The relation between current peak adjustment and vref is vastly different, first bewteen chips and manufacturers, and second because different values of Rsense are used. So i dont think there is anything generally valid here, except the basic idea. The exact formula has to be taken, from chip datasheet and the Rs resistors have to be checked on the board documentation. This is for each case in particular. Also not even the basics are 100% valid, there just a few chips which do not even use Rs for sensing but other methods, so this is to speak of diversity.
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