Using the high voltage output as the regulated rail really works well! The low voltage output only varies by about 15% for a high voltage load from 0 to 75mA (The 170V was rock solid). A few more benefits from this implementation, and this mod in general:
1. No boost converter heating in the target circuit as all the conversion is done in the wall adapter. 2. Super quiet operation, audio and electrical since the switcher operates exactly the same whether it outputs 9V or 170V. 3. Putting the feedback on the high voltage serves as a bleeder current to discharge the output capacitor. 4. Scalable to other voltages: I did a test with another turns ratio and am getting a clean 14W at 300V. 5. Scalable to higher power levels: I did the same mod on a 24W unit and got 140mA at 170V. 6. Failure of the high voltage supply can be fixed by swapping the adapter instead of opening the target circuit. -- 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/adce243a-ebb9-440a-bf5a-3f12b8c64e22%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
