LME49811

LME49811 www.ti.com SNAS394C – DECEMBER 2007 – REVISED APRIL 2013 LME49811 Audio Power Amplifier Series High Fidelity 200 Volt Power Amplifier Input Stage with Shutdown Check for Samples: LME49811 FEATURES 1 2 Very High Voltage Operation Scalable Output Power Minimum External Components External Compensation Thermal Shutdown APPLICATIONS Powered Subwoofers Pro Audio Powered Studio Monitors Audio Video Receivers Guitar Amplifiers High Voltage Industrial Applications DESCRIPTION The LME49811 is a high fidelity audio power amplifier input stage designed for demanding consumer and pro-audio applications. Amplifier output power may be scaled by changing the supply voltage and number of output devices. The LME49811 is capable of driving an output stage to deliver in excess of 500 watts single-ended into an 8 ohm load in the presence of 10% high line headroom and 20% supply regulation. The LME49811 includes thermal shut down circuitry that activates when the die temperature exceeds 150°C. The LME49811's shutdown function when activated, forces the LME49811 into shutdown state. KEY SPECIFICATIONS Wide Operating Voltage Range: ±20V to ±100V PSRR (f = DC): 115dB (Typ) THD+N (f = 1kHz): 0.00035% (Typ) Output Drive Current: 9mA TYPICAL APPLICATION RF 56 k: CIN RIN 10 PF 1.8 k: Ci Ri 10 PF 1.8 k: +VCC CS+ 0.1 PF CC 30 pF IN- - Source IN+ + Sink RS +5V 56 k: RM 1.4 k: SD Shutdown Circuitry GND 0.1 CS PF + -VEE +VCC RB2 1.2 k: RB1 500: ...