On LM5001 Boost Evalboard, and also on LM5001 schem generated by Webench, there is a RC (6.8R+470pF) in parallel to rectifer diode. It's the first time I see this, and there is no explanation, nor in Datasheet, neither in the many Boost related Application Notes. What's the use of this ? Is it because of high-voltage outputs (48V), or because the switch is NPN ? How to calculate these components values ? What's the impact on efficiency ? What of conducted EMI, and output noise ?
Thank you in advance,
E. HEURTEL