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The Current Sense (CS) pins on UCD9248 receive a small voltage that is proportional to the amount of current going through the power stage. They cannot be used for measuring output voltage. If they are not using Ch1-B, they should ground CS-1B. The output voltage of the power stage being controlled by CH-1A is measured by the EAp1 (V+) and EAn1 (V-) pins.
