[Datasheet] LM386 : Low Voltage Audio Power Amplifier

The LM386 is a power amplifier designed for use in low voltage
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.
The inputs are ground referenced while the output is automatically
biased to one half the supply voltage. The quiescent
power drain is only 24 milliwatts when operating from a

 

6 volt supply, making the LM386 ideal for battery operation.

저전압 스피커설계시 주로 사용하는 Amp입니다 ^^

나중에 USB전원으로 동작하는 관련회로도도 포스팅해보겠습니다~

LM386.pdf