Question:
I tried changing the values of resistors (R3 and R4) in MAX17504 EESIM and could not make the change.
How can this be done?
Answer:
Usually the values of the components can be changed by just double clicking on them and changing the value.
However in this case the values cannot be changed directly as they are dependent on the value of another component.
This is possible but in an indirect way as the values of R3 and R4 depend upon various other parameters. In page 20 of the datasheet for the IC, you will see that R3 depends on fc (55kHz or 1/9 of switching frequency depending upon fsw) and the output capacitance. And R4 in turn depends on the value of R3 and the output voltage. Hence to change the value of R3, and R4 you will need to change the value of output capacitance (C4 in EE-Sim) and then EE-Sim wil recalcutate the values of R3 and R4.