The PGND pin is the gate-drive return for the PWML signal. It is NOT a ground return; do not confuse it as a power ground pin. It is not connected to AGND or BGND within the IC.

• The PGND signal is normally connected to the source pin of the low-side switching device, and run in parallel with PWML to minimize loop area.
• In certain cases, PGND may be connected to AGND at a location where PWML return currents do not create ground noise to disturb control signals referenced to AGND.
• For the individual low-side GaN power IC with logic PWM input, it is recommended to connect PGND to the bottom of the current sense resistor (R_CS) directly.