Audio power source with improved efficiency
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.
1. A device, comprising:
a controller;
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 wherein the controller is used to control the amount of voltage of one or more of V1 and V2 based on a feedback signal; 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 , wherein the controller is coupled to the error amplifier and opto-coupler.
10. The device of claim 9 , wherein the error amplifier, opto-coupler and the controller comprise a feedback circuit which provides the 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 wherein a controller is used to control the amount of voltage of one or more of V1 and V2 based on a feedback signal; 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.
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 , wherein the controller is coupled to the error amplifier and opto-coupler.
20. The device of claim 9 , wherein the error amplifier, opto-coupler and the controller comprise a feedback circuit which provides the feedback signal to the controller to regulate a V1 voltage level.