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selecting of BLDC motor driver

hello sir 

i was searching for the BLDC motor driver IC for both the cases (a) sensing the rotor position by sensing the hall effect sensor and (b) sensing the Back EmF of the motor 

i came across the link :

where i need to enter control I/F, supply voltage, gate drive, and rating which is either automotive or catalog. i wanted to know exactly what ratings i need to enter. 

it would be very helpfull if i can get the clarification on ths

best regards 

divya