LM3875 practical circuit-dual power supply

875T and LM3876T are both 40W high-performance high-power amplifier integrated circuits. It
can output continuous average power in the frequency range of 20Hz - 20kHz at a load of 8fl, with a distortion of only 0.05%. Therefore, it
is the preferred power amplifier integrated circuit for manufacturers to design and manufacture high-fidelity audio equipment. The two circuits
have the same parameters except for slight differences in supply voltage range, slew rate and quiescent supply current. The circuit performance has good consistency and high reliability, and
is especially suitable for use in mass-produced electronic products. The electrical performance of these two power amplifier circuits is shown in Table 2-14.
    Figure 2-57 shows two application circuits of LM3875. As can be seen from the figure, the peripheral circuits of these two circuits are relatively simple and
their use is very flexible. oLM3875T can use dual power supplies or single power supplies.
    LM3875T: Power supply voltage range, dual power supply is ±10~±40V; quiescent current is about 30mA; when the power supply
voltage is ±35V, the load is G, and the distortion is 0.2%, the output power is 56W; the frequency range is When the output power is 20Hz～
20kHz and the output power is 40W, the total harmonic distortion plus noise is 0.05%; under standard working conditions, the frequency response is
SHz～100kHz (+0,25dB), and the signal-to-noise ratio reaches 115dB (A-weighted). The rate is 11V4150
    LM3876T: The power supply voltage range is ±7~±47V when taking the power supply; the quiescent current is about 40n1A (when mute is off);
the rest of the performance is the same as LM3875T, except that LM3876T has mute control, and LM 3875T has no mute function.