LM5025A
I am using LM5025A IC for generating gate pulse to drive MOSFETs (PMOS and NMOS) in Low side active Clamp forward converter. LM5025A circuit is as shown below:
I am not using any soft switching in active clamp forward converter.
4 layer PCB is designed and component placement is as shown below (layout rules given in data sheet is followed)
I am operating my system at 500 kHz. Board is tested for both overlap time and dead time configuration the obtained gate waveforms are as follows:
Waveform at output terminal of IC for overlap configuration
Zoomed view
Problem: In the Gate pulse of main switch (OUT A, Pin 8) there is ringing whenever there is transition in gate pulse of auxiliary switch (OUT B, Pin 9) as marked in figure. Same thing is happening gate pulse of auxiliary switch (OUT B, Pin 9) when there is transition in main switch gate pulse (OUT A, Pin 8). The ringing frequency is 200 MHz.
