Yes. I've got 3 different linear tech devices on my list. The LM3478 actually has an LTSpice model and the Wurth flex transformer I'm using does too (from TI and Wurth respectively). The circuit I put together simulates just fine, so I'm just trying to increase my level of confidence in it at this point (plus I don't like not being able to do something!). What I haven't done is simulate it with a varying load, yet (although, lets face it, the load isn't going to vary much over a short timescale). I also need to check the current going through the transformer against the specs.
> On Aug 10, 2017, at 7:01 PM, gregebert <[email protected]> wrote: > > Have you considered using devices from Linear Technology (now Analog Devices) > ? You can run extensive simulations with LTSpice, using accurate models for > their ICs (I assume they are encrypted spice models). > > I dont do bode plots for any of my designs; instead I rely heavily on spice > simulations and run a lot of corner cases, varying component values, etc. As > your design improves, you will see that overall behavior is not sensitive to > component values. For example, I'm working on a DCDC converter and I had > horrible ringing; changing a capacitor value 2X had a major impact on the > ringing. After some other fiddling, even a 10X change in capacitance no > longer increases the ringing appreciably. > > One thing to really watch-out for is inductor current; make sure you stay > well-clear of the saturation current (Isat) spec for the device. If you are > using a transformer (coupled inductors) , make sure your circuit works nicely > with non-ideal conditions such as finite DC resistance (usually in the > datasheet), and non-ideal coupling (K < 1). All kinds of bugs come crawling > out of the woods; much easier to deal with them with a simulator than a real > circuit on your workbench. > -- > You received this message because you are subscribed to a topic in the Google > Groups "neonixie-l" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/neonixie-l/eBV1MATHn34/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To post to this group, send email to [email protected]. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/b8da15bb-051c-4f48-948a-deb4d20e4482%40googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- 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/F7E6A5FF-2064-4828-B43A-5A04BBD5DA52%40gmail.com. For more options, visit https://groups.google.com/d/optout.
