UCC5350: CLAMP connection in bipolar power config

Andrew,

miller clamp pin should be connected directly to the GATE, not OUTL. Usually we use gate resistor, if you connected CLAMP to OUT pin, this defeats the point of having a miller clamp which is to provide a very low path to VEE2 to prevent spikes on gate and thus false turn on.

If the CLAMP pin is unused, you /can/ float it, but we recommend to tie it to VEE2 instead since it is also an input.

If this answers your question, please let m eknow by pressing the green button.

Best

Dimitri

Andrew,

the gate is the gate of the mosfet or IGBT, please see Figure 58 on Page#34, i am linking below. 

https://www.ti.com/lit/ds/symlink/ucc5350.pdf#page=34

If this answers your question, please let me know by pressing the green button.

Best

DImitri

VEE will always be 0V or negative referenced to the source/emitter. The only limit on how negative VEE can go is what the FET/IGBT can tolerate. This detail would be listed in their datsheet.

CLAMP should always be connected to the gate, regardless of whether it is referenced to the VEE2 or source/emitter