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

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

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

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

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM4782TA	HV700	0	13850	0	0	1492500	3	423500950

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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