Features • PC98 Compliant • DC Volume Control Interface • System Beep Detect • Stereo switchable bridged/single-ended power amplifiers • Selectable internal/external gain and bass boost configurable • "Click and pop" suppression circuitry • Thermal shutdown protection circuitry Description The LM4835 is a monolithic integrated circuit that provides DC volume control, and stereo bridged audio power amplifiers capable of producing 2W into 4 with less than 1.0% THD or 2.2W into 3 with less than 1.0% THD. Boomer® audio integrated circuits were designed specifically to provide high quality audio while requiring a minimum amount of external components. The LM4835 incorporates a DC volume control, stereo bridged audio power amplifiers and a selectable gain or bass boost, making it optimally suited for multimedia monitors, portable radios, desktop, and portable computer applications. The LM4835 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 PO at 1% THD+N   into 3 (LM4835LQ, LM4835MTE) 2.2W (typ) into 4 (LM4835LQ, LM4835MTE) 2.0W (typ) into 8 (LM4835) 1.1W (typ) Single-ended mode - THD+N at 85mW into 32 1.0% (typ) Shutdown current 0.7µA (typ) Applications • Portable and Desktop Computers • Multimedia Monitors • Portable Radios, PDAs, and Portable TVs

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

Datasheet

Title		Size	Date	Other Language
	LM4835 Boomer ® Audio Power Amplifier Series Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain	917 Kbytes	10-Feb-03	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
LM4835MT/NOPB LM4835MT RoHS	TSSOP	Lifetime buy Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 40 DIGIKEY Worldwide 54 RS COMPONENTS Worldwide 2	$1.91 each at 1K+ pcs	rail of 48
LM4835MTX/NOPB RoHS	TSSOP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$1.91 each at 1K+ pcs	reel of 2500
LM4835MTE/NOPB RoHS	TSSOP EXP PAD	Lifetime buy Lead Time: 12 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$1.70 each at 1K+ pcs	rail of 48
LM4835MTEX/NOPB LM4835MTEX RoHS	TSSOP EXP PAD	Lifetime buy Lead Time: 12 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$1.70 each at 1K+ pcs	reel of 2500

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM4835LQ	LM4838MTE	NATIONAL SEMICONDUCTOR	05 Mar 2008
LM4835LQBD	LM4857ITLBD	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM4835LQX	NONE	NATIONAL SEMICONDUCTOR	04 May 2006
LM4835MT	NONE	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM4835MTE	NONE	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM4835MTEX	NONE	NATIONAL SEMICONDUCTOR	01 Dec 2009

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM4835MT	CS065	2	38968	52	0	4402000	1	1249079519
LM4835MTE	CS065	2	38968	52	0	4402000	1	1249079519
LM4835MTEX	CS065	2	38968	52	0	4402000	1	1249079519
LM4835MTX	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
LM4835LQ	LM4838MTE	NATIONAL SEMICONDUCTOR	05 Mar 2008
LM4835LQBD	LM4857ITLBD	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM4835LQX	NONE	NATIONAL SEMICONDUCTOR	04 May 2006
LM4835MT	NONE	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM4835MTE	NONE	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM4835MTEX	NONE	NATIONAL SEMICONDUCTOR	01 Dec 2009