DUAL 105MW HEADPHONE AMPLIFIER WITH DIGITAL
VOLUME CONTROL AND SHUTDOWN MODE
The UTC LM4811 is a dual audio power amplifier with digital
volume control and shutdown mode function. It is featured in
unity-gain stability. The digital volume control sets the amplifier’s
gain from +12dB to -33dB in 16 discrete steps using a two-wire
interface. The shutdown mode is externally controlled, active-high
and micropower consumption. An internal thermal shutdown
protection circuit is contained in the device.
Operating on a 5V power supply, it can drive 16Ω load at
105mW per channel of continuous average power with 0.1% (THD+N).
This device is mainly used to provide customers with higher
quality output power but less required external components. The
UTC LM4811 reduces the use of bootstrap capacitors or snubber
networks that make making it ideal for low-power portable systems applications.
The UTC LM4811 is generally applied in cellular phones, MP3,
CD, DVD players, PDA’s and other portable electronics.