A resonant converter comprising: an input stage (110, 150) coupled to a power source, wherein the input stage (110, 150) comprises a plurality of power switches; a first resonant tank coupled to a first portion of the plurality of power switches, wherein the first resonant tank is of a first Q value; a second resonant tank coupled to a second portion of the plurality of power switches, wherein the second resonant tank is of a second Q value; wherein the first portion of the plurality of power switches and the first resonant tank form a first resonant converter having the first Q value; and the second portion of the plurality of power switches and the second resonant tank form a second resonant converter having the second Q value, wherein the first resonant converter and the second resonant converter are connected in parallel and wherein the first Q value is greater than the second Q value; a transformer coupled to the input stage (110, 150) through the first resonant tank and the second resonant tank; and an output stage coupled to the transformer; wherein the converter is configured so that the first portion of the plurality of power switches is enabled and the second portion of the plurality of power switches is disabled during a startup process of the resonant converter; and the second portion of the plurality of power switches remains disabled but is enabled after an output voltage of the resonant converter is greater than a first predetermined threshold and a load current of the resonant converter is greater than a second predetermined threshold. an input stage (110, 150) coupled to a power source, wherein the input stage (110, 150) comprises a plurality of power switches; a first resonant tank coupled to a first portion of the plurality of power switches, wherein the first resonant tank is of a first Q value; a second resonant tank coupled to a second portion of the plurality of power switches, wherein the second resonant tank is of a second Q value; wherein the first portion of the plurality of power switches and the first resonant tank form a first resonant converter having the first Q value; and the second portion of the plurality of power switches and the second resonant tank form a second resonant converter having the second Q value, wherein the first resonant converter and the second resonant converter are connected in parallel and wherein the first Q value is greater than the second Q value; a transformer coupled to the input stage (110, 150) through the first resonant tank and the second resonant tank; and an output stage coupled to the transformer; wherein the converter is configured so that the first portion of the plurality of power switches is enabled and the second portion of the plurality of power switches is disabled during a startup process of the resonant converter; and the second portion of the plurality of power switches remains disabled but is enabled after an output voltage of the resonant converter is greater than a first predetermined threshold and a load current of the resonant converter is greater than a second predetermined threshold. a transformer coupled to the input stage (110, 150) through the first resonant tank and the second resonant tank; and an output stage coupled to the transformer;