Description
The LM386 is a compact low-voltage audio power amplifier IC designed for easy integration into a variety of consumer electronics and hobbyist projects. Operating on voltages as low as 4V and up to 18V, it is optimized for battery-powered applications such as portable radios, intercoms, DIY audio systems, and more.
With a built-in gain of 20 (adjustable up to 200 using external components), the LM386 simplifies audio amplification by reducing external part count. It provides ground-referenced inputs, low distortion (0.2%), and a self-centering output bias, making it a plug-and-play choice for beginner and advanced audio circuit designers alike.
Thanks to its ultra-low power consumption (only 4 mA quiescent current), this IC is ideal for power-efficient designs such as handheld devices and embedded audio playback systems.
✅ Key Features
Perfect for battery-powered audio applications
Wide operating voltage: 4V to 12V (LM386N-1 to N-3) or up to 18V (LM386N-4)
️ Adjustable gain: Default gain of 20, extendable up to 200 with external capacitor and resistor
Low distortion: 0.2% at typical operating conditions
Self-biasing output: Simplifies single-supply use
Minimal external components required
Compact 8-pin DIP or MSOP package (varies)
⚡ Low quiescent current drain: Only 4 mA typical
Technical Specifications
| Parameter | Value |
|---|---|
| Supply Voltage (LM386N-1/3) | 15 V max |
| Supply Voltage (LM386N-4) | 22 V max |
| Operating Voltage Range | 4V – 12V (typical), up to 18V |
| Input Voltage | ±0.4 V |
| Quiescent Current | 4 mA (typical) |
| Output Power (6V, 8Ω load) | ~325 mW |
| Gain Range | 20 (default) to 200 (max) |
| Total Harmonic Distortion | 0.2% |
| Operating Temp Range | 0°C to +70°C |
| Storage Temp Range | –65°C to +150°C |
| Package Options | 8-pin DIP, MSOP, SOIC |
Applications
AM/FM radio audio amplifiers
DIY mini speaker systems
️ Intercom systems
Portable cassette/tape player audio output
TV audio signal amplifiers
Line drivers for audio output
Ultrasonic sound drivers
Small robotic servo motor drivers
DC-DC converter and signal boosting circuits
Package Includes
1 × LM386 Audio Amplifier IC (variant depends on stock: LM386N-1, LM386N-3, LM386N-4, etc.)
FAQ
Q1: Can I use this IC to build a mini Bluetooth speaker?
✅ Yes! It’s an excellent choice for battery-powered Bluetooth speaker circuits.
Q2: How can I increase the gain above 20?
Connect a capacitor (typically 10 µF) and resistor between pins 1 and 8 to increase gain up to 200.
Q3: Is the LM386 suitable for Arduino or Raspberry Pi audio projects?
Yes. It’s widely used in Arduino audio output projects and works well with 5V supply systems.
Q4: Which speaker impedance works best?
Use 8Ω speakers for optimal performance at standard voltages (6V).
Meta Title
LM386 Audio Op-Amp IC – Low Voltage Power Amplifier | Robotech Shop BD
Meta Description
Buy LM386 audio op-amp IC for low voltage audio amplification. Ideal for portable speakers, Arduino audio projects, and AM/FM radios. Adjustable gain 20–200.
