Electronic device including boost circuit

Patent metadata

Field	Value
Publication number	US-12401274-B2
Application number	US-202217695003-A
Country	US
Kind code	B2
Filing date	Mar 15, 2022
Priority date	Mar 16, 2021
Publication date	Aug 26, 2025
Grant date	Aug 26, 2025

Abstract

An electronic device including a boost circuit includes a first boost circuit, a first output circuit, a load, a first storage capacitor, a second storage capacitor, and an input terminal, wherein the input terminal is connected to the first storage capacitor and the first boost circuit, the second storage capacitor is connected to the first boost circuit and the first output circuit, and the load is connected to the first output circuit.

First claim

What is claimed is:

1. An electronic device comprising: an input terminal connected to a power generator that supplies input electricity; a first storage capacitor configured to store the input electricity therein supplied through the input terminal, wherein the first storage capacitor is operable to repeat charge and discharge of the input electricity stored therein; a first boost circuit activated to become operative, from being inactive, to start to elevate the input electricity stored in the first storage capacitor to first elevated electricity when the input electricity stored in the first storage capacitor increases its voltage to a first predetermined voltage during charging the first storage capacitor with the input electricity and deactivated to become inactive when the input electricity stored in the first storage capacitor is discharged through boosting operation of the first boost circuit; a second storage capacitor configured to store the first elevated electricity therein supplied from the first boost circuit, wherein the second storage capacitor is operable to repeat charge and discharge of the first elevated electricity stored therein; a first output circuit activated to become operative, from being inactive, to start to elevate the first elevated electricity stored in the second storage capacitor to second elevated electricity when the first elevated electricity stored in the second storage capacitor increases its voltage to a second predetermined voltage during charging the second storage capacitor with the first elevated electricity and deactivated to become inactive when the first elevated electricity stored in the second storage capacitor is discharged through boosting operation of the first output circuit; and a load connected to the first output circuit to receive the second elevated electricity from the first output circuit.

2. The electronic device according to claim 1 , wherein the first elevated electricity stored in the second storage capacitor has a voltage higher than a voltage of the input electricity stored in the first storage capacitor.

3. The electronic device according to claim 2 , wherein the first output circuit includes a first voltage detection circuit, a third boost circuit, and a second switch, the second switch is disposed between an input terminal of the first output circuit and the third boost circuit, and a control terminal of the second switch is connected to the first voltage detection circuit.

4. The electronic device according to claim 2 , wherein the first output circuit includes a first voltage detection circuit and a second switch, the second switch is disposed between an input terminal and an output terminal of the first output circuit, and a control terminal of the second switch is connected to the first voltage detection circuit.

5. The electronic device according to claim 2 , wherein the first output circuit includes a first voltage detection circuit, a fourth boost circuit, and a transistor switch, the transistor switch is disposed between a power supply terminal of the fourth boost circuit and a GND power supply, and a control terminal of the transistor switch is connected to the first voltage detection circuit.

6. The electronic device according to claim 1 , wherein the first output circuit includes a first voltage detection circuit, a third boost circuit, and a second switch, the second switch is disposed between an input terminal of the first output circuit and the third boost circuit, and a control terminal of the second switch is connected to the first voltage detection circuit.

7. The electronic device according to claim 1 , wherein the first output circuit includes a first voltage detection circuit and a second switch, the second switch is disposed between an input terminal and an output terminal of the first output circuit, and a control terminal of the second switch is connected to the first voltage detection circuit.

8. The electronic device according to claim 1 , wherein the first output circuit includes a first voltage detection circuit, a fourth boost circuit, and a transistor switch, the transistor switch is disposed between a power supply terminal of the fourth boost circuit and a GND power supply, and a control terminal of the transistor switch is connected to the first voltage detection circuit.

9. The electronic device according to claim 1 , wherein the first boost circuit comprises: a second boost circuit activated to elevate the input electricity stored in the first storage capacitor and output a third elevated electricity; a third storage capacitor configured to store the third elevated electricity therein supplied from the second boost circuit; a first control circuit activated by a stored voltage of the third storage capacitor to become operative, from being inactive, to start to output an on/off signal to inductively elevate the input electricity stored in the first storage capacitor to the first elevated electricity; and a first switch turned on to connect the third storage capacitor to the first control circuit to activate the first control circuit, when the stored voltage of the third storage capacitor increases to a third predetermined voltage during charging the third storage capacitor with the third elevated electricity.

10. The electronic device according to claim 9 , wherein the first boost circuit further comprises a fourth storage capacitor configured to smooth power supply to the first control circuit.

11. The electronic device according to claim 1 , wherein the first output circuit comprises:
a third boost circuit activated to elevate the first elevated electricity stored in the second storage capacitor to the second elevated electricity;
a fifth storage capacitor configured to store the first elevated electricity therein supplied from the second storage capacitor;
a second switch turned on to connect the second storage capacitor to the third boost circuit to activate the third boost circuit;
a second control circuit included in the third boost circuit and activated by a stored voltage of the fifth storage capacitor to start to output an on/off signal to inductively elevate the first elevated electricity stored in the second storage capacitor to the second elevated electricity; and
a first voltage detection circuit configured to monitor the stored voltage of the fifth storage capacitor and turn on the second switch to activate the second control circuit when the stored voltage of the fifth storage capacitor increases to a fourth predetermined voltage during charging the fifth storage capacitor with the first elevated electricity.

12. The electronic device according to claim 11 , wherein the first output circuit is configured to supply the second elevated electricity back to the first voltage detection circuit to keep the second switch turned on and back to the second control circuit to keep the second control circuit activated.

13. The electronic device according to claim 11 , wherein the third boost circuit further comprises a sixth storage capacitor configured to smooth power supply to the third boost circuit and a seventh storage capacitor configured to smooth power supply to the load.

14. The electronic device according to claim 1 , wherein the first output circuit comprises:
a fifth storage capacitor configured to store the first elevated electricity therein supplied from the second storage capacitor;
a second switch turned on to connect the second storage capacitor directly to the load to supply the first elevated electricity stored in the second storage capacitor directly to the load; and
a first voltage detection circuit configured to monitor a store

Assignees

• Ablic Inc

Inventors

• Utsunomiya Fumiyasu
• Douseki Takakuni
• Tanaka Ami

Classifications

• H02M3/158

  including plural semiconductor devices as final control devices for a single load · CPC title

• H02M1/0096

  Means for increasing hold-up time, i.e. the duration of time that a converter's output will remain within regulated limits following a loss of input power · CPC title

• H02M1/0006

  Arrangements for supplying an adequate voltage to the control circuit of converters · CPC title

• H02M1/007

  Plural converter units in cascade (push-pull DC/DC converters with pre-regulator H02M3/3374; DC-AC converters following a DC-DC stage including a high frequency transformer H02M7/4807; DC-AC converters following a DC-DC conversion stage generating periodically varying voltages H02M7/4826) · CPC title

• H02M1/088

  for the simultaneous control of series or parallel connected semiconductor devices · CPC title