Features No output coupling capacitors, bootstrap capacitors, or snubber circuits are necessary Small Outline (SO) packaging Compatible with PC power supplies Thermal shutdown protection circuitry Unity-gain stable External gain configuration capability Description The LM4861 is a bridge-connected audio power amplifier capable of delivering 1.1W of continuous average power to an 8 load with 1% THD+N using a 5V power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components using surface mount packaging. Since the LM4861 does not require output coupling capacitors, bootstrap capacitors, or snubber networks, it is optimally suited for low-power portable systems. The LM4861 features an externally controlled, low-power consumption shutdown mode, as well as an internal thermal shutdown protection mechanism. The unity-gain stable LM4861 can be configured by external gain-setting resistors for differential gains of up to 10 without the use of external compensation components. Higher gains may be achieved with suitable compensation. Key Specification THD+N for 1kHz at 1W continuous average output power into 8 1.0% (max) Output power at 10% THD+N at 1kHz into 8 1.5W (typ) Shutdown Current 0.6µA (typ) Applications Personal computers Portable consumer products Self-powered speakers Toys and games

Also Recommended LM4834▲ Combines Functionality Of The LM4861 And LM4880

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

Datasheets

Title		Size	Date	Other Language
	LM4861 1.1W Audio Power Amplifier with Shutdown Mode	278 Kbytes	4-Feb-03	日本語

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM4861M/NOPB LM4861M RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 509 AVNET-EM Worldwide 563 DIGI-KEY Worldwide 2881 FARNELL Europe and Asia 1508 MOUSER Worldwide 412 NEWARK Americas 470 RS COMPONENTS Worldwide 90 TAYLOR Americas 1839	$0.64 each at 1K+ pcs	rail of 95
LM4861MX/NOPB LM4861MX RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 7400 AVNET-EM Worldwide 2500 DIGI-KEY Worldwide 3007 FARNELL Europe and Asia 2182 MOUSER Worldwide 2500 NEWARK Americas 2182 TAYLOR Americas 7400 TECHMOSA Asia Pacific 5000	$0.64 each at 1K+ pcs	reel of 2500

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM4861.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM4861 is located at RoHS Status.

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM4861M/NOPB LM4861M	69.761 70.001	SOIC NARROW	8	1 1	260 235	Detail	N/A	N/A	NSZXTT LM 4861M
LM4861MX/NOPB LM4861MX	69.761 70.001	SOIC NARROW	8	1 1	260 235	Detail	N/A	N/A	NSZXTT LM 4861M

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM4861.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM4861 is located at RoHS Status.

CAD Symbols and Models N/A

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM4861M	CS065	2	47473	43	0	5527000	1	1568301341
LM4861MX	CS065	2	47473	43	0	5527000	1	1568301341

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.

For more information on Reliability Metrics, please click here.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM4861.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM4861 is located at RoHS Status.