AnsweredAssumed Answered

Viper28 voltage drop under load

Question asked by da_silva.vicente on May 7, 2015
Latest reply on May 9, 2015 by kosenko.stanislaw
I built a SMPS using the eDesignSuite. It is based on a Viper28, and was designed to output 15V 750mA from 80-265V AC. I wound my own transformer based on the specs from the design. Under no load the output is 14.4 volts. Under load the output drops to 12.5V. I have attached my schematic, the st schematic and tx design and my pcb layout. Does anyone have any ideas as to what could cause this?