Hello, readers welcome to the new post. In this post, we will learn the Introduction to LM386 Audio Amplifier IC. There are fewer volts applications where LM386 is employed. The value of resistance offered by the four to thirty-two ohms operates through this module Its gain value normally lies at twenty but can be enhanced from twenty to two hundred.
It has eight pinouts. In this post, we will discuss its working pinout and some other related features. So let’s get started.
Introduction to LM386 Audio Amplifier IC
- LM386 is the part of small-level audio amplifier circuits that needs less value of frequency.
- ability to operate on small power uses a nine-volt battery to function.
- It can operate at the eight-ohm audio device having a gain value of twenty to two hundred.
- Control of volume level and gain can be done through this module. There are eight pinouts configured on this device
- To operate a speaker having eight-ohm resistance can be run through this module.
- LM386 comes in 8 pins dual in-line packages. The voltage gain of amplifiers can be set to about 20 and increase to 200 through the use of external components such as resistors and capacitors in between Pin 1 to 8.
- Based on the type of component, the use of 9 Volt power supply amplifiers can provide output power of about 0.25W to 1W.
LM386 Pinout
- There are eight pinouts of this IC that are described here
- Pin 1, 8 is a gain that is used to adjust the gain value of ic through making a connection to the capacitor.
- Pin 2 is inverting input and link to the ground
- Pin 3 noninverting that is linked to the audio signal
- Pin 4 is ground
- Pin 5 is the output that gives the output signal
- Pin 6 is Vcc where input supply is given
- Pin 7 is a bypass where the decoupling capacitor is link
| Pin Number | Pin Name |
| 1 | Gain |
| 2 | Input – |
| 3 | Input + |
| 4 | GND |
| 5 | Vout |
| 6 | Vs |
| 7 | Bypass |
| 8 | Gain |
- Pin 1 and 8 are gain control terminal of amplifiers. They are points where we can set gain with the use of a resistor and capacitor between these pins.
- Pin 2 and 3 work as sound input signal pins. They are pins where we can put sound that is used for amplification. Pin 2 is negative and pin 3 is positive.
- Pin 4 is ground and connected with the ground
- PIn 5 shows the output of the amplifiers and amplified signal.
- Pin 6 gets positive DC voltage so amplifiers can get the requried power for amplification signals.
- Pin 7 is bypass terminal
LM386 Features
- The Main Features of LM386 are listed here
- It comes with MSOP packaging having eight pinout
- Its power value is one twenty milliwatts and its frequency is 1-kilo hertz
- Offered less distortion about 0.2 percent
- Gain is twenty to two hundred
- The current drain is four milliampere
- The wide supply voltage range is four to twelve volts.
- PSRR is fifty decibels
- Working voltatge value can be4V-12V or 5 V-18V (Based on model)
- Voltage gain values are about 20 to 200
- it comes in a package of MSOP
- The operating temperature is about 0 -70˚C
- Low Distortion is 0.2%
- Input is referenced by ground
- Battery needed for operation
- Minimum external components used for circuit creation
- The low static power drain value is about 4mA
- Self-concentric output static voltage
- The speaker impedance value is 4Ω
How to Control Gain for LM386 IC?
- LM386 IC is made in such a configuration that pins 1 and 8 are used for gain control features that can be set externally. It can used for good IC responses.
- If control pins are not connected, the inner resistor 1.35kiloohm adjusts the gain of IC by about 20. if capacitors are connected to the control pin gain will be 200.
- So the gain of LM386 IC can be controlled through the connection of POT in a series combination with capacitors about pins 1 and 8
Electrical Features of LM386 IC
According to the model voltage gain of the IC 386 amplifier has a value of 20 to 200 through providing a voltage value of 4V-12V or 5V-18V.
3 models are used for this type of amplifier LM386N-1, LM386N-3, and LM386N-4. the value of their electrical features can seen here
LM386 Applications
- LM386’s main applications are described here
- It used in circuits of the power converter
- Used in small-size servo motor driver circuits
- Ultrasonic circuits used in this module
- Tape players amplifier used this module
- Radio amplifiers consist of this IC
Faqs
What is LM386 IC?
- LM386 is a power amplifier made for using low-voltage projects. The gain value is set to 20 to keep the external component count low and adding of resistor and capacitor between pin 1 and 8 increases gain by about 200
What is the introduction of audio amplifier?
- The audio amplifier increases the amplitude of small signals to high values, while maintaining small signal values. it is called linearity the high amplifier linearity will provide more output signal according to the input
What class of amp is LM386?
- It is a class AB power amplifier which means a push-pull design where the transistor amplifies the corresponding half wave.
What is an audio gain function?
- Gain is the amount of audio signal enhanced with amplifiers and expressed in decibels value. it is the ratio between input volume and output volume and it sets the tone of the sound before gets processed.
Read also
That is all about the LM386 Audio Amplifier IC. Every parameter related to this module is explained if you have any further queries ask in the comment see you in the next post have a nice day
