Hi Moses, What David writes below about the capacitance reduction of ceramic capacitors is correct. I have experienced success using polymer aluminium electrolytics (solid electrolyte) to replace conventional low-ESR electrolytic capacitors that regularly fail in similar applications. You might like to experiment with these.
Best regards Roger Brinkman. > On 19 May 2022, at 12:42 pm, David Forbes <nixiebu...@gmail.com> wrote: > > > I haven't tried it, but I can make some observations. The MAX1771 isn't > connected directly to the output circuit, so it's not likely to suffer from a > problem. The current flows through the inductor which will accommodate a > momentary short circuit caused by the capacitor. > In short, it shouldn't be a problem. > Bear in mind that the effective capacitance of a modern ceramic capacitor is > much lower with a DC bias near its rated voltage, so you would need to use > either capacitors rated for 5x the output voltage, or about 5x the desired > capacitance. > Some capacitor data sheets publish this reduction in capacitance as a > function of bias voltage, most don't. Look for it. > > >> On Wed, May 18, 2022, 6:49 PM Moses <mo...@neonixie.com> wrote: >> Before I let the magic smoke out of half a dozen MAX1771 ICs.. has anyone >> ever tried using ceramic output capacitors? It wants a low ESR capacitor, so >> ceramics may work well. >> >> The datasheet doesn't mention ceramics on the output side.. but then again >> it was written a few decades ago when the required voltage/capacitance >> probably was not readily available. >> >> Regards, >> -Moses >> -- >> 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 neonixie-l+unsubscr...@googlegroups.com. >> To view this discussion on the web, visit >> https://groups.google.com/d/msgid/neonixie-l/7ae38dca-64ca-459d-a1e5-283a062f8f9en%40googlegroups.com. > > -- > 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 neonixie-l+unsubscr...@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/CAPbqtvcg0ak%2BLMH_7JJ01eFnYjFzu38v2N59k8ZfoFxrRY3J_g%40mail.gmail.com. -- 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 neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/59DCAAA6-8B67-414E-B688-F74906D04C93%40gmail.com.
