Only For Training And Service Purposes - LG CT815 Service Manual

3. TECHNICAL BRIEF
3.13.2.2 LM49100 audio interface
The LM49100 is a fully integrated audio subsystem capable of delivering 1.275W of continuous
average power into a mono 8Ω bridged-tied load (BTL) with 1% THD+N and with a 5V power supply.
The LM49100 also has a stereo true-ground headphone amplifier capable of 50mW per channel of
continuous average power into a 32Ω single-ended (SE) loads with 1% THD+N.
The LM49100 has three input channels. One pair of SE inputs can be used with a stereo signal. The
other input channel is fully differential and may be used with a mono input signal.
The LM49100 features a 32-step digital volume control and ten distinct output modes. The mixer,
volume control, and device mode select are controlled through an I2C compatible interface.
Thermal overload protection prevent the device from being damaged during fault conditions. Superior
click and pop suppression eliminates audible transients on power-up/down and during shutdown.
LGE Internal Use Only
Figure. Detailed diagram of LM49100 audio interface
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Only for training and service purposes