LM4782 Datasheet | National Semiconductor

Description The LM4782 is a three channel audio amplifier capable of typically delivering 25W per channel of continuous average output power into an 8Ω load with less than 0.5% THD+N from 20Hz - 20k Hz. The LM4782 is fully protected utilizing National’s Self Peak Instantaneous Temperature (˚Ke) (SPi Ke TM) protection circuitry. SPi Ke provides a dynamically optimized Safe Operating Area (SOA). SPi Ke protection pletely 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 Specifications j Output Power/Channel with 0.5% THD+N, 1k Hz into 8Ω j THD+N at 3x15W into 8Ω (20Hz - 20k Hz) j THD+N at 3x15W into 6Ω (20Hz - 20k Hz) j THD+N at 3x15W into 4Ω (20Hz - 20k Hz) j Mute Attenuation j PSRR j Slew Rate 25W (typ) 0.2% (typ) 0.3% (typ) 0.4% (typ) 115d B (typ) 85d B (min) 18V/µs (typ) Features n n n n n n SPi Ke Protection Low external ponent count Quiet fade-in/out mute mode Low power standby mode Wide supply range: 20V - 64V Signal-to-Noise Ratio ≥ 98d B (ref. to PO = 1W) Applications n n n n n Audio Audio Audio Audio Audio amplifier amplifier amplifier amplifier amplifier for for for for for ponent stereo pact stereo home theater in a box (HTB) self-powered speakers high-end and HD TVs Typical Application 200811D2 FIGURE 1. Typical Audio Amplifier Application Circuit SPi Ke™ Protection and Overture™ are trademarks of National Semiconductor Corporation. © 2004 National Semiconductor Corporation DS200811 .national. Connection Diagrams Plastic Package (Note...