Electronic circuit performing buck-boost conversion using single inductive element

Patent metadata

Field	Value
Publication number	US-10615696-B2
Application number	US-201816228363-A
Country	US
Kind code	B2
Filing date	Dec 20, 2018
Priority date	Feb 14, 2018
Publication date	Apr 7, 2020
Grant date	Apr 7, 2020

Abstract

An electronic circuit includes an inductive element, a capacitive element, and switch elements. A first end of the inductive element is connected to an input voltage. A first end of a first switch element is connected to the first end of the inductive element. The capacitive element is connected between a second end of the first switch element and a second end of the inductive element. A second switch element is connected between the second end of the first switch element and a reference voltage. A third switch element is connected between the second end of the inductive element and the reference voltage. A fourth switch element is connected between the second end of the inductive element and a first output voltage. A fifth switch element is connected between the second end of the inductive element and a second output voltage.

First claim

What is claimed is:

1. An electronic circuit, comprising:
an inductive element having a first end directly connected to an input voltage and a second end;
a first capacitive element having a first end and a second end, wherein the second end of the first capacitive element is directly connected to the second end of the inductive element;
a first switch element having a first end directly connected to the first end of the inductive element and the input voltage, and a second end directly connected to the first end of the capacitive element;
a second switch element having a first end directly connected to the second end of the first switch element and the first end of the capacitive element, and a second end directly connected to a reference voltage;
a third switch element connected between the second end of the inductive element and the reference voltage;
a fourth switch element connected between the second end of the inductive element and a first output voltage; and
a fifth switch element connected between the second end of the inductive element and a second output voltage.

2. The electronic circuit of claim 1 , wherein the first and second output voltages are converted from the input voltage such that each of a first voltage level of the first output voltage and a second voltage level of the second output voltage is higher or lower than a voltage level of the input voltage.

3. The electronic circuit of claim 1 , wherein when current flows through the inductive element and the fourth switch element, the first output voltage is converted from the input voltage based on the current.

4. The electronic circuit of claim 3 , wherein when the current flows through the inductive element and the fourth switch element, the current does not pass through another switch element.

5. The electronic circuit of claim 1 , further comprising:
a second capacitive element connected between a first end of the fourth switch element and the reference voltage, wherein
a second end of the fourth switch element is connected to the second end of the inductive element.

6. The electronic circuit of claim 5 , wherein when current flows through the second and fourth switch elements, the first capacitive element and the second capacitive element are connected in parallel between the second end of the inductive element and the reference voltage.

7. The electronic circuit of claim 1 , wherein when current flows through the first switch element, the current flows along a loop path which includes the inductive element, the first capacitive element, and the first switch element.

8. The electronic circuit of claim 7 , further comprising:
a third capacitive element connected between a first end of the fourth switch element and the reference voltage, wherein:
a second end of the fourth switch element is connected to the second end of the inductive element, and
when the current flows along the loop path, the first output voltage is output based on energy stored in the third capacitive element.

9. An electronic circuit, comprising:
a conversion circuit which includes an inductor which is directly connected to an input voltage, and a first capacitor which is directly connected to the inductor, wherein the inductor outputs a current through an inductive element based on the input voltage; and
a plurality of output circuits that output a plurality of output voltages based on the current, each of the plurality of output voltages having a voltage level higher or lower than a voltage level of the input voltage, wherein
when a first output circuit of the plurality of output circuits outputs a first output voltage having a voltage level lower than the voltage level of the input voltage, the voltage level of the first output voltage decreases as the current flows along a loop path which includes the inductive element and the first capacitor, and the voltage level of the first output voltage increases as the current is transferred to the first output circuit, and
the conversion circuit further includes:
a first switch element having a first end directly connected to the inductor and the input voltage, and a second end directly connected to the first capacitor;
a second switch element having a first end directly connected to the first switch element and the first capacitor, and a second end directly connected to a reference voltage; and
a third switch element having a first end directly connected to the inductor, and a second end directly connected to the reference voltage, the first output circuit includes:
a fourth switch element having a first end directly connected to the inductor and the first capacitor, and a second end directly connected to the first output voltage; and
a second capacitor connected between the second end of the fourth switch element and the reference voltage,

when the current flows through the second and fourth switch elements, the first capacitor and the second capacitor are connected in parallel between the inductor and the reference voltage.

10. The electronic circuit of claim 9 , wherein when the voltage level of the first output voltage is lower than the voltage level of the input voltage and the voltage level of the first output voltage increases, a voltage between both ends of the second capacitor corresponds to the first output voltage.

11. The electronic circuit of claim 9 , wherein:
the fourth switch element selectively provides or does not provide a current path for the current, and
when the voltage level of the first output voltage is lower than the voltage level of the input voltage and the fourth switch element provides the current path, the voltage level of the first output voltage increases.

12. The electronic circuit of claim 9 , wherein:
the fourth switch element selectively provides or does not provide a current path for the current, and
when the fourth switch element provides the current path, the current path does not include another switch element.

13. The electronic circuit of claim 9 , wherein:
the fourth switch element that selectively provides or does not provide a current path for the current, and
when the voltage level of the first output voltage is lower than the voltage level of the input voltage and the fourth switch element does not provide the current path, the voltage level of the first output voltage decreases.

14. The electronic circuit of claim 9 , wherein as the current flows along the loop path, an amount of energy stored in the inductive element decreases.

15. The electronic circuit of claim 9 , wherein a second output circuit of the plurality of output circuits outputs a second output voltage having a voltage level higher or lower than the voltage level of the input voltage, regardless of whether the voltage level of the first output voltage is higher or lower than the voltage level of the input voltage.

16. An electronic circuit comprising:
a conversion circuit that outputs a first current through an inductive element based on an input voltage; and
a first switch element that selectively provides or does not provide a current path for the first current and a second current which is based on the first current and outputs an output voltage having a voltage level higher or lower than a voltage level of the input voltage, wherein:
the current path includes the first switch element and does not include another switch element, and
when the voltage level of the output voltage is lower than the voltage level of the input voltage and the first switch element does not provide the current path, the first current freewheels through the inductive element.

Assignees

• Samsung Electronics Co Ltd
• Korea Advanced Inst Sci & Tech

Inventors

• Jung Minyong
• Kang Gyeong-Gu
• Cho Gyu-Hyeong
• Kim Hyunseok
• Bang Heemun
• Shin Se-Un
• Chae Chang Seok

Classifications

• H02M3/1582 Primary

  Buck-boost converters (H02M3/1584 takes precedence) · CPC title

• G05F1/577 Primary

  for plural loads · CPC title

• H02J7/0086

  Electricity · mapped topic

• H02M2001/0054

  Electricity · mapped topic

• H02M2001/009

  Electricity · mapped topic