Dear all,
I am working on an RF power amplifier designed to operate at 13.56 MHz. I am using the ADuM4221A gate driver IC in my circuit. The issue I am facing is that the output signal from the driver is not correct. More importantly, even the input signals at pins VIA and VIB are not as expected. According to the datasheet and my understanding, these two input signals should be 180 degrees out of phase with each other. However, after running the simulation in LTspice, I am not getting the required phase relationship. I have attached my .asc file for your reference. I would be very grateful if any of the experienced members in this group could kindly take a look at my circuit and guide me on what might be going wrong. Thank you very much in advance for your time and help.

 

LD1 &LD2 What value? uH or uF What is that? Are you trying to resonate LD1 and Cs1?
CGS1 should be connected G to S of M1.
D1 is upside down.
D3 is upside down and should connect G-S of M1.
L2 is ac shorted out.
U1 pin VDDA is wrong. Why 470nF? Diode is backwards.

 

Here is an example. T2 is center tapped. I know it does not look that way but it is.

Another example. The CT output transformer is easy to see this time.