TIDUF64A December 2023 – August 2024
The inductor plays an important role in system efficiency, current ripple, and overall size. The inductance value is calculated based on the input voltage, output voltage, and worst-case ripple. The inductance value of the DC/AC converter can be calculated with Equation 16.
where,
Normally, the recommendation is to work with an inductor peak-to-peak current of less than 40% of the average inductor current for maximum output current. A smaller ripple from a larger valued inductor reduces the magnetic hysteresis losses in the inductor and EMI. The saturation current of the inductor must be higher than the calculated peak inductor current.
The inductor peak current is calculated with Equation 14.
where,
iL(pk-pk) is the peak-to-peak inductor current ripple