LM4880N

Product Overview

• Category: Integrated Circuit (IC)
• Use: Audio Power Amplifier
• Characteristics: High-performance, low distortion, stereo audio amplifier
• Package: DIP (Dual In-line Package)
• Essence: Provides amplification and power to audio signals
• Packaging/Quantity: Available in tubes of 25 or reels of 1000 units

Specifications

• Power Supply Voltage: ±2.5V to ±18V
• Output Power: 1.1W per channel (at 10% THD+N, 8Ω load, VCC = ±9V)
• Total Harmonic Distortion + Noise (THD+N): 0.2% (typical, at 1kHz, 1W output power)
• Input Sensitivity: 150mV (typical, at 1kHz, 1W output power)
• Shutdown Current: 0.6μA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4880N has a 14-pin dual in-line package (DIP) with the following pin configuration:

```

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| | --|1 14 |-- VCC+ --|2 13 |-- OUTL --|3 12 |-- GND --|4 11 |-- INL --|5 10 |-- BYPASS --|6 9 |-- SHUTDOWN --|7 8 |-- OUTR |___________| ```

Functional Features

• Stereo audio amplification with low distortion
• Wide operating voltage range for flexibility in power supply selection
• Shutdown mode for power-saving when not in use
• Bypass pin for direct signal routing
• Thermal shutdown protection to prevent overheating

Advantages and Disadvantages

Advantages: - High-performance audio amplification - Low distortion for accurate sound reproduction - Flexible power supply options - Power-saving shutdown mode - Protection against thermal damage

Disadvantages: - Limited output power compared to higher wattage amplifiers - Requires external components for a complete audio system

Working Principles

The LM4880N is an audio power amplifier that takes low-level audio signals as input and amplifies them to drive speakers or headphones. It operates by receiving the audio signal through the INL (left channel input) and INR (right channel input) pins. The amplified audio signals are then sent to the OUTL (left channel output) and OUTR (right channel output) pins, respectively.

The LM4880N can be powered using a dual power supply ranging from ±2.5V to ±18V. It features a shutdown pin (SHUTDOWN) that allows the amplifier to enter a low-power mode when not in use, reducing energy consumption.

Additionally, the BYPASS pin enables direct signal routing without amplification, useful for applications where the audio signal needs to bypass the amplifier stage.

Detailed Application Field Plans

The LM4880N finds application in various audio systems, including:

1. Portable audio devices: Provides amplification for headphones or small speakers in portable music players, smartphones, and tablets.
2. Home audio systems: Used in stereo receivers, amplifiers, and multimedia speakers to enhance audio quality.
3. Automotive audio systems: Amplifies audio signals for car stereos and entertainment systems.
4. Computer peripherals: Integrated into computer speakers, soundbars, and gaming headsets for improved audio performance.

Alternative Models

Other alternative models with similar functionality to the LM4880N include:

1. LM4881: Higher output power (2W per channel) and improved THD+N performance.
2. LM4863: Lower power consumption and smaller package size, suitable for portable applications.
3. TDA7265: Dual bridge amplifier with higher output power (25W per channel) for larger audio systems.

These alternative models can be considered based on specific requirements and application needs.

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