Efficiency is shown in the following figures.

The test conditions for the results in Figure 2-1 through Figure 3-22 use a 4-Ω resistor, with heat sink, and no airflow.

Figure 2-1 Efficiency Graph With 1-kHz Sine-Wave Frequency and 0.73 Amplitude Modulation Ratio

Figure 2-2 Efficiency Graph With 1-kHz Sine-Wave Frequency and 1.0 Amplitude Modulation Ratio

Figure 2-3 Efficiency Graph With 1-MHz Switching Frequency and 0.73 Amplitude Modulation Ratio

Figure 2-4 Efficiency Graph With 384-kHz Switching Frequency and 0.73 Amplitude Modulation Ratio

Figure 2-5 Efficiency Graph With 2-MHz Switching Frequency and 0.73 Amplitude Modulation Ratio