LM386 Audio Power Amplifier

Low Voltage Audio Power Amplifier learn more.

Part number : LM386

Functions : Audio Power Amplifier

Package information : DIP 8 Pin, SOIC 8 Pin

Manufacturer : TI, National Semicondcutor

Image :

LM386 Audio Power Amplifier



LM386 is an integrated circuit (IC) widely used as a low-power audio amplifier.

LM386 operates from a single power supply and performs the function of amplifying the input signal and passing it to the output. This allows you to amplify sound from small audio devices or speakers.

The device internally has components such as a voltage amplifier, a current amplifier, and an output pin that can be connected to an output speaker. This amplifies the input signal and transmits it to the output speaker.

It is used in a variety of applications including portable audio devices, radios, and amplifier modules. Additionally, it has an internal gain control pin, allowing the user to adjust the degree of amplification desired.

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



1. Battery operation

2. Minimum external parts

3. Wide supply voltage range: 4V–12V or 5V–18V

4. Low quiescent current drain: 4 mA

5. Voltage gains from 20 to 200

6. Ground referenced input

7. Self-centering output quiescent voltage

8. Low distortion



1. AM-FM radio amplifiers

2. Portable tape player amplifiers

3. Intercoms

4. TV sound systems

5. Line drivers

6. Ultrasonic drivers

7. Small servo drivers

8. Power converters

Useful External Link

1.  LM386 – Wikipedia


LM386 PDF Datasheet


1N4007S Diode Datasheet ( 1000V, 1A )

1N4007S Diode learn more.

Part number : 1N4007S

Functions : This is a kind of diode. 1000V, 1A, General Purpose Rectifier.

Package information : Axial Lead Type  ( DO-35 )

Manufacturer : CDIL, Diotec, Taiwan Semiconductor

Image :

1N4007S Diode



1N4007S is one of a series of commonly used rectifier diodes. This is well known as the 1N400x series. Here “1N” is the standard prefix denoting the diode, and “4007S” refers to the specific model. These diodes are mainly used for rectification. Diodes are designed to allow current to flow in only one direction, and block current flow at reverse voltage.

1. Maximum reverse voltage (V_RRM): The maximum reverse voltage of 1N4007S diode is 1000V. Therefore, these diodes can be used even at relatively high reverse voltages.

2. Average current: 1N4007S rectifier is capable of handling an average current of 1.0A in certain environments.



1. High efficiency, low VF

2. High current capability

3. High reliability

4. High surge current capability

5. Low power loss


Absolute maximum ratings

1N4007S vs 1N4001S

1. Reverse voltage : VR = 1000 Volts

2. Peak reverse voltage : VRM = 1000 Volts

3. Average rectified current : Io = 1A



1N4007 Vs 1N4007S

The 1N4007/1N4007S series diodes are manufactured to give high current / low forward voltage drop capability. 1N4007 has a lead diameter of 0.7 ± 0.05mm and 1N4007S has a lead diameter of 0.6 ± 0.05mm. Some people indicate that it is an SMD type with an S at the end, but this is not the case. Axial type is correct.


1N4007S Diode Datasheet


Related Diodes