Current control loop compensation network

Question

I have an application that uses n-channel Mosfet as a high-side switch controlled by an IC driver. The point of the Mosfet is to manage the inrush current to the load. I understand that the resistor R₁ is there to prevent oscillations, but I'm not sure if I understand the rest of the circuitry connected to the gate of the Mosfet the right way.

I see the purpose of the C₂ as an "additional" capacitance to increase the low internal Mosfet Gate capacitance to control the inrush current / managing the slew rate. But what's the point of R₂?

I read that the R₂ + C₂ form a compensation network to compensate for the current control loop. If this is true, could anyone please explain how exactly it works?

Answer 1

Your R2 and C2 are used when the MOSFET (your M1) has a gate-source capacitance less than 2 nF. In the data sheet R2 is called \$R_{HG}\$ and C2 is called \$C_{HG}\$: -

And, the text from the data sheet says this: -

So, yes they are required for compensation (when the MOSFET gate capacitance is below 2 nF) and, together, they mimic the presence of a bigger MOSFET.