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Small bench amplifier using LM386

2015-01-02 21:42  
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This article is a small bench using LM386  amplifier show. Efficient understood from the perspective of the theory, we suggest that you first understand the text, and then combine text plug. The small bench is a key component of the amplifier LM386. Next we introduce LM386. LM386 description is: 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 from 20 to 200.The inputs are ground referenced while the output automatically biases to one-half the supply voltage. The quiescent power drain is only 24 milliwatts when operating from a 6 volt supply.
LM386 is characterized by:
• Battery operation
• Minimum external parts
• Wide supply voltage range: 4V-12V
• Low quiescent current drain: 4mA
• Voltage gains from 20 to 200
• Ground referenced input
• Self-centering output quiescent voltage
• Low distortion: 0.2% (AV = 20, VS = 6V, RL = 8W, PO = 125mW, f = 1kHz)
• Available in 8 pin SOP package
LM386 applications are:
• AM-FM radio amplifiers
• Portable tape player amplifiers
• Intercoms
• TV sound systems
• Line drivers
• Ultrasonic drivers
• Small servo drivers
• Power converters

MiniBenchAmp  Mini bench amplifier (LM386)

Mini bench amplifier (LM386)