It is required that the peak current is smaller than the OCP (Over current protection) value which is 7.5 A, there are 3 cases which cause high peak current flow through inductor.

1. During power up (idle state, no audio input), the duty cycle increases from 0 to θ. There is a start-up current which flow through inductor to set up the common mode voltage (PVDD×θ).
   Note:

   θ = 0.5 (BD Modulation), 0.14 (1 SPW Modulation), 0.14 (Hybrid Modulation)

2. During music playing, some audio burst signal (high frequency) with very hard PVDD clipping causes PWM duty cycle increase dramatically. This is the worst case and it rarely happens.
   Equation 1.
3. Peak current due to Max output power. Ignore the ripple current flow through capacitor here.
   Equation 2.

It is suggested that inductor saturation current I_sat, is larger than the amplifier peak current during power-up and play audio.

Equation 3.

For higher switching frequencies (Fsw), select the inductors with minimum inductance to be 384 kHz / Fsw × L. Same PVDD and switching frequency, larger inductance means smaller idle current for lower power dissipation.