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LM380N
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LM380N

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Power Amplifier

Characteristics: - Single supply voltage range: 10V to 22V - Output power: 2.5W to 7W - Low distortion - High signal-to-noise ratio - Wide bandwidth - Thermal shutdown protection - Short circuit protection

Package: DIP (Dual Inline Package)

Essence: The LM380N is a monolithic audio amplifier IC designed for low-power applications. It provides high-quality audio amplification with low distortion and noise.

Packaging/Quantity: The LM380N is typically sold in tubes or trays, with quantities varying depending on the supplier.

Specifications

  • Supply Voltage Range: 10V to 22V
  • Quiescent Power Drain: 0.6W
  • Output Power: 2.5W to 7W
  • Total Harmonic Distortion: 0.2% (typical)
  • Signal-to-Noise Ratio: 85dB (typical)
  • Bandwidth: 20Hz to 100kHz
  • Input Impedance: 150kΩ
  • Output Impedance: 8Ω

Pin Configuration

The LM380N has an 8-pin DIP package with the following pin configuration:

  1. Non-Inverting Input (+IN)
  2. Inverting Input (-IN)
  3. Ground (GND)
  4. VCC (Supply Voltage)
  5. Output
  6. Bypass Capacitor
  7. Gain Control
  8. N/C (No Connection)

Functional Features

  • Low quiescent power drain
  • Thermal shutdown protection
  • Short circuit protection
  • Internal gain control
  • External gain control capability
  • Wide supply voltage range
  • High output power capability
  • Low distortion and noise

Advantages and Disadvantages

Advantages: - Low power consumption - High-quality audio amplification - Wide supply voltage range - Built-in protection features - Easy to use and integrate into audio systems

Disadvantages: - Limited output power compared to higher wattage amplifiers - Requires external components for optimal performance - Not suitable for high-power audio applications

Working Principles

The LM380N operates as a class AB audio amplifier. It amplifies the input audio signal using internal transistors and delivers the amplified signal to the output. The gain of the amplifier can be controlled internally or externally, allowing flexibility in adjusting the amplification level.

Detailed Application Field Plans

The LM380N is commonly used in various low-power audio applications, including: - Portable radios - Intercom systems - Small audio amplifiers - Television sound systems - Instrument amplifiers - Personal computer audio systems

Alternative Models

Some alternative models that can be considered as replacements for the LM380N are: - TDA2003 - TDA2030 - LM386 - TDA2822

These alternatives offer similar functionality and can be used in similar low-power audio applications.

In conclusion, the LM380N is a versatile audio power amplifier IC with low distortion, high signal-to-noise ratio, and thermal and short circuit protection. Its wide application field and availability of alternative models make it a popular choice for low-power audio amplification needs.

技術ソリューションにおける LM380N の適用に関連する 10 件の一般的な質問と回答をリストします。

Sure! Here are 10 common questions and answers related to the application of LM380N in technical solutions:

  1. Q: What is LM380N? A: LM380N is a power amplifier integrated circuit (IC) commonly used in audio applications.

  2. Q: What is the maximum power output of LM380N? A: The maximum power output of LM380N is typically around 2.5 watts.

  3. Q: Can LM380N be used in battery-powered devices? A: Yes, LM380N can be used in battery-powered devices as it operates at low voltage levels (typically 6-12V).

  4. Q: How many channels does LM380N support? A: LM380N is a single-channel amplifier IC, meaning it supports amplification for one audio channel.

  5. Q: What is the input impedance of LM380N? A: The input impedance of LM380N is typically around 150 kilohms.

  6. Q: Can LM380N drive low-impedance speakers? A: Yes, LM380N can drive low-impedance speakers as it has a built-in output stage capable of driving loads as low as 4 ohms.

  7. Q: Is LM380N suitable for headphone amplification? A: While LM380N can technically be used for headphone amplification, it may not provide optimal performance due to its higher output power capabilities.

  8. Q: Does LM380N require external components for operation? A: Yes, LM380N requires a few external components such as capacitors, resistors, and a power supply to function properly.

  9. Q: Can LM380N be used in audio preamplifier circuits? A: No, LM380N is not designed for preamplification. It is primarily used as a power amplifier to boost the signal level.

  10. Q: What are some common applications of LM380N? A: LM380N is commonly used in applications such as portable radios, intercom systems, small audio amplifiers, and musical instruments.

Please note that these answers are general and may vary depending on specific circuit designs and requirements.