With the TPS16530, a simple 48-V power supply path protection can be realized for telecom radios. Figure 9-8 shows the simplified schematic for this. For start-up with negative gate voltage drive at GaN FETs, TI recommends to use appropriate resistors for biasing the gate of GaN FETs to keep V_OUT > –0.2 V and I_OUT < 70 μA from TPS16530.

Protection features with this configuration include:

• Accurate current limiting with pulse current support
• Inrush current control with 24-V/500-µs output voltage slew rate