FIG. 6 illustrates a flow diagram of a method 400 of a thermal management of a power converter in accordance with one embodiment. In one embodiment, the method 400 involves directing a first portion of a single-phase fluid from a condenser to a first two-phase heat transfer device of a first cooling loop at step 402. In certain embodiments, the single-phase fluid includes a liquid medium. In one embodiment, the power converter includes a sealed casing and the condenser is disposed outside the sealed casing. The method 400 further involves directing a second portion of the single-phase fluid from the condenser to a second two-phase heat transfer device of a second cooling loop at step 404. Further, the method 400 involves dissipating heat from a first component to the first portion of the single-phase fluid via the first two-phase heat transfer device and produce a first portion of a two-phase fluid at step 406. The first component is disposed within the sealed casing and coupled to the first two-phase heat transfer device. In certain embodiments, the two-phase fluid includes a liquid medium and a gaseous medium. The method 400 further involves a step 408 of dissipating heat from a second component to the second portion of the single-phase fluid via the second two-phase heat transfer device and produce a second portion of the two-phase fluid. In one example embodiment, the second component is disposed within the sealed casing and coupled to the second two-phase heat transfer device. The method 400 further involves pumping the first portion of the two-phase fluid from the first two-phase heat transfer device to the condenser at step 410. In one embodiment, the first two-phase heat transfer device is configured to passively pump the first portion of the two-phase fluid to the condenser. The method 400 further involves pumping the second portion of the two-phase fluid from the second two-phase heat transfer device to the condenser at step 412. In one embodiment, the second two-phase heat transfer device is configured to passively pump the second portion of the two-phase fluid to the condenser. In some embodiments, the first and second cooling loops are disposed parallel to one another. In some embodiments, the method 400 further involves a step of dissipating heat from a third component to the second portion of the single-phase fluid via a single-phase heat transfer device of the second cooling loop before directing the second portion of the single-phase fluid to the second two-phase heat transfer device. In one embodiment, the third component and the single-phase heat transfer device are disposed within the sealed casing. Further, the single-phase heat transfer device is coupled to the third component.