Features PC98 Compliant "Click and Pop" suppression circuitry Stereo line level outputs with mono input capability for system beeps Microphone preamp with buffered power supply DC Volume Control Interface Thermal shutdown protection circuitry Description The LM4834 is a monolithic integrated circuit that provides DC volume control, and a bridged audio power amplifier capable of producing 1.75W into 4 with less than 1.0% (THD). In addition, the headphone/lineout amplifier is capable of driving 70 mW into 32 with less than 0.1%(THD). The LM4834 incorporates a volume control and an input microphone preamp stage capable of driving a 1 k load impedance. Boomer® audio integrated circuits were designed specifically to provide high quality audio while requiring a minimum amount of external components in surface mount packaging. The LM4834 incorporates a DC volume control, a bridged audio power amplifier and a microphone preamp stage, making it optimally suited for multimedia monitors and desktop computer applications. The LM4834 features an externally controlled, low-power consumption shutdown mode, and both a power amplifier and headphone mute for maximum system flexibility and performance. Key Specification THD at 1.1W continuous average output power into 8 at 1kHz 0.5% (max) Output Power into 4 at 1.0% THD+N 1.75W (typ) THD at 70mW continuous average output power into 32 at 1kHz 0.1% (typ) Shutdown Current 1.0µA (max) Supply Current 17.5mA (typ) Applications Multimedia Monitors Desktop and Portable Computers

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

Datasheets

Title		Size	Date	Other Language
	LM4834 Boomer 1.75W Audio Power Amplifier with DC Volume Control and Microphone Preamp	497 Kbytes	20-Oct-04	日本語

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM4834MS	TPA6011A4	National Semiconductor	30 Nov 2009
LM4834MSX	TPA6011A4	National Semiconductor	30 Nov 2009