Overview
The LA4905 is a BTL 2-channel power amplifier IC for use in car audio systems. Increases in the number of external components are held to a minimum by adopting both a signal-following type switching scheme in the amplifier’s output stage power supply, and a newly-developed nonlinear amplifier that has nonlinear characteristics in the signal system.

Features
• Power dissipation reduced by 50% (When average music power is measured, and when compared to earlier Sanyo products.)
• The number of required signal follower circuits has been reduced to a single circuit for two channels, allowing the number of external components to be reduced.
• The output is a pure analog signal: no switching noise is output to the output lines.
• Operates on an 8 to 18-V single-voltage power supply.
• Full complement of built-in protection circuits (shorting to the power supply, shorting to ground, overvoltage, and thermal protection)
• Built-in standby switch