> A 0R025 RSENSE resistor means that we're ramping the current up to 4A before > releasing the energy stored in the inductor. 4A is a lot of current. The > magnetic field produced by the inductor is so strong that it affects > everything around it, even very carefully routed traces
> I did some experimenting and: > > -- moving the inductor away is a solution, but it needs to be *far* away, 8cm > or so, > > -- shielding the inductor, while improving the situation, increases the > current consumption 2x, produces audible noise and heats up the shield > considerably, so it is not a solution. > > All in all, I don't think a circuit with an RSENSE of 0R025 is feasible, at > least not with a 5cm x 5cm board. I'll be going back to 0R050 and 0R100 and > smaller inductors. Have you tried a toroidal inductor? They're better behaved in this respect, even though they're physically large, especially for the high current one you'd need. Here's a datasheet from one manufacturer: http://www.cooperindustries.com/content/dam/public/bussmann/Electronics/Resources/Data%20Sheets/Bus_Elx_DS_PM%204304_LPCI_Series.pdf - John -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
