Figure 4-1 shows the PFC input voltage and input current waveform measured at the following parameters:

• Traces
  • C2: V_IN
  • C4: I_IN
• Conditions
  • V_IN = 208 V
  • V_OUT = 400 V
  • R_OUT = 43 Ω

Figure 4-1 PFC Input Voltage and Input Current

Figure 4-2 shows the PFC GaN drain voltage waveform measured at the following parameters:

• Traces
  • C1: GaN Switch Node Drain Voltage
  • C2: V_IN
  • C4: I_IN
• Conditions
  • V_IN = 208 V
  • V_OUT = 400 V
  • R_OUT = 43 Ω

Figure 4-2 PFC GaN Drain Voltage

A zoom-in of the GaN switch drain-to-source voltage transition is shown to be approximately 20 ns in Figure 4-3. This rapid transition comes from the low C_OSS of the LMG3522.

The waveform in Figure 4-3 was measured using the following parameters:

• Traces
  • C1: GaN Switch Node Drain Voltage
  • C2: V_IN
  • C4: I_IN
• Conditions
  • V_IN = 208 V
  • V_OUT = 400 V
  • R_OUT = 43 Ω

Figure 4-3 PFC GaN Drain Voltage - Transition