I've been trying to simulate variations on the reference designs provided elsewhere on the forum and in the DRV2700 documentation. Here's one of them.
The standard ~105V operation works fine in TINA, but I'm having trouble with the flyback configuration. No high voltage output is evident from the DRV2700. I've removed some of the capacitors because the input will be a well-behaved digital DC signal.
I've attached the TINA file. Does anything pop out as a problem?
I started with that. That's where the 1.28M resistor came from. But when it wouldn't simulate, I moved toward the other reference design provided in the forum (below), until I had a mix of the two. I think it has all the subcircuits, though. The input filter and pulldown network using the Rext reference voltage are both there. Because I wasn't having any luck with the SPICE simulations, my goal was to get the simplest circuit that would do the conversion using a clean signal and ideal components to start, then add filters and voltage dividers where necessary.
I can duplicate the HV design from the evaluation board for the initial prototyping work, but I'm mainly interested in getting it to simulate. I'm an applications engineer with Festo, and I want to incorporate this into a larger circuit in duplicate for controlling a two-actuator 3/3 piezo valve with some TTL logic or a microcontroller and analog and digital inputs in a variety of configurations for different clients. Having to do manual calculations then printing up simple PCBs for testing rather than being able to do virtual parameter sweeps of the whole system makes the workflow for tuning the system for multiple applications more tedious. Ideally, I would like to get some approximation of the DRV2700 into Proteus so that I can drop in microcontroller code and get reasonably accurate level estimates for the supporting analog components.
Would it be possible for me to recreate an approximation of the DRV2700 IC with standard discrete components for use in SPICE simulators?
