Features SPiKe Protection Low external component count Quiet fade-in/out mute mode Low power standby mode Wide supply range: 20V - 64V Signal-to-Noise Ratio >= 98dB (ref. to PO = 1W) Description The LM4782 is a three channel audio amplifier capable of typically delivering 25W per channel of continuous average output power into an 8 load with less than 0.5% THD+N from 20Hz - 20kHz. The LM4782 is fully protected utilizing National's Self Peak Instantaneous Temperature (°Ke) (SPiKeTM) protection circuitry. SPiKe provides a dynamically optimized Safe Operating Area (SOA). SPiKe protection completely safeguards the LM4782's outputs against over-voltage, under-voltage, overloads, shorts to the supplies or GND, thermal runaway and instantaneous temperature peaks. The advanced protection features of the LM4782 places it in a class above discrete and hybrid amplifiers. Each amplifier of the LM4782 has an independent smooth transition fade-in/out mute and a power conserving standby mode. The mute and standby modes can be controlled by external logic. The LM4782 can easily be configured for bridge or parallel operation for higher power and bi-amp solutions. Key Specification Output Power/Channel with 0.5% THD+N, 1kHz into 8 25W (typ) THD+N at 3x15W into 8 (20Hz - 20kHz) 0.2% (typ) THD+N at 3x15W into 6 (20Hz - 20kHz) 0.3% (typ) THD+N at 3x15W into 4 (20Hz - 20kHz) 0.4% (typ) Mute Attenuation 115dB (typ) PSRR 85dB (min) Slew Rate 18V/µs (typ) Applications Audio amplifier for component stereo Audio amplifier for compact stereo Audio amplifier for home theater in a box (HTB) Audio amplifier for self-powered speakers Audio amplifier for high-end and HD TVs

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

Parameters Values Power@ 4Ohms, 1% THD 32 Watt Power@ 8Ohms, 1% THD 25 Watt Power@ 4Ohms, 10% THD 40 Watt Power@ 8Ohms, 10% THD 30 Watt THD 0.2 % PSRR 115 dB SNR 98 dB Channels 3 Channels THD Conditions Po=15W, f=20kHz, Av=26dB, V=25V, Rl=8Ohms PSRR Conditions V+=25V-10V,V-=-25V Vcm=0V, Io=0mA SNR Conditions Po=1Wrms;A-Weighted Filter;fin=1kHz, Rs=25Ohms User Supply 25 Volt Supply Range +20 - +64V Mute/Shutdown Mute and standby Mono/Stereo 3 Ch Gain Bandwidth 7.5 MHz Slew Rate 18 Volts/usec Temperature Min -20 deg C Temperature Max 85 deg C

Datasheets

Title		Size	Date	Other Language
	LM4782 3 Channel 25W Audio Power Amplifier with Mute and Standby	1542 Kbytes	23-Mar-06

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM4782TA/NOPB LM4782TA RoHS Status	TO-220	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 58 DIGI-KEY Worldwide 105 MOUSER Worldwide 60 TAYLOR Americas 58	$6.86 each at 1K+ pcs	rail of 15

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 LM4782.

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 LM4782 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM4782TABD	3 Channel 25W Audio Power Amplifier with Mute and Standby	Full production	Distributor Region Qty DIGI-KEY Worldwide 0	$171.00 each	1
The LM4782 is a three channel audio amplifier capable of typically delivering 25W per channel of continuous average output power into an 8? load with less than 0.5% THD+N from 20Hz to 20kHz. The LM4782 is fully protected utilizing National's Self Peak Instantaneous Temperature (ºKe) (SPiKe™) protection circuitry which completely safeguards its outputs against over-voltage, under-voltage, overloads, shorts to the supplies or GND, thermal runaway and instantaneous temperature peaks.

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
LM4782TA/NOPB LM4782TA	7411.708 7419.508	TO-220	27	1 1	NA NA	Detail	Download	N/A	NSUZXYTTE# LM4782TA

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 LM4782.

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 LM4782 is located at RoHS Status.

CAD Symbols and Models Download LM4782 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM4782TA	HV700	0	14255	0	0	1582500	3	449038695

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 LM4782.

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 LM4782 is located at RoHS Status.