MSW Inverter 150W transformer requirements

1) 75KHz push-pull configuration, center tap at supply
2) Primary supply voltage range - 10.5 to 16VDC
3) Secondary rectifier configuration – Full wave center tap
4) Secondary voltage (after rectification and filtering) 1.1Amp load 12.0VDC input voltage 49/49 duty cycle – 170VDC
5) Maximum temperature rise @ 150W load – 30’C
6) Maximum dimensions – 38 X 38 X 26mm
7) Max hipot voltage -  1500VDC

哪位大俠知道這個變壓器的設計方法,教教小弟吧.謝謝!