Abstract
The realization of a new dual transformer structure with zero-voltage zero-current phase-shifted full-bridge PWM control of switching power supply switch. A detailed analysis of the work of the switching power supply timing and working condition, UC3875 phase-shifted full-bridge trigger. In this topology, based on the work of debugging a power of 840W, switching frequency of 100kHz prototype. Experimental waveforms are listed at the same time, as well as to further validate the efficiency curve of the advantages of the circuit. Keywords: switching power supply phase-shifted full-bridge PWM circuit efficiency
