Hi,
Please help to advise on the Schematic based on Part: UCC28740.
Project: Railways Power Supply
Specs: INput: 60Vac-160Vac, Output: Dual (12V/1.5A and 5V/1A).
Please refer the Schematic at page4: http://www.ti.com/lit/ug/sluual8/sluual8.pdf
Transformer and components changes are as follows:
RT1‐ 4.7E
C3,C4‐ 10uF
R10||R11‐ 0.39ohm
Q1‐ STD4N80K5
R9‐ 560ohm
R2‐ 33K
R3‐ 16K
C8,C10‐ 100uF
D5,D6 (combined)‐ 
STPS20100
another winding for 
(12V) with its components (schematic attached).
Regards,
Rajesh Gupta