Patent ID: 11863072
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  Y | IPC B  H

Claim 7:
8. A method for operating a DC-DC converter comprising:
providing first, second, third, and fourth power switches each including a control terminal, a first terminal and a second terminal,
wherein the second terminal of the first power switch is connected to the first terminal of the second power switch, and wherein the second terminal of the third power switch is connected to the first terminal of the fourth power switch;
connecting a first terminal of a first inductor to the second terminal of the first power switch and the first terminal of the second power switch;
connecting a second terminal of the first inductor to the second terminal of the third power switch and the first terminal of the fourth power switch;
connecting a first terminal of a first bypass switch to the first terminal of the first power switch and a second terminal of the first bypass switch to the second terminal of the first power switch;
connecting a first terminal of a second bypass switch to the first terminal of the third power switch and a second terminal of the second bypass switch to the second terminal of the third power switch; and
transitioning from one of a discharge-buck mode and a charge-boost mode to a bypass mode by starting in an initial state with the first power switch and the second power switching on and off at duty cycles greater than zero and less than one based on first and second pulse-width modulated signals, respectively, the third power switch on based on a third pulse-width modulated signal, the fourth power switch off based on a fourth pulse-width modulated signal, and the first and second bypass switches off.