Serial input power converter

An apparatus comprising:

• first and second power converter stages, each power converter stage comprising a transformer that electromagnetically couples a primary side and a secondary side of the power converter stage;
• the primary side of the first power converter stage further comprises n-type metal oxide semiconductor field effect transistors (MOSFETs) T1A and T3A, a capacitor C1 coupled to switching element T1A, and a capacitor C2 coupled to capacitor C1 and to the switching element T3A, wherein the transformer of the first power converter stage is coupled to and between a node between the n-type MOSFETs T1A and T3A and a node between the capacitors C1 and C2;
• the primary side of the second power converter stage further comprises n-type MOSFETs T2A and T4A, a capacitor C3 coupled to switching element T2A, and a capacitor C4 coupled to capacitor C3 and to the switching element T4A, wherein the transformer of the second power converter stage is coupled to and between a node between the n-type MOSFETs T2A and T4A and a node between the capacitors C3 and C4;
• the secondary side of the first power converter stage further comprises output inductors L1 and L3 coupled to an output load and a first rectifier circuit comprising n-type MOSFETs B1 and B3 coupled to and between output inductors L1 and L3, respectively, and ground;
• and
• the secondary side of the second power converter stage further comprises output inductors L2 and L4 coupled to the output load and a second rectifier circuit comprising n-type MOSFETs B2 and B4 coupled to and between the output inductors L2 and L4, respectively, and ground.

An apparatus comprising:

• first and second power converter stages, each power converter stage comprising a transformer that electromagnetically couples a primary side and a secondary side of the power converter stage;
• the primary side of the first power converter stage further comprises n-type metal oxide semiconductor field effect transistors (MOSFETs) T1A, T3A, T1B, and T3B and capacitor C1, wherein C1, the combination of T1A and T3A, and the combination of T1B and T3B are arranged in parallel, and wherein the transformer of the first power converter stage is coupled to and between a node between the n-type MOSFETs T1A and T3A and a node between the n-type MOSFETs T1B and T3B;
• the primary side of the second power converter stage further comprises n-type MOSFETs T2A, T4A, T2B, and T4B and capacitor C2, wherein C2, the combination of T2A and T4A, and the combination of T2B and T4B are arranged in parallel, and wherein the transformer of the second power converter stage is coupled to and between a node between the n-type MOSFETs T2A and T4A and a node between the n-type MOSFETs T2B and T4B;
• the secondary side of the first power converter stage further comprises output inductors L1 and L3 coupled to an output load and a first rectifier circuit comprising n-type MOSFETs B1 and B3 coupled to and between output inductors L1 and L3, respectively, and ground;
• and
• the secondary side of the second power converter stage further comprises output inductors L2 and L4 coupled to the output load and a second rectifier circuit comprising n-type MOSFETs B2 and B4 coupled to and between the output inductors L2 and L4, respectively, and ground.