first power terminal connected to the other end of the pair of capacitors and a second power terminal connected to the other end of the inductor; and a controller connected to a control terminal of each transistor for controlling the switching thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A DC to DC converter, comprising:
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a first switch and a second switch connected in series between a first input/output of the converter and a second input/output of the converter, with the first switch and the second switch defining therebetween a first node; a third switch and a fourth switch connected in series between the first input/output of the converter and the second input/output of the converter, with the third switch and the fourth switch defining therebetween a second node; an inductor connected between the first node and the second node; a pair of capacitors connected in series across the second input/output of the converter and defining therebetween a third node which is connected to a ground potential; and a controller connected to control the switching of at least one of the switches. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A DC to DC converter, comprising:
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a first pair of diodes connected in series and defining therebetween a first node, with the first pair of diodes connected to conduct current from a first input/output of the converter to a second input/output of the converter; a second pair of diodes connected in series and defining therebetween a second node, with the second pair of diodes connected to conduct current from the second input/output of the converter to the first input/output of the converter; a pair of inductors connected in series between the first node and the second node, with the pair of inductors defining therebetween a third node which is connected to a reference ground; a pair of capacitors connected in series across the second input/output of the converter, with the pair of capacitors defining therebetween a fourth node which is connected to the reference ground; a first switch connected in parallel with one diode of the first pair of diodes adjacent the first input/output of the converter; a second switch connected in parallel with one diode of the second pair of diodes adjacent the first input/output of the converter; and a controller connected to control the switching of the first and second switches, wherein during operation of the converter, the first and second switches are controlled to conduct current between the first input/output of the converter and the pair of inductors. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification