Features 1.1W (typ) output power with 8 mono BTL load 60mW (typ) output power with stereo 32 SE loads I2C programmable 32 step digital volume control Eight distinct output modes micro-SMD and LLP surface mount packaging "Click and Pop" suppression circuitry Thermal shutdown protection Low shutdown current (0.1uA, typ) Description The LM4856 is an audio power amplifier system capable of delivering 1.1W (typ) of continuous average power into a mono 8 bridged-tied load (BTL) with 1% THD+N and 60mW (typ) per channel of continuous average power into stereo 32 single-ended (SE) loads with 0.5% THD+N, using a 5V power supply. The LM4856 features a 32 step digital volume control and eight distinct output modes. The digital volume control and output modes are programmed through a two-wire I2C compatible control interface, that allows flexibility in routing and mixing audio channels. The LM4856 is designed for cellular phone, PDA, and other portable handheld applications. It delivers high quality output power from a surface-mount package and requires only eight external components. The industry leading micro SMD package only utilizes 2mm x 2.3mm of PCB space, making the LM4856 the most space efficient audio sub system available today. Key Specification THD+N at 1kHz, 1.1W into 8 BTL 1.0% (typ) THD+N at 1kHz, 60mW into 32 SE 0.5% (typ) Single Supply Operation 2.6 to 5.0V Applications Moblie Phones PDAs

Typical Application click for larger image	Connection Diagram click for larger image
Typical Performance click for larger image

Datasheets

Title		Size	Date	Other Language
	LM4856 Integrated Audio Amplifier System	1321 Kbytes	19-May-04

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM4856ITL	NONE	NONE	30 Nov 2009
LM4856ITLBD	LM4852ITLBD	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM4856ITLX	LM4852ITLX	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM4856LQ	NONE	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM4856LQX	LM4852ITLX	NATIONAL SEMICONDUCTOR	16 Nov 2008