For my CEMF pulse generator, I have come up with an upgraded design for a replacement trigger and drive circuit using a GAN FET and associated driver. My IRF840 was getting fairly hot and, as I've heard these new GaN-based FETs are very robust, that I would give it a try. Also, the proposed use of a driver chip is to reduce the shut-off time of the FET thereby increasing the voltage transient at the Drain.
The present circuit and the proposed one are shown in the attached images.
I have several queries about using the Driver and am not fully confident on whether I have all the pins I need connected, with the FET serving as a low-sided switch?
Firstly, I'm not sure if I need pins 5,10 & 16 connected in some way (chip pinout data is on the image). Also, I'm querying if I can use the same Hall sensor setup, with the BC5409, as a signal to feed the STDRIVEG600 chip? And what might the resistance be just before the Ferrite bead?
The use of the Ferrit bead and the DC-Link snubber (whatever that is) are both recommended in the spec notes for the GAN FET.
Thank you.
The present circuit and the proposed one are shown in the attached images.
I have several queries about using the Driver and am not fully confident on whether I have all the pins I need connected, with the FET serving as a low-sided switch?
Firstly, I'm not sure if I need pins 5,10 & 16 connected in some way (chip pinout data is on the image). Also, I'm querying if I can use the same Hall sensor setup, with the BC5409, as a signal to feed the STDRIVEG600 chip? And what might the resistance be just before the Ferrite bead?
The use of the Ferrit bead and the DC-Link snubber (whatever that is) are both recommended in the spec notes for the GAN FET.
Thank you.
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