MP4245 Eval. Board design, GND2

DC-DC Power Converters
1

Hi everybody!

I’m confused about the “GND2” in the Eval. Board desing of the MP4245. Can maybe somebody explain why it’s there respectively whats the purpose of having two GNDs?

Thanks a lot in advance

2

Hello @kober,

Welcome to MPS forums. The GND2 acts as a reference ground or point for the ground currents that are sensed by ISENS+ and ISENS-.This ensures noise immunity against PGND which is subjected to high switching noises and this sensed signal is used for constant current limiting.