Tool/software:
Here is the Flybuck design with TPS54308.
There're two setting for UVLO trigger point. One is internal Vin UVLO. The VIN UVLO with falling edge => 3.3V,min 3.6V,typ 3.9V,max, second one is using programmable resistor divider with EN pin.
You can see that there're something switching spike on yellow color as waveform below. But when UVLO is set by EN pin, the issue is gone. Why?
Application: gate driver bias power for UPS. (Flybuck topology)
1. UVLO by VIN UVLO
2. UVLO by EN pin
