LM386 LM-386 Audio Amplifier Chip

An audio amplifier circuit built using the LM386 audio frequency amplifier IC. The circuit can be operated from a 9V battery or you can also use a 12V battery. The pin 1 and 8 is connected through the 10uF capacitor to increase gain of the circuit to 200, you can also replace this 10uF capacitor with a 1K variable resistor to get the required gain value between 20 to 200. The audio input points are also shown in the circuit from which you can connected the audio you want to amplify, the 10K variable resistor connected with the pin3, audio input and ground is used to adjust the audio of the circuit. An 8 ohms speaker is connected with the pin5 of the IC through a 220uF capacitor used as a filter.

LM386 IC Features / Technical Specifications:

• Low noise and low distortion circuitry
• Small Size (8 pin dip package)
• Quiescent power is only 24mW on a 6V supply
• The Current consumption is only 4mA in standby mode
• Operated with wide supply voltage from 4V to 18V
• External circuitry required only few parts
• Minimum to maximum voltage gain is from 20 to 200
• Also manufactured in VSSOP & SOIC packages.
• Max Output of LM386N-4 is 1000mW on 16V