Systems and methods for load line regulation of sigma converters

1. A device for load line regulation of a sigma converter, comprising:

a sigma converter comprising an inductor inductor capacitor (LLC) circuit and a buck converter; and

control circuitry for the sigma converter, wherein the control circuitry is configured to:

receive a plurality of electrical measurements associated with the sigma converter, wherein the plurality of electrical measurements comprise a buck current associated with the buck converter;

calculate an output current of the sigma converter based on the buck current;

determine, based on the plurality of electrical measurements and the calculated output current of the sigma converter, an adjusted electrical characteristic for load line regulation of the sigma converter; and

provide, based on the adjusted electrical characteristic, gating signals to the buck converter to perform the load line regulation of the sigma converter.

2. The device of claim 1 , wherein the control circuitry comprises:

load line regulation circuitry, wherein the load line regulation circuitry is configured to:

receive a first set of electrical measurements from the plurality of electrical measurements, wherein the first set of electrical measurements comprises the buck current associated with the buck converter;

determine, based on the first set of electrical measurements and the calculated output current of the sigma converter, the adjusted electrical characteristic; and

provide the adjusted electrical characteristic to a buck controller.

3. The device of claim 2 , wherein the control circuitry further comprises:

the buck controller, wherein the buck controller is configured to:

receive the adjusted electrical characteristic from the load line regulation circuitry; and

provide the gating signals to the buck converter based on the adjusted electrical characteristic and one or more electrical measurements from the plurality of electrical measurements.

4. The device of claim 3 , wherein the control circuitry further comprises:

an LLC controller configured to control the LLC circuit.

5. The device of claim 3 , wherein the first set of electrical measurements comprises an input voltage of the sigma converter, a buck voltage associated with the buck converter, and the buck current associated with the buck converter, and

wherein the load line regulation circuitry is configured to determine the adjusted electrical characteristic based on the input voltage, the buck voltage, and the buck current.

6. The device of claim 5 , wherein the adjusted electrical characteristic is an adjusted current based on the calculated output current of the sigma converter.

7. The device of claim 6 , wherein the buck controller is further configured to:

determine the gating signals for the buck converter based on the adjusted current, the buck voltage, and an output voltage of the sigma converter.

8. The device of claim 3 , wherein the first set of electrical measurements comprises an input voltage of the sigma converter, a buck voltage associated with the buck converter, the buck current associated with the buck converter, and an output voltage of the sigma converter, and

wherein the load line regulation circuitry is configured to determine the adjusted electrical characteristic based on the input voltage, the buck voltage, the buck current, and the output voltage.

9. The device of claim 8 , wherein the adjusted electrical characteristic is an adjusted voltage.

10. The device of claim 9 , wherein the buck controller is further configured to:

determine the gating signals for the buck converter based on the adjusted voltage, the buck voltage, and the buck current.

11. A control circuitry for a sigma converter, wherein the control circuitry comprises:

a load line regulation circuitry configured to:

receive a first set of electrical measurements associated with the sigma converter wherein the first set of electrical measurements comprise a buck current associated with the buck converter;

calculate an output current of the sigma converter based on the buck current;

determine, based on the first set of electrical measurements and the calculated output current of the sigma converter, an adjusted electrical characteristic for load line regulation of the sigma converter; and

provide the adjusted electrical characteristic to a buck controller; and

the buck controller configured to:

receive the adjusted electrical characteristic from the load line regulation circuitry; and

provide, based on the adjusted electrical characteristic, gating signals to a buck converter of the sigma converter to perform the load line regulation of the sigma converter, wherein the sigma converter comprises the buck converter and an inductor inductor capacitor (LLC) circuit.

12. The control circuitry of claim 11 , wherein the buck controller is configured to provide the gating signals to the buck converter based on the adjusted electrical characteristic and one or more additional electrical measurements associated with the sigma converter.

13. The control circuitry of claim 12 , further comprising:

an LLC controller configured to control the LLC circuit.

14. The control circuitry of claim 12 , wherein the first set of electrical measurements comprises an input voltage of the sigma converter, a buck voltage associated with the buck converter, and the buck current associated with the buck converter, and

wherein the load line regulation circuitry is configured to determine the adjusted electrical characteristic based on the input voltage, the buck voltage, and the buck current.

15. The control circuitry of claim 14 , wherein the adjusted electrical characteristic is an adjusted current based on the calculated output current of the sigma converter.

16. The control circuitry of claim 15 , wherein the one or more additional electrical measurements comprise the buck voltage, and an output voltage of the sigma converter, and wherein the buck controller is configured determine the gating signals for the buck converter based on the adjusted current, the buck voltage, and the output voltage of the sigma converter.

17. The control circuitry of claim 12 , wherein the first set of electrical measurements comprises an input voltage of the sigma converter, a buck voltage associated with the buck converter, the buck current associated with the buck converter, and an output voltage of the sigma converter, and

wherein the load line regulation circuitry is configured to determine the adjusted electrical characteristic based on the input voltage, the buck voltage, the buck current, and the output voltage.

18. The control circuitry of claim 17 , wherein the adjusted electrical characteristic is an adjusted voltage.

19. The control circuitry of claim 18 , wherein the one or more additional electrical measurements comprise the buck voltage and the buck current, and wherein the buck controller is configured to determine the gating signals for the buck converter based on the adjusted voltage, the buck voltage, and the buck current.

20. A method for load line regulation of a sigma converter, comprising:

receiving, by control circuitry for the sigma converter, a plurality of electrical measurements associated with the sigma converter, wherein the sigma converter comprises an inductor inductor capacitor (LLC) circuit and a buck converter, and wherein the plurality of electrical measurements comprise a buck current associated with the buck converter;

calculate an output current of the sigma converter based on the buck current;

determining, based on the plurality of electrical measurements and the calculated output current of the sigma converter, an adjusted electrical characteristic for load line regulation of the sigma converter; and

providing, based on the adjusted electrical characteristic, gating signals to the buck converter to perform the load line regulation of the sigma converter.