LM386
Audio power amplifier
LM386 is an audio integrated power amplifier, which has the advantages of low power consumption, adjustable update inner chain gain, large power supply voltage range, few external components and low total harmonic distortion. It is widely used in recorders and radios. The LM386M-1 and LM386MX-1 are power amplifiers designed for low-voltage consumer applications. LM386 is an audio power amplifier produced by National Semiconductor Corporation of the United States, which is mainly used in low-voltage consumer products. To minimize peripheral components, the voltage gain is built in as 20. However, by adding an external resistor and capacitor between pin 1 and pin 8, the voltage gain can be adjusted to any value up to 200. The input terminal is referenced to the ground, and the output terminal is automatically biased to half of the power supply voltage. Under the 6V power supply voltage, its static power consumption is only 24mW, making the LM386 particularly suitable for battery powered occasions.
