Open LED protection is not necessary for buck design unless you want to arbitrarily limit the output voltage. It is over voltage protection(OVP) for boost and buck-boost design. Run the circuit from LTspice, you will understand what it does.
Open LED protection is not necessary for buck design unless you want to arbitrarily limit the output voltage. It is over voltage protection(OVP) for boost and buck-boost design. Run the circuit from LTspice, you will understand what it does.