We have the reference demo board DC1994A 18-72V to 12V/12A.
We will modify transformer Np/Ns = 1/3, frequency =250KHz, Duty_max =36.11%, Po=150W
We looking for the reference design of LT3753 + LT8311 to output 19.5V. Can you provide related schematic or design spreadsheet?
With 1:3 turns ratio, Duty_min would be around 9%, not optimal for efficiency. A turns ratio around 1:2 would be recommended for this Vin range and Vout. For more info, please contact me at email@example.com