How to design a controller for a non inverting bidirectional buck boost converter?

Question

This is the circuit diagram that i made in matlab. I want in to design a controller for the it such that it works as a boost converter in one direction and buck in the other direction. But i don't know how to implement it.

Answer 1

At least you could simplify it:

^{simulate this circuit – Schematic created using CircuitLab}

buck mode:

• M1 turns on for specified duty time with regard to stepping down ratio
• M2 synchronously switches on while M1 is off
• M2 also switches off if a back flow is detected with comparator CMP2

boost mode:

• M2 turns on for specified duty time with regard to stepping up ratio
• M1 synchronously switches on while M2 is off
• M1 also switches off if a back flow is detected with comparator CMP1

Code:

if (V1/10) * hyst  > V2 then
    do buck()
else if V2*10 * hyst > V1 then
    do boost()
else 
    do nothing()
end_if