Ok, I put in some proposed circuitry for the thermistor protection plus a couple of other small changes. [github.com]
I have put the circuit in for THERM0, and a couple of variants with Zener and TLV431. The TLV431 circuit I just copied from the datasheet. I am straying beyond my normal skill set here, so I am relying on you guys to tell me what I need to do!
It might be nice to test out the circuit on some stripboard first, I'll order some components shortly, I also need to fix my Due :)
With a certain a amount of trial and error, I determined that a value of about 220R seems to be a reasonable value for the gate resistors. It gives turn on time in the order of 1us or 3, without too much oscillation.
The traces show output at the logic buffer (HC244) and the voltage on the mosfet drian.
[attachment 23869 DS0013.png][attachment 23870 DS0014.png]
I have put the circuit in for THERM0, and a couple of variants with Zener and TLV431. The TLV431 circuit I just copied from the datasheet. I am straying beyond my normal skill set here, so I am relying on you guys to tell me what I need to do!
It might be nice to test out the circuit on some stripboard first, I'll order some components shortly, I also need to fix my Due :)
With a certain a amount of trial and error, I determined that a value of about 220R seems to be a reasonable value for the gate resistors. It gives turn on time in the order of 1us or 3, without too much oscillation.
The traces show output at the logic buffer (HC244) and the voltage on the mosfet drian.
[attachment 23869 DS0013.png][attachment 23870 DS0014.png]