Control circuit for power supply device, power supply device, and control method thereof

Abstract

A control circuit for a power supply device, a power supply device, and a control method thereof are provided where the output voltages to be supplied to various devices are determined and set up to optimum levels rapidly and efficiently. A control circuit 10A in a power supply device supplies a device 60, which supplies an initial voltage and then demands to receive a required level of voltage which is different from an initial voltage supplied beforehand, with the required level of voltage ranging from V1 to V3. The control circuit 10A comprises a communication unit 21 for receiving a demand level such as V1 and a storage unit 22, including REG1 to REG3, for storing an initial setting level beforehand for determining the initial voltage and the demand level received by the communication unit 21. The initial voltage or the required voltage ranging from V1 to V3 can controlled in response to the initial setting level or the demand level.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram showing the connection between a power supply device and an electronic device according to one embodiment of the present invention;

FIG. 2 is a circuitry diagram of the power supply device connected to the electronic device; and

FIG. 3 is a schematic view of the electronic device connected with the power supply device.

Claims

1. A control circuit for a power supply device for supplying a required voltage to a device which supplies an initial voltage and then demands to receive the required voltage different from the initial voltage, the control circuit comprising: a communication unit for receiving a demand level for the required voltage; anda storage unit for storing an initial setting level used to determine the initial voltage beforehand and storing the demand level received by the communication unit, whereinthe initial voltage or the required voltage is controlled in response to the initial setting level or the demand level.

2. The control circuit for a power supply device according to claim 1, comprising: a nonvolatile storage unit in which at least the initial setting level is stored beforehand, a register unit for storing the initial setting level and the demand level, wherein the register unit stores the initial setting level read out from the nonvolatile storage unit when the power supply device is started and stores the demand level received by the communication unit when the power supply device is operated.

3. The control circuit for a power supply device according to claim 2, further comprising: a voltage controller unit for controlling the initial voltage or the required voltage in response to the initial setting level or the demand level stored in the register unit.

4. The control circuit for a power supply device according to claim 2, wherein the register unit stores the demand level in place of the initial setting level when the power supply device is operated.

5. The control circuit for a power supply device according to claim 2, wherein the nonvolatile storage unit stores the demand level.

6. The control circuit for a power supply device according to claim 5, wherein the nonvolatile storage unit stores the demand level in place of the initial setting level stored beforehand.

7. The control circuit for a power supply device according to claim 5, wherein the demand level is received by the communication unit and then stored in the register unit and simultaneously stored in the nonvolatile storage unit.

8. The control circuit for a power supply device according to claim 5, wherein the demand level, after received by the communication unit, is stored in the register unit and then stored in the nonvolatile storage unit.

9. A power supply device for supplying a required voltage to a device which supplies an initial voltage and then demands to receive the required voltage different from the initial voltage, the power supply device comprising: a communication unit for receiving a demand level for the required voltage;a storage unit for storing an initial setting level used to determine the initial voltage beforehand and storing the demand level received by the communication unit, whereinthe initial voltage or the required voltage is controlled in response to the initial setting level or the demand level.

10. The power supply device according to claim 9, comprising: a nonvolatile storage unit in which at least the initial setting level is stored beforehand, a register unit for storing the initial setting level and the demand level, wherein the register unit stores the initial setting level read out from the nonvolatile storage unit when the power supply device is started and stores the demand level received by the communication unit when the power supply device is operated.

11. The power supply device according to claim 10, comprising: a voltage controller unit for controlling the initial voltage or the required voltage in response to the initial setting level or the demand level stored in the register unit.

12. The power supply device according to claim 10, wherein the register unit stores the demand level in place of the initial setting level when the power supply device is operated.

13. The power supply device according to claim 10, wherein the nonvolatile storage unit stores the demand level.

14. The power supply device according to claim 13, wherein the nonvolatile storage unit stores the demand level in place of the initial setting level stored beforehand.

15. The power supply device according to claim 13, wherein the demand level is received by the communication unit and then is stored in the register unit and is simultaneously stored in the nonvolatile storage unit.

16. The power supply device according to claim 13, wherein the demand level, after received by the communication unit, is stored in the register unit and then is stored in the nonvolatile storage unit.

17. A control method of a power supply device for supplying a required voltage to a device which supplies an initial voltage and then demands to receive the required voltage different from the initial voltage, the method comprising steps of: receiving a demand level for the required voltage;storing an initial setting level used to determine the initial voltage beforehand and storing the demand level received; andcontrolling the initial voltage or the required voltage in response to the initial setting level or the demand level.

18. The control method of a power supply device according to claim 17, further comprising steps of: storing at least the initial setting level beforehand in a nonvolatile mode; storing the initial setting level and the demand level in a volatile mode; reading out the initial setting level stored in the nonvolatile mode and storing the initial setting level in a volatile mode when the power supply device is started, and storing the demand level received in the volatile mode when the power supply device is operated.

19. The control method of a power supply device according to claim 18, wherein the demand level is stored in the nonvolatile mode.

20. The control method of a power supply device according to claim 19, wherein the demand level is stored in the nonvolatile mode in place of the initial setting level stored beforehand in the nonvolatile mode.