Small signal amplifier is a kind of voltage amplifier, it provide enhanced amplifier signal by the load voltage, or power amplifier power or large signal. With large signal current to the current operation of the load is motor and speakers. In the audio system, compared with other operational amplifiers, the amplifier can provide high current. This means that the load used current cannot directly by general amplifier output driver. This article discussed the IC LM380 overview of audio amplifier and its application.

What is a LM380 audio amplifier?
LM380 IC is a kind of is mainly used for audio amplification of the audio power amplifier. The interior design of the IC can be fixed by design personnel, such as 34 db. The IC consists of a copper lead frame, the IC features include a wide range of supply, small distortion; Higher peak current. In addition, the IC with high I/p impedance, voltage gain, low consumption, etc. The IC because of its high performance and cost effectiveness and become the most commonly used devices.



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The integrated circuit

LM380 specifications
The IC specifications below.

For 10 v to 222 v power supply voltage range
Standard DIP
Low power consumption 0.13 W
Less distortion
Input impedance is as high as 50 k Ω
Fixed voltage gain of 50
Current supply capacity is 1.3 A
The ratings
We know that we always need power to operate equipment, and the power supply characteristics mainly depends on the rating of the equipment. The rating of IC is mainly include the following content.



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Functional diagram

Power supply voltage of 22 v
The input voltage 30 v
Working temperature of 0.3 to 6.3 V
The junction temperature of 1500 c
Storage temperature from 65 to 1500 c
Peak current is + or - 1 a
The pin configuration of LM380 audio amplifier
The IC pin configuration includes the following content. The IC consists of 14 pins, every pin has its significance. The following is a list of these pins. In the IC, some 6 pins have the function of the familiar with, namely the GND pin. When we want from the device to obtain accurate results, these pins plays an important role.



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The pin configuration of LM380 audio amplifier

Pin 1: is this bypass pin
Input pin 2: in phase
Pin 3: this is a ground pin
Pin 4: this is a ground pin
Pin 5: this is a ground PI
Pin 6: inverting input
Pin 7: this is a ground pin
Pin 8: this is a ground pin
Pin 9: NC
Pin 10: this is the GND pin
Pin 11: this is a ground pin
Pin12: this is a ground pin
Pin 13: normally closed
Pin14: + VCC
This pinout diagram can help us identify pin configuration of the equipment. So before using it, we have to look at the pin.