LM4766 is a two-channel high-fidelity power amplifier from NS Company

LM 4766 is a two-channel high-fidelity power amplifier from NS Company . It has two packaging forms. Among them, LM4766T is a non-insulated package and can obtain an average power output of 40W The average power of 30WX2 is obtained. Its harmonic distortion plus noise is less than 0.06% under 8 ohm load. Each channel has an independent smooth fade-in and fade-out squelch function to reduce the current impact when turning on and off, and has a wide voltage range. Range, 20V-78V (VEE+VCC), using 15-pin TO-22O package. Minimal external components, and with complete protection function (SPIKE PROTECTION), can be widely used in various types of high-fidelity audio equipment. The following are The appearance diagram and package size diagram of LM4766 and the typical electrical parameters of the circuit are as follows:

Gain Bandwidth Product (GBWP): 8 MHZ

Slew rate (SLEW RATE):9V/us

Total harmonic distortion plus noise (THD+N): 0.06%

Total quiescent current: 48mA

Common mode rejection ratio (CMRR): 110dB

Open loop gain (Av):115dB

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The following figure is a typical application circuit diagram of this integrated circuit

The following figure is a typical application circuit diagram of this integrated circuit (BTL mono)

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The characteristic of LM4766 is warm tone, similar to the tone of tube amplifier. It is similar to LM1875, but it is larger in power than LM1875. I personally think it is an upgraded product of LM1875, and it is also one of the most popular integrated ICs currently recommended by many audiophiles. 1. Especially for those who like the sound of LM1875

It is a good choice to use it. From the DATASHEET, the official website of NS in the United States, the peripheral circuits of LM4766 and LM1876 are the same. The only difference is that the on/off mute control circuit is different. This means that the same PCB board can be used to universally use LM4766. and LM 1876 create conditions,