User guide

DS679F1 77
CS42L51
7.2 Headphone Amplifier Efficiency
The architecture of the headphone amplifier is that of typical class AB amplifiers. Test conditions (unless
otherwise specified): Input test signal is a 997 Hz sine wave; Power Consumption Mode 6 - Stereo Playback
w/16 Ω load. HP_GAIN = 1.1430. Best efficiency is realized when the amplifier outputs maximum power.
Figure 31. Power Dissipation vs. Output Power into Stereo 16 Ω
VA_HP = VA = 1.8 V
Figure 32. Power Dissipation vs. Output Power into Stereo 16 Ω (Log Detail)
VA_HP = VA = 1.8 V