Electronic device including boost circuit

Patent metadata

Field	Value
Publication number	US-12255535-B2
Application number	US-202218072719-A
Country	US
Kind code	B2
Filing date	Dec 1, 2022
Priority date	Dec 1, 2021
Publication date	Mar 18, 2025
Grant date	Mar 18, 2025

Abstract

An electronic device with a boost circuit includes: a first capacitor including a first terminal connected to an input terminal and a second terminal connected to a reference potential terminal; a first rectification element; a second capacitor including a first terminal connected to the first terminal of the first capacitor through the first rectification element and a second terminal connected to the reference potential terminal; a voltage detection circuit including a voltage detection terminal connected to the first terminal of the second capacitor and a detection signal output terminal; and a boost circuit including a detection signal input terminal connected to the detection signal output terminal, a boost power input terminal connected to the first terminal of the first capacitor, and a boost power output terminal connected to a node between the first terminal of the second capacitor and the voltage detection terminal.

First claim

What is claimed is:

1. An electronic device including a boost circuit, the electronic device comprising:
an input terminal;
a first capacitor including a first terminal connected to the input terminal and a second terminal connected to a reference potential terminal for providing a reference potential;
a first rectification element which includes a first terminal connected to the first terminal of the first capacitor and a second terminal and in which a direction from the first terminal to the second terminal is set as a forward direction;
a second capacitor including a first terminal connected to the first terminal of the first capacitor through the first rectification element and a second terminal connected to the reference potential terminal;
a voltage detection circuit including a voltage detection terminal connected to the first terminal of the second capacitor and a detection signal output terminal; and
a boost circuit including a detection signal input terminal connected to the detection signal output terminal, a boost power input terminal connected to the first terminal of the first capacitor, and a boost power output terminal connected to a node between the first terminal of the second capacitor and the voltage detection terminal.

2. The electronic device including a boost circuit according to claim 1 , further comprising a second rectification element provided between the boost power output terminal and the node.

3. The electronic device including a boost circuit according to claim 1 , further comprising a coil provided between the first terminal of the first capacitor and the first terminal of the first rectification element.

4. The electronic device including a boost circuit according to claim 3 ,
wherein the first rectification element is connected between the boost power output terminal and the node.

5. An electronic device including a boost circuit, the electronic device comprising:
an input terminal;
a first capacitor including a first terminal connected to the input terminal and a second terminal connected to a reference potential terminal for providing a reference potential;
a booster including:
a boost circuit including a boost power input terminal connected to the first terminal of the first capacitor;
a boost power output terminal to which a power obtained by converting a power transmitted from the boost power input terminal is supplied;
a coil containing a first terminal connected to the boost power input terminal and a second terminal connected to the boost power output terminal;
a rectification element rectifying a current supplied from the boost circuit; and
a smoothing circuit which includes a second capacitor including a first terminal and a second terminal connected to the reference potential terminal, and which smooths the current;

a voltage detection circuit including a voltage detection terminal from which a stored voltage in the second capacitor is received, and a detection signal output terminal to which a detection signal is supplied in a state where the voltage received from the voltage detection terminal is larger than a prescribed voltage,
the boost circuit further including a detection signal input terminal connected to the detection signal output terminal.

6. The electronic device including a boost circuit according to claim 5 , further comprising an output terminal,
wherein the first terminal of the second capacitor is connected to the output terminal and the voltage detection terminal.

7. The electronic device including a boost circuit according to claim 5 ,
wherein the rectification element includes an anode connected to the boost power output terminal, and a cathode connected to the first terminal of the second capacitor and the voltage detection terminal.

8. The electronic device including a boost circuit according to claim 5 ,
wherein the rectification circuit is provided on both a first path and a second path,
wherein the first path is provided between the first terminal of the first capacitor and the first terminal of the second capacitor, and
wherein the second path is provided between the boost power output terminal and a node between the first terminal of the second capacitor and the voltage detection terminal.

Assignees

• Ablic Inc

Inventors

• Utsunomiya Fumiyasu
• Douseki Takakuni
• Tanaka Ami

Classifications

• H02J7/96

  in response to battery voltage · CPC title

• H02J7/80

  including monitoring or indicating arrangements · CPC title

• H02J7/933

  the cycle being controlled or terminated in response to electric parameters · CPC title

• H02J7/855

  with circuits adapted for supplying loads from the battery · CPC title

• H02J7/751 Primary

  concerning the insertion or the connection of the batteries · CPC title