LPA400 User Guide
Note:The amplifier contains an output rms current protection circuit, and
when driving some capacitive loads this circuit may be activated. Due to
capacitor construction, at high current the amount of energy transfer
distorts the current waveform resulting in excessive peak current (Fig 1
below), whilst the rms value remains within specification. To ensure
correct functionality and prevent false triggering of the protection circuit,
ideally, the current waveform should be a sinewave as pictured in (Fig.2
below).
Fig 1 (Distorted current waveform)
Fig 2 (Correct current waveform)