Features Available in space-saving LLP package Ultra low current shutdown mode BTL output can drive capacitive loads Improved pop & click circuitry eliminates noise during turn-on and turn-off transitions 2.2 - 5.5V operation No output coupling capacitors, snubber networks or bootstrap capacitors required Unity-gain stable External gain configuration capability Description The LM4992 is a stereo audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt, per channel, of continuous average power to an 8 BTL load with less than 1% distortion (THD+N) from a 5VDC power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4992 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement. The LM4992 features independent shutdown control for each channel and a low-power consumption shutdown mode, which is achieved by driving both shutdown pins with logic low. Additionally, the LM4992 features an internal thermal shutdown protection mechanism. The LM4992 contains advanced pop & click circuitry which eliminates noise which would otherwise occur during turn-on and turn-off transitions. The LM4992 is unity-gain stable and can be configured by external gain-setting resistors. Key Specification Improved PSRR at 217Hz & 1KHz 64dB (1KHz) Stereo Output Power at 5.0V, 1% THD, 8 1.07W (typ) Stereo Output Power at 3.3V, 1% THD, 8 420mW (typ) Shutdown Current, Vdd = 3.3V 0.2µA (typ) Applications Mobile Phones PDAs Portable electronic devices

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

Parameters Values Power@ 8Ohms, 1% THD 1.07 Watt THD 0.15 % PSRR 55 dB Channels 2 Channels Supply Range +2.2 - +5.5 V THD Conditions Vdd 5V, Po 0.5Wrms, f 1kHz PSRR Conditions Vr 200mV, Vdd 5V, terminated with 10ohm User Supply 5 Volt Shutdown Type Low Temperature Min -40 deg C Temperature Max 85 deg C

Datasheets

Title		Size	Date	Other Language
	LM4992 420mW Stereo Cell Phone Audio Amplifier	576 Kbytes	20-Feb-04

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM4992SD/NOPB LM4992SD RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 1000 AVNET-EM Worldwide 1000 DIGI-KEY Worldwide 2028 MOUSER Worldwide 960 TAYLOR Americas 1000	$0.70 each at 1K+ pcs	reel of 1000
LM4992SDX/NOPB LM4992SDX RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$0.70 each at 1K+ pcs	reel of 4500

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 LM4992.

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 LM4992 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM4992SDBD	420mW Stereo Cell Phone Audio Amplifier	Full production	Distributor Region Qty DIGI-KEY Worldwide 0	$200.00 each	1
The LM4992 is a stereo audio power amplifier capable of delivering 1 watt, per channel, of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply. The LM4992 features independent shutdown control for each channel and a low-power consumption shutdown mode, which is achieved by driving both shutdown pins with logic low. Additionally, the LM4992 features an internal thermal shutdown protection mechanism. This LM4992SDBD is an evaluation board designed to ease the evaluation and effort during the development of a circuit using the LM4992SD. It is an easy to use stand-alone board that requires power and GND, an input signal and an output load. Features: Available in space-saving LLP package Ultra low current shutdown mode BTL output can drive capacitive loads Improved pop & click circuitry eliminates noise during turn-on and turn-off transitions 2.2 - 5.5V operation No output coupling capacitors, snubber networks or bootstrap capacitors required Unity-gain stable External gain configuration capability Applications: Mobile Phones PDA's Portable electronic devices Contents: Fully Assembled LM4992SD Evaluation Board Instructions for where to locate and download the datasheet    Please note: application information and board layout can be found in datasheet

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM4992SD/NOPB LM4992SD	27.794 27.897	LLP	14	1 1	260 260	Detail	Download	N/A	ZXYTTE# L4992
LM4992SDX/NOPB LM4992SDX	27.794 27.897	LLP	14	1 1	260 260	Detail	Download	N/A	ZXYTTE# L4992

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 LM4992.

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 LM4992 is located at RoHS Status.

CAD Symbols and Models Download LM4992 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM4992SD	CMOS7	0	21301	0	0	1584000	3	449464325
LM4992SDX	CMOS7	0	21301	0	0	1584000	3	449464325

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 LM4992.

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 LM4992 is located at RoHS Status.