On this slide the driving waveforms for a BTL output and a PWM switched output are shown side by side. Notice how smooth the output current is for the BTL drive on the left. The slow rise and fall of the output voltage leaves the transistors in their linear region and results in more power usage in the driver. The LV8068V used for the BTL drive is also capable of PWM driving via an external input pin. On the right can be seen PWM driven waveforms. Notice in the lower right the quick switching of the output transistors. This causes less power to be dissipated in them and results in lower power consumption. The disadvantage is the more noisy output current waveform seen in the lower right Iout waveform.