LM4900M/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Amplifier

Characteristics: - Single supply voltage operation - Low quiescent current - High output power capability - Thermal shutdown protection - Small package size

Package: SOIC (Small Outline Integrated Circuit)

Essence: The LM4900M/NOPB is a high-performance audio amplifier IC designed for use in portable devices such as smartphones, tablets, and portable media players. It provides high-quality audio amplification with low power consumption.

Packaging/Quantity: The LM4900M/NOPB is available in a standard SOIC package. It is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Quiescent Current: 1.6mA (typical)
• Output Power: 1.1W (typical) into 8Ω load at 5V supply
• Total Harmonic Distortion + Noise (THD+N): 0.1% (typical) at 1kHz, 1W into 8Ω load
• Shutdown Current: 0.01μA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4900M/NOPB has a total of 8 pins arranged in a specific configuration:

```

---

| | --| VDD GND|-- Pin 1: Ground (GND) --| IN- SHDN|-- Pin 2: Shutdown Control Input --| IN+ OUT|-- Pin 3: Audio Input --| BYP VDD|-- Pin 4: Bypass Capacitor Connection --| VOUT VOUT|-- Pin 5: Audio Output --| GND IN+|-- Pin 6: Audio Input --| SHDN IN-|-- Pin 7: Shutdown Control Input |___________| ```

Functional Features

1. Single Supply Voltage Operation: The LM4900M/NOPB can operate from a single supply voltage, making it suitable for portable devices with limited power supply options.

2. Low Quiescent Current: The IC has a low quiescent current, which helps in conserving battery life in portable applications.

3. High Output Power Capability: Despite its small size, the LM4900M/NOPB can deliver high output power, enabling it to drive speakers efficiently.

4. Thermal Shutdown Protection: The IC incorporates thermal shutdown protection, which prevents damage due to excessive heat.

Advantages and Disadvantages

Advantages: - Single supply voltage operation simplifies circuit design. - Low quiescent current extends battery life. - High output power capability enables driving of speakers without additional amplification stages. - Thermal shutdown protection ensures device safety.

Disadvantages: - Limited output power compared to larger audio amplifiers. - May require additional external components for optimal performance.

Working Principles

The LM4900M/NOPB is a class AB audio amplifier that amplifies the input audio signal and drives the connected speaker. It operates by modulating the input signal using a pair of complementary transistors to achieve efficient amplification. The IC also includes various protection features to ensure safe operation.

Detailed Application Field Plans

The LM4900M/NOPB is widely used in portable electronic devices where audio amplification is required. Some common application fields include: - Smartphones - Tablets - Portable media players - Bluetooth speakers - Gaming consoles

Detailed and Complete Alternative Models

1. LM4863: Similar audio amplifier IC with higher output power capability.
2. TPA3116D2: Class D audio amplifier IC with higher efficiency and lower power consumption.
3. MAX9744: Integrated stereo audio amplifier IC with built-in volume control.

These alternative models offer different features and specifications, allowing designers to choose the most suitable option for their specific application requirements.

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