LM4879SDX/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Power Amplifier

Characteristics: - Small size and low power consumption - High efficiency and low distortion - Wide supply voltage range - Thermal shutdown protection - Short-circuit protection

Package: SDIP (Shrink Dual Inline Package)

Essence: The LM4879SDX/NOPB is a mono audio power 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 LM4879SDX/NOPB is available in tape and reel packaging, with 2500 units per reel.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Output Power: 1.1W (4Ω, 5V)
• Total Harmonic Distortion + Noise (THD+N): 0.1% (1kHz, 1.1W)
• Efficiency: 85%
• Shutdown Current: 0.01μA (typical)
• Operating Temperature Range: -40°C to 85°C

Pin Configuration

The LM4879SDX/NOPB has a total of 8 pins:

1. VDD: Positive power supply
2. IN+: Non-inverting input
3. IN-: Inverting input
4. GND: Ground
5. SHUTDOWN: Shutdown control input
6. BYPASS: Bypass capacitor connection
7. OUT: Amplifier output
8. VSS: Negative power supply

Functional Features

• Low quiescent current
• Pop and click suppression circuitry
• External gain configuration option
• Thermal shutdown protection
• Short-circuit protection

Advantages and Disadvantages

Advantages: - Small size allows for compact device designs - Low power consumption prolongs battery life - High efficiency ensures optimal use of power - Thermal shutdown and short-circuit protection enhance reliability

Disadvantages: - Limited output power compared to larger amplifiers - Mono output limits stereo sound reproduction

Working Principles

The LM4879SDX/NOPB is a class AB audio power amplifier. It amplifies the audio signal received at the input and delivers it to the connected speaker or headphone. The amplifier operates by modulating the supply voltage based on the input signal, resulting in amplified audio output.

Detailed Application Field Plans

The LM4879SDX/NOPB is commonly used in portable electronic devices where space and power consumption are critical factors. Some application fields include:

1. Mobile phones
2. Tablets
3. Portable media players
4. Bluetooth speakers
5. Wearable devices

Detailed and Complete Alternative Models

1. LM4863: Dual audio power amplifier with higher output power
2. LM386: Low voltage audio power amplifier with adjustable gain
3. TPA3116D2: Digital audio power amplifier with advanced features

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

In conclusion, the LM4879SDX/NOPB is a small-sized, low-power audio power amplifier IC designed for portable devices. It offers high-quality audio amplification with thermal and short-circuit protection. While it has limitations in terms of output power and mono output, it is widely used in mobile phones, tablets, and portable media players. Alternative models such as the LM4863, LM386, and TPA3116D2 provide additional options for audio amplification needs.