I am having 100% failure rate trying to get this high side driver to operate. The failure happens as soon as the 5v logic signal is turned on. I have had straight shorts from VDD to GND, and I have had burnt smoking chips. I am clearly doing something incorrectly.
Following the schematic i made:
The driver datasheet is: Fan7371
https://www.onsemi.com/pub/Collateral/FAN73711-D.pdf
Diode data sheet: c3d04065A
https://www.wolfspeed.com/downloads/dl/file/id/841/product/46/c3d04065a.pdf
Power supplies used:
tektronix PWS2323 DC power Supply 0-32V, 3A
IGBT data sheet: IXXH110N65C4
last circuit the 10ohm Rboot (replaced with 100 ohm in picture) burnt out and then the driver when I was noticing that the capacitors were discharging when VDD was turned off. Pretty sure this should not happen.
EDIT:
The circuit will eventually be run at much higher voltage which is why the overkill on some of the parts.
The pins are correct on the IGBT. orange wire going to 1 (G) and blue going to 3 (S)
In response to the answer:
Similar to this typical setup from the data sheet.
If i add a diode from source to ground would that provide a better result? It was my thinking that CB was able to find the off time charge path through the load ground. when i turn the first supply on it has no trouble charging to 15 volts, but CB does discharge immediately if i turn it off as well.
Best Answer
(1) Get rid of that 10 ohm resistor in series with the boostrap cap. It's slowing down the refresh of your bootstrap cap.
(2) Add decoupling capacitors between Vdd-GND
(3) Increase the size of your boostrap cap to 1 or 10uF. You may still want to keep a 0.1uF in parallel with that for decoupling.
(4) Your C3D04065A is major overkill. That doesn't ever see more than 15V. You could get away with a 1N4448 here if you wanted to.
(5) This part here is important: Bootstrap capacitor high-side drivers cannot run on 100% duty cycle and require the floating drain terminal to be periodically pulled low to refresh the bootstrap cap. This is usually performed by turning on the low-side transistor in the half-bridge through regular operation...but you don't have that in your circuit, so you have a problem. You need to review what a bootstrap circuit actually does and re-design your circuit accordingly (it would involve too much changes to walk you through it as is without you deciding on the approach you want to take first).
(6) IGBTs also sometimes require application of a slightly negative gate voltage relative to the drain, in order to actively drain the charge, for reliable turn-off (unlike a MOSFET).