Charger circuit including a plurality of charging paths

• US 9,973,017 B2
• Filed: 09/16/2015
• Issued: 05/15/2018
• Est. Priority Date: 09/19/2014
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kudo, Ryotaro, Keum, Dongjin, Ko, Yus, Nam, Hyunseok, Noh, Gwang-Yol, Seo, Whanseok, Choi, Jaeyoup
• Primary Examiner(s): Pelton, Nathaniel
• Application Number:
  US14/856,376
• Publication Number:
  US 20160087462A1
• Time in Patent Office: 972 Days
• Field of Search: 320162
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence

Abstract

A charger circuit includes a first path regulator, a path switch, and a second path regulator. The first path regulator is configured to generate a first regulation current based on an input voltage and an input current. The path switch is configured to pass or block a first charging current in response to a control signal. The first charging current is generated based on the first regulation current. The second path regulator is configured to generate a second regulation current based on the input voltage and the input current. At least one of the first charging current and a second charging current is used to charge a battery. The second charging current is generated based on the second regulation current. The second charging current is transferred to the battery without passing through the path switch.

Claims

1. A charger circuit comprising:

a first path regulator configured to output a first regulation current to a first output terminal based on an input voltage and an input current;

a path switch configured to pass or block a first charging current in response to a control signal, the first charging current being generated based on the first regulation current, the path switch being connected between the first output terminal and a battery terminal; and

a second path regulator configured to output a second regulation current to a second output terminal based on the input voltage and the input current,

wherein at least one of the first charging current or a second charging current is used to charge a battery at the battery terminal,

wherein the second charging current is generated based on the second regulation current,

wherein the path switch and another path switch is not connected between the second output terminal and the battery terminal, and

wherein the second charging current is transferred to the battery without passing through the path switch.

2. The charger circuit of claim 1, further comprising:

a charger controller configured to generate the control signal, and to control an operation of each of the first path regulator, the path switch, and the second path regulator.

3. The charger circuit of claim 1, wherein in a charging mode where the battery is charged, the path switch blocks the first charging current, and the second charging current is used to charge the battery.

4. The charger circuit of claim 3, wherein in the charging mode, the first path regulator generates a first regulation voltage based on the input voltage and the input current, and a system voltage provided to a power management chip is generated based on the first regulation voltage.

5. The charger circuit of claim 1, wherein each of the first and second path regulators comprises a buck converter, a boost converter, a buck-boost converter, or a linear regulator.

6. A charger circuit comprising:

a first charging path transferring a first charging current from a first output terminal to a battery terminal to charge a battery, the first charging current being generated based on an input voltage and an input current; and

a second charging path transferring a second charging current from a second output terminal to the battery terminal to charge the battery, the second charging current being generated based on the input voltage and the input current,

wherein the first charging path comprises a path switch configured to pass or block the first charging current in response to a control signal, the path switch being connected between the first output terminal and the battery terminal, and

wherein the path switch and another path switch is not connected between the second output terminal and the battery terminal.

7. The charger circuit of claim 6, further comprising:

a charger controller configured to generate the control signal, to control an operation of the path switch, and to control at least one of intensity of the first charging current, intensity of the second charging current, or a ratio of the intensity of the first charging current to the intensity of the second charging current.

8. The charger circuit of claim 7, wherein in a charging mode where the battery is charged, the path switch passes the first charging current, and at least one of the first charging current or the second charging current is used to charge the battery.

9. The charger circuit of claim 8, wherein when a value of an output voltage of the battery is smaller than a reference value in the charging mode, the second charging current has an intensity of “

0”

, and the first charging current is used to charge the battery, according to the control signal of the charger controller.

10. The charger circuit of claim 9, wherein when the value of the output voltage of the battery is greater than or equal to the reference value in the charging mode, a third charging current is used to charge the battery according to the control signal of the charger controller, and

wherein the third charging current corresponds to a sum of the first charging current and the second charging current.

11. The charger circuit of claim 6, wherein the input voltage and the input current are supplied from at least one power source.

12. The charger circuit of claim 6, wherein the first charging path further comprises one or more regulators.

13. The charger circuit of claim 6, wherein the second charging path comprises one or more regulators.

14. A charger circuit comprising:

a first charging path transferring a first charging current from a first output terminal to a battery terminal to charge a battery; and

a second charging path transferring a second charging current from a second output terminal to the battery terminal to charge the battery,

wherein the first charging path comprises a first path regulator and a path switch, the path switch passes or blocks the first charging current in response to a control signal, and the path switch is connected between the first output terminal and the battery terminal,

wherein the second charging path comprises a second path regulator, without the path switch and another path switch between the second output terminal and the battery terminal and

wherein the first path regulator comprises first and second transistors, and a switching driver for turning on or turning off each of the first and second transistors in an alternate manner to generate the first charging current.

15. The charger circuit of claim 14, wherein intensity of the first charging current is controlled by adjusting a turn-on time of each of the first and second transistors.

16. The charger circuit of claim 14, wherein the first charging current and the second charging current are interleaved with each other.

17. The charger circuit of claim 14, further comprising a charger controller controlling a ratio of intensity of the first charging current to intensity of the second charging current.

18. The charger circuit of claim 14, further comprising an input switch,

wherein the input switch comprises a first terminal connected to an input terminal of the charger circuit, and a second terminal connected to the first path regulator,

wherein the path switch comprises a third terminal connected to a system terminal, and a fourth terminal connected to the battery terminal, and

wherein the system terminal outputs a system voltage based on an output of the first path regulator.

19. The charger circuit of claim 18, wherein when the input terminal is floated, the path switch is turned on and an output voltage of the battery is provided to the system terminal through the turned-on path switch.

20. The charger circuit of claim 18, wherein the charger circuit operates in a boost mode for supplying power to a peripheral device when the peripheral device is connected to the input terminal.