AUDIO POWER SOURCE WITH IMPROVED EFFICIENCY

• US 20200136574A1
• Filed: 12/24/2019
• Published: 04/30/2020
• Est. Priority Date: 01/09/2018
• Status: Active Grant

• Current Assignee: Biamp Systems, LLC
• Original Assignee: Biamp Systems, LLC
• Inventors: Baretich, David F., Broadley, Simon J.
• Granted Patent: US 11,043,926 B2
• Time in Patent Office: Days
• CPC Class Codes: H02M 3/1566 with means for compensating against rapid load changes, e.g. with auxiliary current source, with dual mode control or with inductance variation
• CPC Class Codes: H02M 3/1582 Buck-boost converters H02M3/1584 takes precedence
• CPC Class Codes: H03F 1/0227 using supply converters
• CPC Class Codes: H03F 2200/03 the amplifier being designed for audio applications
• CPC Class Codes: H03F 2200/351 Pulse width modulation being used in an amplifying circuit
• CPC Class Codes: H03F 3/2171 with field-effect devices H03F3/2173 - H03F3/2178 take precedence

Abstract

Example embodiments provide a device that includes a power transformer with a first output voltage terminal providing a first voltage and a second output voltage terminal providing a second voltage, a voltage regulator coupled to one or more of the first output voltage terminal and the second output voltage terminal, and a power storage element that stores power supplied by the second output voltage, and the first output voltage terminal supplies power to a remote entity until a load power requirement of the remote entity exceeds a threshold power level at which time the power storage element is used to provide power from the second output voltage terminal to the remote entity.

Claims

1. A device, comprising:

a power transformer comprising a first output voltage terminal providing a first voltage (V1) and a second output voltage terminal providing a second voltage (V2); and

a power storage element configured to store power supplied by the second output voltage, wherein the first output voltage terminal is configured to supply power to a remote entity until a load power requirement of the remote entity exceeds a threshold power level at which time the power storage element is used to provide power from the second output voltage terminal to the remote entity.

2. The device of claim 1, wherein V2 is one of a higher voltage, a lower voltage and the same voltage as the V1 voltage.

3. The device of claim 1, comprising a voltage regulator coupled to the first output voltage terminal.

4. The device of claim 3, wherein the voltage regulator is coupled to the second output voltage terminal.

5. The device of claim 3, wherein a set point of the voltage regulator is set to a voltage level that is less than the V1 voltage.

6. The device of claim 1, wherein the power storage element is directly coupled to the second output voltage terminal.

7. The device of claim 1, wherein when the load power requirement of the remote entity exceeds the threshold power level, the V1 voltage decreases below a set point of the voltage regulator.

8. The device of claim 1, further comprising an error amplifier and opto-coupler coupled to the first output voltage terminal.

9. The device of claim 8, further comprising a controller coupled to the error amplifier and opto-coupler.

10. The device of claim 9, wherein the error amplifier, opto-coupler and controller comprise a feedback circuit which provides a feedback signal to the controller to regulate a V1 voltage level.

12. The device of claim 1, wherein V2 is one of a higher voltage, a lower voltage and the same voltage as the V1 voltage.

13. The device of claim 1, comprising a voltage regulator coupled to the first output voltage terminal.

14. The device of claim 3, wherein the voltage regulator is coupled to the second output voltage terminal.

15. The device of claim 3, wherein a set point of the voltage regulator is set to a voltage level that is less than the V1 voltage.

16. The device of claim 1, wherein the second module is directly coupled to the second output voltage terminal.

17. The device of claim 1, wherein when the load power requirement of the remote entity exceeds the threshold power level, the V1 voltage decreases below a set point of the voltage regulator.

18. The device of claim 1, further comprising an error amplifier and opto-coupler coupled to the first output voltage terminal.

19. The device of claim 8, further comprising a controller coupled to the error amplifier and opto-coupler.

20. The device of claim 9, wherein the error amplifier, opto-coupler and controller comprise a feedback circuit which provides a feedback signal to the controller to regulate a V1 voltage level.

11. A device, comprising:

a first module comprising a first output voltage terminal providing a first voltage (V1) and a second output voltage terminal providing a second voltage (V2); and

a second module configured to store power supplied by the second output voltage, wherein the first output voltage terminal is configured to supply power to a remote entity until a load power requirement of the remote entity exceeds a threshold power level at which time the second module is used to provide power from the second output voltage terminal to the remote entity.