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

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

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

Featured Application Notes

Title		Size	Date	Other Language
	AN-1645: Application Note 1645 LM4702 Driving a MOSFET Output Stage	655 Kbytes	24-May-07	中文
	AN-1490: Application Note 1490 LM4702 Power Amplifier	1033 Kbytes	26-May-06	中文

More Application Notes

Title		Size	Date	Other Language
	AN-1645: Application Note 1645 LM4702 Driving a MOSFET Output Stage	655 Kbytes	24-May-07	中文
	AN-1490: Application Note 1490 LM4702 Power Amplifier	1033 Kbytes	26-May-06	中文

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LM4834MS/NOPB RoHS		Lifetime buy Lead Time: 12 weeks	Distributor Region Qty DIGIKEY Worldwide 39	$2.00 each at 1K+ pcs	rail of 47
LM4834MSX/NOPB RoHS		Lifetime buy Lead Time: 16 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$2.00 each at 1K+ pcs	reel of 2000

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

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM4834MS	CS065	2	38968	52	0	4402000	1	1249079519
LM4834MSX	CS065	2	38968	52	0	4402000	1	1249079519

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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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