Half Bridge DC DC Converter

Design Project for a Half Bridge DC/DC Converter

Given a set of customer requirements, design a suitable DC/DC converter.
Project includes full derivation of control transfer functions, simulink model.

Design Spec:

Voltage input
200-650 VDC
Voltage output
28VDC, regulated
Full load power
300W
Minimums load
20% of full load
Ripple voltage
?100mV at full load
Control loop bandwidth
?5kHz (full load)
Control loop phase margin
?45º (full load)

This is a project I did for school.