TIDUEH2C - Clarification on minumum duty cycle

Hi,

Based on application note a minimum duty cycle has been calculated started from an fpwm of 60x electrical frequency.

My question is: how 15 PWM periods has been calculated? Thanks

At top speed, the minimum pulse measurement is its most important, being a larger fraction of the total
measurements. With a fPWM = 60 × the electrical frequency, there will be 15 PWM periods between 0 %
and 100% duty cycle . This implies a minimum duty cycle of 1/15 = 6.7%. Designing for a 5% duty cycle will
accommodate slightly slower speeds and simplify calculation.