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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