ISO5452: Added RC Circuit for STO - Increased Switching Losses

Part Number:ISO5452

Hello, 

I'm working on an IGBT gate driver design using the ISO5452 + totem-pole current amplifier.  To implement desaturation detection, we added an RC circuit to OUTL because off the totem pole amplifier as recommended here. 

The problem is that with the added capacitance to the gate, I expect turn-off time and, in turn, switching loss to increase quite a bit. Is there any clever ways to get around this? 

Thanks!