TIDUET3 Design guide

TIDUET3 February 2021

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2.4.1.4 Boost Inductor Design

To dimension the boost inductor, first calculate the maximum-allowed ripple current. The maximum ripple current is observed at the lowest input voltage and maximum load. Assuming a maximum 30% ripple in the inductor current gives a ripple current of:

Equation 5.

The maximum duty cycle is:

Equation 6.

The minimum boost inductor value is calculated from the maximum duty cycle:

Equation 7.

The boost inductor must be able to support a maximum current of:

Equation 8.