LM4766T/NOPB Integrated Circuits (ICs)

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The LM4766T/NOPB is a high performance, mono, audio power amplifier with thermal protection designed and optimized specifically to meet the versatile requirements of the professional audio market. This revolutionary amplifier featuring exceptionally low noise, low distortion, and minimal output power, may be configured both single-ended and bridge-tied, thus making it ideal for stereo audio applications.

The LM4766T/NOPB operates on a single +25V supply, allowing for industry leading low voltage operation. The amplifier runs Class AB Gain Selectable: 1x(R1=R2= ∞value) or 2x(R1=R2=0). It features a fixed gain of 24dB or adjustable from +12 to +24dB and provides a maximum output power of up to 125 Watts, protected from thermal and current overloads.

The LM4766T/NOPB amplifier includes an internal, temperature-dependent rise and fall control network, which provides output voltage swing of both positive and negative (+/-25V) at 10Vrms. Adjustable gain and distortion are easily achieved by adding a resistor to the input stage, while the total harmonic distortion (THD) is kept to 0.03% maximum at 1Vrms input and 10Vrms output.

The LM4766T/NOPB is ideal for audio applications where high power output, low noise and distortion, low voltage operation, and low cost are desired. It is suitable for low impedance and high impedance audio applications and may be used in professional recording, sound reinforcement, and consumer electronics such as audio amplifiers, loudspeakers, televisions and radios.

The LM4766T/NOPB works thanks to its working principle that consists of two stages: the input stage and the output stage. The input stage consists of a single-ended/push-pull input stage and a differential/common-mode input stage for both balanced and unbalanced inputs. The output stage consists of two power transistors connected in a common-emitter configuration. The output stage provides the high-power audio output signal and control signals to protect the device from thermal and current overloads.

The LM4766T/NOPB is a versatile amplifier with its adjustable gain, low distortion and power both single-ended and bridge-tied audio applications. This amplifier delivers high power and low distortion, good thermal protection and low operating voltage, suitable for use in professional and consumer audio systems. This LM4766T/NOPB application field and working principle makes it an ideal choice for stereo audio applications.

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