LM386MX-1/NOPB

Product Overview

Category

The LM386MX-1/NOPB belongs to the category of integrated circuits (ICs) specifically designed for audio amplification.

Use

This product is commonly used in audio applications where low voltage and low power consumption are required, such as portable devices, small speakers, and headphones.

Characteristics

• Low voltage operation: The LM386MX-1/NOPB operates at a low voltage range of 4V to 12V, making it suitable for battery-powered applications.
• Low power consumption: It consumes minimal power while providing efficient audio amplification.
• Small package size: The LM386MX-1/NOPB comes in a compact package, allowing for space-saving designs.
• High gain: It offers a high voltage gain of up to 200, enabling amplification of weak audio signals.
• Adjustable gain control: The LM386MX-1/NOPB provides the flexibility to adjust the amplification level according to specific requirements.

Package and Quantity

The LM386MX-1/NOPB is available in an SOIC-8 package. It is typically sold in reels or tubes containing multiple units, with quantities varying based on the supplier and customer needs.

Specifications

• Supply Voltage Range: 4V to 12V
• Quiescent Current Drain: 4mA
• Voltage Gain: 20 to 200 (adjustable)
• Output Power: 325mW
• Total Harmonic Distortion: 0.2% (at 400mW output)
• Input Impedance: 50kΩ
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM386MX-1/NOPB has eight pins arranged in a standard SOIC-8 package:

┌───┬───┬───┬───┐ │ 1 │ 2 │ 3 │ 4 │ ├───┼───┼───┼───┤ │ 8 │ 7 │ 6 │ 5 │ └───┴───┴───┴───┘

1. Gain Control (GAIN)
2. Input (IN+)
3. Input (IN-)
4. Bypass Capacitor (BP)
5. Output (OUT)
6. Ground (GND)
7. Supply Voltage (VCC)
8. Gain Control (GAIN)

Functional Features

• Low voltage operation: The LM386MX-1/NOPB can operate at low voltages, making it suitable for battery-powered devices.
• Adjustable gain control: It allows users to adjust the amplification level according to their specific requirements.
• Internal gain setting resistors: The IC incorporates internal resistors that simplify the external circuitry and reduce component count.
• Minimal external components: The LM386MX-1/NOPB requires only a few external components, simplifying the overall design.
• Thermal shutdown protection: It includes built-in thermal shutdown protection to prevent overheating and ensure safe operation.

Advantages and Disadvantages

Advantages

• Low voltage operation enables use in battery-powered applications.
• Adjustable gain control provides flexibility in audio amplification.
• Compact package size allows for space-saving designs.
• Internal gain setting resistors simplify circuitry and reduce component count.
• Minimal external components required, simplifying overall design.

Disadvantages

• Limited output power compared to higher-power audio amplifiers.
• Higher total harmonic distortion compared to some high-end audio amplifiers.
• Not suitable for high-power audio applications.

Working Principles

The LM386MX-1/NOPB is a class AB audio amplifier IC that operates on low voltage. It utilizes internal gain setting resistors to simplify the external circuitry and reduce component count. The gain control pins (GAIN) allow users to adjust the amplification level according to their requirements.

When an audio signal is applied to the input pins (IN+ and IN-), the LM386MX-1/NOPB amplifies it and provides an amplified output signal at the OUT pin. The gain can be adjusted by varying the resistance connected to the GAIN pins.

The IC incorporates thermal shutdown protection, which prevents overheating and ensures safe operation even under demanding conditions.

Detailed Application Field Plans

The LM386MX-1/NOPB finds extensive application in various audio-related fields, including:

1. Portable devices: It is commonly used in portable audio players, smartphones, tablets, and other battery-powered devices where low voltage operation and compact size are crucial.
2. Small speakers: The LM386MX-1/NOPB is suitable for driving small speakers used in multimedia systems, computer speakers, and portable