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L6388E design support

Question asked by Mat Maher on Jun 27, 2018
Latest reply on Jun 28, 2018 by Mat Maher

Hi all,

 

I'm in the process of bringing up a new design using the L6388E gate drivers. However, I've run into a stumbling block. Hopefully its something stupid in the design, but I'm at a loss: was wondering if anyone has any ideas? 

 

I'm applying constant voltage to the HIN pin, but getting nout out on the gate line. All the other voltages are reading good, however. Cext calculations for these FETS come out at 8.3nF: so that 100nF bootstrap should be gross overkill. Voltage readings appended to the schematic below.

 

Any ideas?

 

Mat 

 

 

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