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LM4867MTX/NOPB
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LM4867MTX/NOPB

Product Overview

  • Category: Audio Amplifier
  • Use: Amplifying audio signals for various applications
  • Characteristics: High efficiency, low distortion, compact size
  • Package: MTX (Surface Mount)
  • Essence: Integrated stereo audio amplifier
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Power Supply Voltage: 2.5V to 5.5V
  • Output Power: 1.1W per channel (at 5V, 10% THD+N, 8Ω load)
  • Total Harmonic Distortion + Noise: 0.2% (typical, at 1kHz, 1W output power)
  • Shutdown Current: 0.6μA (typical)
  • Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4867MTX/NOPB package consists of 24 pins. The pin configuration is as follows:

  1. SHUTDOWN
  2. GND
  3. INL-
  4. INL+
  5. BYPASS
  6. VDD
  7. PVDD
  8. OUTL
  9. OUTR
  10. VOUTR
  11. VOUTL
  12. NC
  13. NC
  14. NC
  15. NC
  16. NC
  17. NC
  18. NC
  19. NC
  20. NC
  21. NC
  22. NC
  23. NC
  24. NC

Functional Features

  • Integrated stereo audio amplifier with a wide operating voltage range
  • Low quiescent current in shutdown mode for power-saving applications
  • Thermal shutdown protection to prevent overheating
  • Short-circuit and overcurrent protection for enhanced reliability
  • Internal gain setting resistors for simplified design

Advantages and Disadvantages

Advantages

  • High efficiency, resulting in low power consumption
  • Compact size allows for space-saving designs
  • Low distortion ensures high-quality audio output
  • Wide operating voltage range provides flexibility in various applications

Disadvantages

  • Limited output power compared to higher wattage amplifiers
  • Not suitable for high-power audio systems or large-scale venues

Working Principles

The LM4867MTX/NOPB is a class AB stereo audio amplifier that operates by amplifying the input audio signals. It utilizes internal gain setting resistors to simplify the design process. The amplifier can be powered by a wide range of supply voltages, making it suitable for various portable and battery-powered devices. It incorporates thermal shutdown, short-circuit, and overcurrent protection mechanisms to ensure safe operation and prevent damage.

Detailed Application Field Plans

The LM4867MTX/NOPB is commonly used in the following applications:

  1. Portable audio devices such as smartphones, tablets, and MP3 players
  2. Personal computers and laptops for enhanced audio output
  3. Gaming consoles and handheld gaming devices
  4. Bluetooth speakers and wireless audio systems
  5. Automotive audio systems and head units
  6. Home theater systems and multimedia speakers

Detailed and Complete Alternative Models

  1. TPA3116D2: Class D audio amplifier with higher output power and efficiency
  2. LM386: Low voltage audio power amplifier with simplicity and low cost
  3. MAX9744: Integrated mono audio amplifier with automatic gain control
  4. TDA7498E: Dual BTL class D audio amplifier with high output power capability
  5. STA540: Quad power amplifier for car radio applications

These alternative models offer different features and specifications, catering to specific requirements and preferences of audio system designers.

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10个与LM4867MTX/NOPB在技术解决方案中的应用相关的常见问题及解答

  1. What is the maximum power output of LM4867MTX/NOPB?
    - The maximum power output of LM4867MTX/NOPB is 1.1W per channel into an 8Ω load.

  2. Can LM4867MTX/NOPB operate from a single supply voltage?
    - Yes, LM4867MTX/NOPB can operate from a single supply voltage ranging from 2.7V to 5.5V.

  3. What is the typical quiescent power consumption of LM4867MTX/NOPB?
    - The typical quiescent power consumption of LM4867MTX/NOPB is 4mA at VDD = 5V and no signal.

  4. Does LM4867MTX/NOPB have built-in thermal shutdown protection?
    - Yes, LM4867MTX/NOPB features built-in thermal shutdown protection to prevent overheating.

  5. What is the recommended input signal range for LM4867MTX/NOPB?
    - The recommended input signal range for LM4867MTX/NOPB is 0.1V to 1.0V RMS.

  6. Can LM4867MTX/NOPB be used in portable audio applications?
    - Yes, LM4867MTX/NOPB is suitable for use in portable audio applications due to its low power consumption and small package size.

  7. What is the typical total harmonic distortion (THD) of LM4867MTX/NOPB?
    - The typical THD of LM4867MTX/NOPB is 0.2% at 1kHz and 0.4W into an 8Ω load.

  8. Does LM4867MTX/NOPB require external coupling capacitors?
    - No, LM4867MTX/NOPB does not require external coupling capacitors, which simplifies the design.

  9. Is LM4867MTX/NOPB suitable for driving headphones?
    - Yes, LM4867MTX/NOPB can drive stereo headphones with ease.

  10. What is the operating temperature range of LM4867MTX/NOPB?
    - LM4867MTX/NOPB has an operating temperature range of -40°C to 85°C.