LM4890ITLX/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Audio amplifier

Characteristics: - Single supply voltage: 2.7V to 5.5V - Output power: 1.1W at 5V, 10% THD+N - Low quiescent current: 4mA - Shutdown current: 0.01μA - Package: Thin SOT-23-6 - Essence: Mono bridge-tied load (BTL) audio amplifier

Packaging/Quantity: The LM4890ITLX/NOPB is available in a thin SOT-23-6 package. It is typically sold in reels of 3000 units.

Specifications

The LM4890ITLX/NOPB has the following specifications:

• Supply Voltage Range: 2.7V to 5.5V
• Quiescent Current: 4mA
• Shutdown Current: 0.01μA
• Output Power: 1.1W at 5V, 10% THD+N
• Total Harmonic Distortion + Noise (THD+N): 0.1%
• Signal-to-Noise Ratio (SNR): 90dB
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4890ITLX/NOPB has a total of six pins arranged as follows:

____ IN+ | | OUT+ IN- | | GND SHDN | | VDD NC |____| OUT-

• IN+: Non-inverting input
• IN-: Inverting input
• OUT+: Positive output
• GND: Ground
• SHDN: Shutdown pin (active low)
• VDD: Supply voltage
• OUT-: Negative output
• NC: No connection

Functional Features

The LM4890ITLX/NOPB offers the following functional features:

1. Mono Bridge-Tied Load (BTL) Amplifier: The amplifier is designed to drive a single speaker in a bridge-tied load configuration, providing increased power output.

2. Low Quiescent Current: The IC has a low quiescent current of 4mA, making it suitable for battery-powered applications.

3. Shutdown Mode: The SHDN pin allows the amplifier to be put into a low-power shutdown mode, reducing the current consumption to 0.01μA.

4. Wide Supply Voltage Range: The LM4890ITLX/NOPB operates from a supply voltage range of 2.7V to 5.5V, making it compatible with various power sources.

Advantages and Disadvantages

Advantages: - Mono BTL configuration provides increased power output. - Low quiescent current enables battery-powered applications. - Shutdown mode reduces power consumption when not in use. - Wide supply voltage range enhances compatibility.

Disadvantages: - Limited output power compared to higher wattage amplifiers. - Single-channel output may not be suitable for stereo applications.

Working Principles

The LM4890ITLX/NOPB is an audio amplifier that utilizes a mono bridge-tied load (BTL) configuration. In this configuration, the positive output terminal is connected to one side of the speaker, while the negative output terminal is connected to the other side. This arrangement effectively doubles the available voltage swing across the speaker, resulting in increased power output.

The amplifier accepts audio input signals through the non-inverting (IN+) and inverting (IN-) inputs. It amplifies the input signal and drives the speaker connected to the output terminals (OUT+ and OUT-). The gain of the amplifier can be adjusted by external components.

The SHDN pin allows the amplifier to enter a low-power shutdown mode when pulled low. In this mode, the amplifier consumes minimal current, conserving power when not in use.

Detailed Application Field Plans

The LM4890ITLX/NOPB is suitable for various audio amplification applications, including but not limited to:

1. Portable Audio Devices: The low quiescent current and wide supply voltage range make it ideal for battery-powered portable audio devices such as MP3 players, smartphones, and portable speakers.

2. Automotive Audio Systems: The amplifier can be used in automotive audio systems to drive speakers and provide enhanced audio quality.

3. Home Entertainment Systems: It can be integrated into home theater systems, soundbars, and multimedia speakers to amplify audio signals.

4. Industrial Applications: The LM4890ITLX/NOPB can be utilized in industrial equipment that requires audio amplification, such as intercom systems, public address systems, and alarm systems.

Detailed and Complete Alternative Models

Some alternative models to the LM4890ITL