DC/DC and AC/DC (off-line) SMPS evaluation boards are specialized development platforms designed to help engineers and designers test, evaluate, and prototype switching power supply circuits. These boards typically include the SMPS controller or integrated IC, power transistors, inductors, transformers, capacitors, feedback and protection circuits, and connectors for input and output. They provide a ready-to-use environment to assess power conversion performance without the need for a custom PCB, enabling rapid evaluation of efficiency, stability, and thermal behavior.