When some of the "impedance" number were being thrown around in this thread (i.e. < 1 ohm), I was not paying enough attention to realize that figure was for EPDR, equivalent peak dissipation resistance. This is a figure that calculates the peak power loading on the output devices in a linear amplifier when current/voltage are not in phase, it is Not the impedance or a measure of peak current.
EPDR does not apply to a Class-D amplifier. It effectively has no merit in the discussion of a Class-D amplifier. For a Class-D amplifier, the impedance curve is sufficient. Even from a power dissipation standpoint, in a Class-D amplifier, the FETs are not operated in the linear region, so you don’t have the same device loading.
EPDR does not apply to a Class-D amplifier. It effectively has no merit in the discussion of a Class-D amplifier. For a Class-D amplifier, the impedance curve is sufficient. Even from a power dissipation standpoint, in a Class-D amplifier, the FETs are not operated in the linear region, so you don’t have the same device loading.