LM4911MM/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Amplifier

Characteristics: - Single supply voltage range: 2.7V to 5.5V - Output power: 105mW at 3.3V, 1% THD+N into 8Ω - Shutdown current: 0.01µA (typical) - Low quiescent current: 4mA (typical) - Package: 10-Lead VSSOP - Essence: Mono Class AB Boomer® audio power amplifier

Packaging/Quantity: The LM4911MM/NOPB is available in a 10-Lead VSSOP package. It is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Quiescent Current: 4mA (typical)
• Shutdown Current: 0.01µA (typical)
• Output Power: 105mW at 3.3V, 1% THD+N into 8Ω
• Total Harmonic Distortion + Noise (THD+N): 0.1% (typical)
• Signal-to-Noise Ratio (SNR): 90dB (typical)
• Gain Bandwidth Product: 1.2MHz (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4911MM/NOPB has the following pin configuration:

```

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| | --| VDD | --| INP | --| INN | --| SHUTDOWN | --| GAIN | --| BYPASS | --| OUT | --| GND | |___________| ```

Functional Features

1. Single Supply Operation: The LM4911MM/NOPB operates on a single supply voltage range of 2.7V to 5.5V, making it suitable for portable audio devices.

2. Low Quiescent Current: With a low quiescent current of 4mA (typical), the LM4911MM/NOPB helps conserve power in battery-powered applications.

3. Shutdown Mode: The SHUTDOWN pin allows the amplifier to enter a low-power shutdown mode, reducing power consumption to as low as 0.01µA (typical).

4. Bypass Mode: The BYPASS pin enables direct connection of an external audio signal, bypassing the internal gain stage and allowing for flexible audio routing.

5. High Output Power: The LM4911MM/NOPB can deliver an output power of 105mW at 3.3V with 1% THD+N into an 8Ω load, providing ample volume for various audio applications.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with different power sources. - Low quiescent current helps extend battery life in portable devices. - Shutdown mode minimizes power consumption during idle periods. - Bypass mode offers flexibility in audio signal routing. - High output power ensures sufficient volume for audio playback.

Disadvantages: - Limited to mono audio amplification. - May require additional components for stereo or multi-channel applications.

Working Principles

The LM4911MM/NOPB is a mono Class AB Boomer® audio power amplifier. It amplifies audio signals from the input pins (INP and INN) and delivers the amplified signal through the OUT pin to an external speaker or headphone. The gain of the amplifier can be controlled using the GAIN pin. The SHUTDOWN pin allows the amplifier to enter a low-power shutdown mode when not in use.

Detailed Application Field Plans

The LM4911MM/NOPB is commonly used in various portable audio applications, including: - Mobile phones - MP3 players - Portable gaming devices - Personal digital assistants (PDAs) - Portable media players

Alternative Models

Some alternative models that offer similar functionality to the LM4911MM/NOPB include: - LM4861: Stereo Class AB audio power amplifier - LM386: Low voltage audio power amplifier - TPA3116D2: Class D audio amplifier with integrated DSP

These alternative models can be considered based on specific application requirements and design constraints.

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