GS290 Operational Description Revision B
LG Electronics 46/136 LGE Property
3.12.1. Audio amplifier
Audio amplifier sub system IC is an audio power amplifier capable of delivering 1.25W of continuous average
power into a mono 8Ω load, 42mW per channel of continuous average power into stereo 32Ω single-ended (SE)
loads. The LM49151 features digital volume control and ten distinct output modes. The digital volume control,
output modes (mono/SE/OCL) are programmed through a two-wire I2C interface that allows flexibility in
routing and mixing audio channels.
Figure 15 Audio amplifier PMIC
3.12.2. Microphone circuit
Figure 16 Microphone circuit
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