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LM4809MMX/NOPB
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LM4809MMX/NOPB

Product Overview

Category: Audio Amplifier
Use: The LM4809MMX/NOPB is a mono, bridge-tied load (BTL) audio power amplifier designed for use in portable electronic devices.
Characteristics: It features low quiescent current, low distortion, and a shutdown mode to conserve power.
Package: Miniature 8-pin WSON package
Essence: The LM4809MMX/NOPB is essential for driving small speakers with high efficiency and low distortion.
Packaging/Quantity: Available in reels of 2500 units.

Specifications

  • Output Power: 1.1W at 5V, 10% THD+N, 8Ω Load
  • Quiescent Current: 1.6mA
  • Shutdown Current: 0.01μA
  • Supply Voltage Range: 2.4V to 5.5V
  • Total Harmonic Distortion + Noise (THD+N): 0.2% at 1kHz, 1.1W into 8Ω
  • Shutdown Mode:
    • Reduces supply current to less than 0.01μA
    • Allows the amplifier to be switched on and off without creating transients in the speaker

Detailed Pin Configuration

The LM4809MMX/NOPB has the following pin configuration: 1. IN-: Non-inverting input 2. IN+: Inverting input 3. SHUTDOWN: Shutdown control input 4. GND: Ground 5. VDD: Positive power supply 6. OUT+: Speaker output 7. OUT-: Speaker output 8. BP: Bypass capacitor connection

Functional Features

  • Low Quiescent Current: Enables longer battery life in portable devices
  • Shutdown Mode: Allows for power conservation when the amplifier is not in use
  • Low Distortion: Ensures high-quality audio output
  • Wide Supply Voltage Range: Provides flexibility in power supply selection

Advantages and Disadvantages

Advantages: - Low power consumption - Compact package size - High efficiency

Disadvantages: - Limited output power compared to larger amplifiers - Requires an external bypass capacitor for optimal performance

Working Principles

The LM4809MMX/NOPB operates as a BTL amplifier, which allows it to drive small speakers with high efficiency. It uses a low quiescent current design to minimize power consumption and can be shut down when not in use to further conserve energy.

Detailed Application Field Plans

The LM4809MMX/NOPB is suitable for various portable electronic devices, including: - Mobile phones - Portable media players - Bluetooth speakers - Handheld gaming devices

Detailed and Complete Alternative Models

Some alternative models to the LM4809MMX/NOPB include: - TPA2005D1 - MAX98306 - PAM8403

In conclusion, the LM4809MMX/NOPB is a versatile audio amplifier suitable for portable electronic devices, offering low power consumption, high efficiency, and compact packaging.

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Lista 10 Vanliga frågor och svar relaterade till tillämpningen av LM4809MMX/NOPB i tekniska lösningar

  1. What is the typical application of LM4809MMX/NOPB?

    • The LM4809MMX/NOPB is commonly used as a headphone amplifier in portable devices such as smartphones, tablets, and MP3 players.

  2. What is the maximum power output of LM4809MMX/NOPB?

    • The LM4809MMX/NOPB can deliver up to 105mW per channel into a 16Ω load.

  3. What is the supply voltage range for LM4809MMX/NOPB?

    • The supply voltage range for LM4809MMX/NOPB is typically between 2.7V and 5.5V.

  4. Does LM4809MMX/NOPB require external coupling capacitors?

    • No, LM4809MMX/NOPB does not require external coupling capacitors, which simplifies the design and reduces component count.

  5. What is the input impedance of LM4809MMX/NOPB?

    • The input impedance of LM4809MMX/NOPB is typically 40kΩ.

  6. Can LM4809MMX/NOPB be used in stereo applications?

    • Yes, LM4809MMX/NOPB can be used in stereo applications as it is a dual-channel amplifier.

  7. What is the total harmonic distortion (THD) of LM4809MMX/NOPB?

    • The THD of LM4809MMX/NOPB is typically 0.1% at 1kHz and 10mW output power.

  8. Is LM4809MMX/NOPB suitable for battery-powered devices?

    • Yes, LM4809MMX/NOPB is suitable for battery-powered devices due to its low quiescent current and wide supply voltage range.

  9. Does LM4809MMX/NOPB have thermal shutdown protection?

    • Yes, LM4809MMX/NOPB has built-in thermal shutdown protection to prevent overheating.

  10. What is the package type of LM4809MMX/NOPB?

    • LM4809MMX/NOPB is available in a small MSOP-8 package, making it suitable for space-constrained designs.