Part Number: LM356
Function: LOW Voltage Audio Power Amplifier
Package: DIP, SOP 8 Pin Type
An audio power amplifier is an electronic device that increases the amplitude of an audio signal to drive a loudspeaker or other types of audio output devices. Its primary purpose is to take a low-power audio signal from a source, such as a microphone, CD player, or audio processor, and boost it to a level sufficient to drive speakers and produce audible sound.
Here are some key points:
1. Amplification: The main function of a power amplifier is to amplify the audio signal while maintaining its fidelity. This means that it should increase the voltage or current of the signal without introducing significant distortion or noise.
2. Signal Types: Audio power amplifiers typically handle analog audio signals, which can be in the form of voltage or current. They are commonly used in various audio systems, including home stereo systems, car audio systems, public address (PA) systems, and professional audio equipment.
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 ouput is automatically biased to one half the supply voltage.
1. Battery operation
2. Minum external parts
3. Low quiescent current drain 4mA
4. Ground referenced input
1. AM-FM radio amplifier
2. TV sound systems
3. Ultrasonic drivers
4. Power inverters.