LM4923LQ/NOPB

Product Overview

• Category: Audio Amplifier
• Use: Amplifying audio signals for various applications
• Characteristics: High-quality sound reproduction, low power consumption, compact size
• Package: QFN (Quad Flat No-Lead)
• Essence: Integrated audio amplifier with advanced features
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Power Supply Voltage: 2.7V to 5.5V
• Output Power: Up to 1.2W per channel
• Total Harmonic Distortion + Noise: 0.1% (typical)
• Shutdown Current: 0.01μA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4923LQ/NOPB has a total of 20 pins arranged as follows:

Pin 1: VDD Pin 2: SD Pin 3: GND Pin 4: INR Pin 5: INL Pin 6: SHUTDOWN Pin 7: BYPASS Pin 8: VOUTR Pin 9: VOUTL Pin 10: AGND Pin 11: AVDD Pin 12: BST Pin 13: PVDD Pin 14: PGND Pin 15: OUTR Pin 16: OUTL Pin 17: FB Pin 18: NC Pin 19: NC Pin 20: NC

Functional Features

• High-quality audio amplification for portable devices
• Low power consumption extends battery life
• Integrated shutdown mode for power-saving when not in use
• Bypass mode for direct audio signal routing
• Thermal and short-circuit protection for enhanced reliability

Advantages and Disadvantages

Advantages: - High-quality sound reproduction - Low power consumption - Compact size for easy integration - Shutdown mode for power-saving - Thermal and short-circuit protection

Disadvantages: - Limited output power compared to larger amplifiers - May require additional components for specific applications

Working Principles

The LM4923LQ/NOPB is a class AB audio amplifier that operates by amplifying the input audio signals received on the INR (right channel) and INL (left channel) pins. The amplified audio signals are then outputted through the OUTR (right channel) and OUTL (left channel) pins.

The amplifier can be controlled using the SHUTDOWN pin, which allows the device to enter a low-power standby mode when not in use. The BYPASS pin enables direct audio signal routing without amplification.

Detailed Application Field Plans

The LM4923LQ/NOPB is widely used in various portable electronic devices, including:

1. Smartphones and tablets: Enhances audio quality for multimedia playback.
2. Portable media players: Provides high-fidelity sound reproduction.
3. Bluetooth speakers: Amplifies audio signals for wireless playback.
4. Gaming consoles: Improves gaming experience with immersive audio.
5. Wearable devices: Enables clear audio output for notifications and calls.

Alternative Models

1. LM4863LQ/NOPB: Similar audio amplifier with higher output power.
2. LM4950LQ/NOPB: Audio amplifier with integrated volume control.
3. LM4990LQ/NOPB: Class D audio amplifier with improved efficiency.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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