LM4780 Dual 60W Audio Power Amplifier

This amplifier chip packs a big punch in a small package! It is capable of delivering 60 Watts RMS per channel into 8 Ohms for < 0.1% THD, or 0.03% THD at lower levels. It also has low noise (114 dB at 50 W), high power supply rejection ratio (120 dB), high gain bandwidth product (8 MHz) and high slew rate (19 V/uS).

The package is only 29.2mm x 15.7mm (1.15" x 0.618") in size. The two differential-input high-gain amplifiers are on two separate silicon dice and have independent pin connections. The die are exactly the same as the one used in the LM3886 amplifier chip.

The LM4780 requires only a hand-full of external components to configure a DC-blocking input filter, a gain-setting feeback network, and a Zobel filter on the output to provide a load at high frequencies. It has the SPiKe (tm) overload protection circuitry and it can be easily bridged for 120 Watts or paralleled for low impedance loads (less than 4 Ohms).

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