What is LM386 amplifier?
What is LM386 amplifier?
The LM386 is a low power audio frequency amplifier which is very commonly used in small audio amplifiers. The IC consumes very less power and hence can be operated using a 9V battery easily. It can easily drive an 8-ohm speaker with a variable gain of 20 to200. Volume control and gain control is also possible in this.
Why LM386 is used in audio amplifier?
LM386 IC has been in use for decades and is still being used as Amplifier in Computer speakers and Portable Stereos. From the pin diagram, it is clear that LM386 is a simple Amplifier IC with possibly minimum external connections….Introduction to LM386.
| Pin Number | Pin Name | Function |
|---|---|---|
| 8 | Gain | Gain Setting Pin |
How many watts is LM386?
The IC consists of an 8-pin dual in-line package (DIP-8) and can output 0.25 to 1 watts of power, depending on the model, using a 9-volt power supply.
What class is LM386 amplifier?
3 LM386 Output Stage: It is a class AB power amplifier, that is to say, a push-pull configuration where each transistor amplifies its corresponding half wave.
How do you set a gain in LM386?
To make the LM386 a more versatile amplifier, two pins (1 and 8) are provided for gain control. With pins 1 and 8 open the 1.35 kΩ resistor sets the gain at 20 (26 dB). If a capacitor is put from pin 1 to 8, bypassing the 1.35 kΩ resistor, the gain will go up to 200 (46 dB).
What can replace LM386?
Some alternative ICs you can use are LM380, TDA2822M, NJM2073 and MC34119.
What is the voltage supply of the LM386 power amplifier?
6 volt supply
The quies- cent power drain is only 24 milliwatts when operating from a 6 volt supply, making the LM386 ideal for battery operation.
What is the gain of LM386?
The LM386 is a power amplifier designed for use in low volt- age consumer applications. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value up to 200.
