I did the same process on an HDP24-1AWA01FZ (12V @ 2A) of which I have a couple hundred scrap units and am getting a clean 170V at 140mA. These units are welded better so I should find an easier way to open them.
This is so much easier than the way I tried to do it years ago by trying to redesign the feedback circuits to make the switcher regulate the high voltage directly: I still needed a low voltage rail to generate the logic bias for the opto-coupled feedback circuits which meant adding a linear post regulator or a separate winding and output rectifier/filter. By allowing the switcher to run at its designed output voltage and putting up with sloppier load regulation I am getting the job done with no board modifications. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/6da70e68-280a-4bdc-80b1-fda454cac1ec%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
