We are using Top 265 EG in one of our power supply design, the power supply specifications are listed below
Input: Universal input 85-264V AC
Output 1 :24V rated for 0.6A
Output 2: 5V rated for 1.25A
Secondary winding: AC stack(24v on top of 5V)
Feedback: Weighted feedback Optocoupled using TL431
we have designed the prototype and both power rails (24V & 5V ) are fine during the no-load condition, but when 5V rail is lightly loaded (say 10mA), the 24 V rail shoots to 30V.to overcome this issue, we added a preload of 20mA to the 24V rail and the voltage rise came down to 25V and load& line regulation was found to be ok
is there a way to avoid this preload to reduce the power consumption during no-load condition?