Power converter

A power transformer, and main current path main switch comprises conductor (L) M1), one-above-the-other layout conductor (L) and main current path is used for receiving to DC input voltage (p4). Control circuit main control switch (M1) cycle sheets (Ton) and/or closed cycle (Toff), stable method for load output voltage. Control circuit further comprises a receiving synchronous signal to protect the main switch (M1) and avoiding condition input end (a). The measuring circuit is a conductor (L) and a main current path's connection, a gain configuration main current path two sides voltage measuring signal. Optimized, measuring circuit comprises peak clamping circuit.