Coupled inductor type dc to dc converter with single magnetic component

Claim 2

A coupled inductor type boost DC to DC converter comprising: a switching element for converting an input DC voltage to a signal having a time varying waveform, said switching element including a switch having a control terminal and first and second throw terminals; and a first inductive element having: a first winding connected between said first throw terminal of said switch and an input terminal of said converter, a second winding connected between said second throw terminal of said switch and an output terminal of said converter, and a third winding connected at a first end to said control terminal of said switch, to thereby provide a level shifter for shifting the level of a drive signal applied to said control terminal of said switch.

Claim 3

The invention of claim 1 wherein said level shifter includes a pulse width modulator circuit connected to a second end of said third winding of said first inductive element.

Claim 4

The invention of claim 2 wherein said level shifter further includes a driver connected in series between said pulse width modulator circuit and said second end of said third winding of said first inductive element.

Claim 5

The invention of claim 1 further including an auxiliary regulated power supply circuit.

Claim 6

The invention of claim 4 wherein said auxiliary power supply circuit includes a fourth winding of said first inductive element connected at one end to a source of reference potential.

Claim 7

The invention of claim 5 wherein said auxiliary power supply circuit includes a first diode connected at a first end to a second end of said fourth winding of said first inductive element.

Claim 8

The invention of claim 6 wherein said auxiliary power supply circuit includes a fifth winding of said first inductive element, connected at a first end thereof to a second end of said first diode.

Claim 9

The invention of claim 7 wherein said auxiliary power supply circuit further includes a capacitor connected to said second end of said first diode.

Claim 10

The invention of claim 8 wherein said auxiliary power supply circuit further includes a second diode connected at a first end to a second end of said fifth winding of said first inductive element and at a second end to an output terminal of said auxiliary power supply circuit.

Claim 11

The invention of claim 9 wherein said auxiliary power supply circuit further includes a second capacitor connected between said second end of said second diode and said source of reference potential.

Claim 12

The invention of claim 1 further including a ripple cancellation circuit including a fourth winding of said first inductive element connected at a first end to said first throw terminal of said switch and at a second end to a source of reference potential.

Claim 13

The invention of claim 11 wherein said ripple cancellation circuit further includes a second inductive element connected in series with said fourth winding of said first inductive element.

Claim 14

The invention of claim 12 wherein said ripple cancellation circuit further includes a first capacitor connected in series with said fourth winding of said first inductive element.

Claim 15

A coupled inductor type boost DC to DC converter comprising: a switching element for converting an input DC voltage to a signal having a time varying waveform, said switching element including a switch having a control terminal and first and second throw terminals; and a first inductive element having: a first winding connected between said first throw terminal of said switch and an input terminal of said converter, a second winding connected between said second throw terminal of said switch and an output terminal of said converter; and an auxiliary regulated power supply circuit including a third winding of said first inductive element connected at one end to a source of reference potential, a first diode connected at a first end to a second end of said third winding of said first inductive element, a fourth winding of said first inductive element, connected at a first end thereof to a second end of said first diode, a capacitor connected to said second end of said first diode, and a second diode connected at a first end to a second end of said fourth winding of said first inductive element and at a second end to an output terminal of said auxiliary power supply circuit.

Claim 16

A coupled inductor type boost DC to DC converter comprising: a switching element for converting an input DC voltage to a signal having a time varying waveform, said switching element including a switch having a control terminal and first and second throw terminals; and a first inductive element having: a first winding connected between said first throw terminal of said switch and an input terminal of said converter, a second winding connected between said second throw terminal of said switch and an output terminal of said converter; and an auxiliary regulated power supply circuit including a third winding of said first inductive element connected at one end to a source of reference potential, a first diode connected at a first end to a second end of said third winding of said first inductive element, a fourth winding of said first inductive element, connected at a first end thereof to a second end of said first diode, a capacitor connected to said second end of said first diode, and a second diode connected at a first end to a second end of said fourth winding of said first inductive element and at a second end to an output terminal of said auxiliary power supply circuit.

Claim 17

The invention of claim 14 wherein said auxiliary power supply circuit further includes a second capacitor connected between said second end of said second diode and said source of reference potential.

Claim 18

The invention of claim 14 further including a fifth winding connected at a first end to said control terminal of said switch for shifting the level of a drive signal applied to said control terminal of said switch.

Claim 19

The invention of claim 14 further including a fifth winding of said first inductive element connected at a first end to said first throw terminal of said switch and at a second end to said source of reference potential to thereby provide a ripple cancellation circuit.

Claim 20

The invention of claim 17 further including a second inductive element connected in series with said fifth winding of said first inductive element.

Claim 21

The invention of claim 18 further including a first capacitor connected in series with said fifth winding of said first inductive element.

Claim 22

A coupled inductor type boost DC to DC converter comprising: a switching element for converting an input DC voltage to a signal having a time varying waveform, said switching element including a switch having a control terminal and first and second throw terminals; and a first inductive element having: a first winding connected between said first throw terminal of said switch and an input terminal of said converter, a second winding connected between said second throw terminal of said switch and an output terminal of said converter, and a ripple cancellation circuit including a third winding of said first inductive element connected at a first end to said first throw terminal of said switch and at a second end to a source of reference potential.

Claim 23

A coupled inductor type boost DC to DC converter comprising: a switching element for converting an input DC voltage to a signal having a time varying waveform, said switching element including a switch having a control terminal and first and second throw terminals; and a first inductive element having: a first winding connected between said first throw terminal of said switch and an input terminal of said converter, a second winding connected between said second throw terminal of said switch and an output terminal of said converter, and a ripple cancellation circuit including a third winding of said first inductive element connected at a first end to said first throw terminal of said switch and at a second end to a source of reference potential.

Claim 24

The invention of claim 20 wherein said ripple cancellation circuit further includes a second inductive element connected in series with said third winding of said first inductive element.

Claim 25

The invention of claim 21 wherein said ripple cancellation circuit further includes a first capacitor connected in series with said third winding of said first inductive element.

Claim 26

A coupled inductor type boost DC to DC converter comprising: a switching element for converting an input DC voltage to a signal having a time varying waveform, said switching element including a switch having a control terminal and first and second throw terminals; a first inductive element having: a first winding connected between said first throw terminal of said switch and an input terminal of said converter, a second winding connected between said second throw terminal of said switch and an output terminal of said converter.

Claim 27

A coupled inductor type boost DC to DC converter comprising: a switching element for converting an input DC voltage to a signal having a time varying waveform, said switching element including a switch having a control terminal and first and second throw terminals; a first inductive element having: a first winding connected between said first throw terminal of said switch and an input terminal of said converter, a second winding connected between said second throw terminal of said switch and an output terminal of said converter.