Hello, I am trying to design a series boost converter to supply +180V @ 120mA max. from a nominal 12V input. (If this could be stretched to between 9-18V input this would be really useful, but not critical.) It is for powering a plasma display panel.
I have already attempted this using the UC3843 which is working only to about 60mA after which point it all goes sideways (the unit starts buzzing, the output drops to about 160V and the FET gets warm).
I then found the reference design PMP5161 which uses the similar UCC2813 to produce 150V @ 480mA from a 24V input. I am wondering if this design could provide the basis for what I am looking for and how to go about modifying it. I already understand the basics of these circuits but really start to struggle with the mathematics when it comes to control systems and stability in the complex plane, and would really appreciate some guidence with this. Some time has been spent chosing the switching components and have selected suitably rated FET with really low RDSon and Qc and a catch-diode with very fast Trr and a massive inductor so saturation is not going to be a problem. The idea here is that these components are about the best possible and can always be scaled back later when the prototype is working.
