LM4924SDX

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Amplifier

Characteristics: - Single supply voltage: 2.7V to 5.5V - Output power: 1.2W (typical) - Low quiescent current: 3mA (typical) - Shutdown mode for power saving - Thermal shutdown protection - Small package size: SDIP-12

Package: SDIP-12

Essence: The LM4924SDX is a single supply audio amplifier IC designed for portable devices such as mobile phones, tablets, and portable media players. It provides high-quality audio amplification with low power consumption.

Packaging/Quantity: The LM4924SDX is available in a small outline package (SDIP-12) and is typically sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Quiescent Current: 3mA (typical)
• Output Power: 1.2W (typical)
• Shutdown Current: 0.01μA (typical)
• Total Harmonic Distortion + Noise (THD+N): 0.1% (typical)
• Signal-to-Noise Ratio (SNR): 90dB (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The LM4924SDX has a total of 12 pins arranged as follows:

```

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| | | 1 6 11| --| VDD INL SHDN|-- --| GND INR OUTL|-- --| BIAS OUTR VSS|-- |_______________| ```

1. VDD: Positive supply voltage
2. INL: Left channel audio input
3. SHDN: Shutdown control input
4. GND: Ground
5. INR: Right channel audio input
6. OUTL: Left channel audio output
7. BIAS: Bias voltage output
8. OUTR: Right channel audio output
9. VSS: Negative supply voltage

Functional Features

• Single-ended stereo audio amplification
• Low quiescent current for power efficiency
• Shutdown mode for power saving when not in use
• Thermal shutdown protection to prevent overheating
• Small package size for space-constrained applications

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with various devices - Low quiescent current prolongs battery life - Shutdown mode reduces power consumption during idle periods - Thermal shutdown protection ensures safe operation - Small package size enables compact designs

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

Working Principles

The LM4924SDX is a class AB audio amplifier that operates on a single supply voltage. It amplifies the audio signals received from the left and right channels, providing an amplified output to drive speakers or headphones. The amplifier can be controlled using the shutdown pin, allowing for power-saving operation when not in use. It also incorporates thermal shutdown protection to prevent damage due to excessive heat.

Detailed Application Field Plans

The LM4924SDX is commonly used in portable electronic devices where audio amplification is required. Some potential application fields include: - Mobile phones - Tablets - Portable media players - Bluetooth speakers - Gaming consoles - Personal digital assistants (PDAs)

Detailed and Complete Alternative Models

• LM4863: Dual 2.2W Audio Amplifier
• LM386: Low Voltage Audio Power Amplifier
• TPA3116D2: 50W Stereo Class D Audio Amplifier

These alternative models offer different features and specifications, providing options for various audio amplification requirements.

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