LM831

LM831 Low Voltage Audio Power Amplifier December 1994 LM831 Low Voltage Audio Power Amplifier General Description The LM831 is a dual audio power amplifier optimized for very low voltage operation The LM831 has two independent amplifiers giving stereo or higher power bridge (BTL) operation from two- or three-cell power supplies The LM831 uses a patented compensation technique to reduce high-frequency radiation for optimum performance in AM radio applications This compensation also results in lower distortion and less wide-band noise The input is direct-coupled to the LM831 eliminating the usual coupling capacitor Voltage gain is adjustable with a single resistor Features Y Y Y Y Y Low voltage operation 1 8V to 6 0V High power 440 mW 8X BTL 3V Low AM radiation Low noise Low THD Applications Y Y Y Y Portable tape recorders Portable radios Headphone stereo Portable speakers Typical Application Dual Amplifier with Minimum Parts TL H 6754 – 1 AV e 46 dB BW e 250 Hz to 35 kHz POUT e 220 mW Ch RL e 4X C1995 National Semiconductor Corporation TL H 6754 RRD-B30M115 Printed in U S A Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage VS Input Voltage VIN Power Dissipation (Note 1) PD Operating Temperature (Note 1) Topr 7 5V g 0 4V 1 3W (M Package) 1 4W (N Package) b 40 C to a 85 C Storage Temperature Tstg Junction Temperature Tj...