LM4878ITP/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Power Amplifier

Characteristics: - High efficiency - Low quiescent current - Wide supply voltage range - Thermal shutdown protection - Short-circuit and thermal overload protection

Package: TSSOP-20

Essence: The LM4878ITP/NOPB is a high-performance audio power amplifier IC designed for portable devices such as smartphones, tablets, and portable media players.

Packaging/Quantity: The LM4878ITP/NOPB is available in tape and reel packaging with 2500 units per reel.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Output Power: 3W (4Ω, 10% THD+N)
• Efficiency: 90%
• Quiescent Current: 1.6mA
• Shutdown Current: <1µA
• Total Harmonic Distortion + Noise (THD+N): 0.1%
• Signal-to-Noise Ratio (SNR): 95dB
• Operating Temperature Range: -40°C to 85°C

Pin Configuration

The LM4878ITP/NOPB has a total of 20 pins arranged as follows:

Pin 1: Shutdown Pin 2: Input Left Channel Pin 3: Input Right Channel Pin 4: Bypass Capacitor Pin 5: Gain Select Pin 6: Mute Pin 7: Output Pin 8: GND Pin 9: GND Pin 10: GND Pin 11: GND Pin 12: GND Pin 13: GND Pin 14: GND Pin 15: GND Pin 16: VDD Pin 17: VDD Pin 18: VDD Pin 19: VDD Pin 20: VDD

Functional Features

• High efficiency audio power amplifier
• Low quiescent current for extended battery life
• Wide supply voltage range allows compatibility with various power sources
• Thermal shutdown protection prevents damage due to excessive heat
• Short-circuit and thermal overload protection ensures safe operation

Advantages and Disadvantages

Advantages: - High efficiency results in longer battery life - Wide supply voltage range allows flexibility in power source selection - Thermal shutdown and short-circuit protection enhance reliability and safety - Compact TSSOP-20 package enables space-saving designs

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

Working Principles

The LM4878ITP/NOPB is a class AB audio power amplifier that amplifies the input audio signals from portable devices. It utilizes a bridge-tied load (BTL) configuration to deliver high-quality audio output to speakers or headphones. The amplifier operates by modulating the input signal using a pair of complementary transistors, resulting in amplified audio signals at the output.

Detailed Application Field Plans

The LM4878ITP/NOPB is widely used in various portable electronic devices where audio amplification is required. Some common application fields include: - Smartphones - Tablets - Portable media players - Bluetooth speakers - Gaming consoles - Personal digital assistants (PDAs)

Detailed and Complete Alternative Models

1. LM4863LQ/NOPB - 2.2W Audio Power Amplifier, Class AB, DIP-8 package
2. LM386N-1/NOPB - 1W Audio Power Amplifier, Class AB, DIP-8 package
3. TPA3116D2PWPR - 50W Stereo Class D Audio Power Amplifier, HTSSOP-28 package
4. MAX9744ETJ+T - 20W Stereo Class D Audio Power Amplifier, TQFN-32 package
5. TAS5630BPHDR - 300W Stereo Class D Audio Power Amplifier, HTSSOP-44 package

These alternative models offer different power outputs, package types, and features to suit various audio amplification requirements.

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