A power system includes a first DC-DC converter circuit and a second DC-DC converter circuit, each including a power input terminal and a sensor. The sensor includes a sensor output terminal and at least one of a current sensor and a voltage sensor. The power system also includes a master Power Factor Correction (PFC) circuit that includes a power output terminal coupled to the power input terminal of the first DC-DC converter circuit; and a slave PFC circuit, which includes a power output terminal coupled to the power input terminal of the second DC-DC converter circuit and a voltage adjustment terminal coupled to the sensor output terminal of the second DC-DC converter circuit and to the sensor output terminal of the first DC-DC converter circuit.