LM4808MX

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LM4808MX

+BOM

AUDIO AMPLIFIER, 0.15W, 2 CHANNE

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Specifications

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Overview

Description

The LM4808MX is an integrated audio power amplifier designed for delivering high-quality stereo sound in compact applications. It is commonly used in devices such as portable audio players, smartphones, and other battery-powered electronics. This IC features a bridged-tied load (BTL) configuration, which enables it to drive speakers directly without the need for output coupling capacitors. This configuration helps in maximizing the output power and delivering better sound quality by ensuring efficient use of the power supply.
The LM4808MX can provide an output power of up to 105mW per channel into a 16-ohm load with low total harmonic distortion, ensuring clear and distortion-free audio. It operates over a wide voltage range, making it adaptable to various power supply conditions. Additionally, it includes features like thermal shutdown protection and pop-and-click suppression circuitry, enhancing its reliability and audio performance. The chip is packaged in a small, surface-mount package, making it suitable for compact circuit designs where space is a premium. Overall, the LM4808MX is valued for its efficiency, sound quality, and integration in space-limited audio applications.

Equivalent

The LM4808MX is a dual audio power amplifier. Equivalent products may include:
1. TPA6112A2 from Texas Instruments
2. NJM4556 from New Japan Radio (NJR)
3. MAX9722 from Maxim Integrated
4. PAM8403 from PAM Semiconductor
5. TEA2025 from STMicroelectronics
These alternatives provide similar functionality and can potentially be used as substitutes, but always check the specific electrical characteristics and pin configurations to ensure compatibility with your application.

Features

The LM4808MX is a dual audio power amplifier designed for delivering quality sound in portable electronic devices. It features a 2.1W stereo output with a 4Ω load and operates on a low voltage range of 2.0V to 5.5V, making it suitable for battery-powered applications. The amplifier offers a low distortion rate and high Signal-to-Noise Ratio (SNR) to ensure clear audio output.
Key features include:
- Output Power: 2.1W per channel with 4Ω load.
- Supply Voltage: Operates between 2.0V to 5.5V.
- High PSRR: Provides improved sound quality by reducing power supply noise.
- Low Total Harmonic Distortion (THD): Ensures minimal audio distortion.
- Shutdown Mode: Conserves power by significantly reducing power consumption when the device is not in use.
- Short Circuit Protection: Protects the device from potential damage due to short circuits.
- Thermal Overload Protection: Automatically shuts down the amplifier in the event of overheating, enhancing durability.
These features make the LM4808MX ideal for use in portable audio devices where space and power efficiency are critical.

Pinout

The LM4808MX is a dual audio power amplifier designed for portable communication device applications. The IC is typically packaged in an 8-pin SOIC (Small Outline Integrated Circuit) package. Here is a brief description of the pin functions:
1. VDD: Power supply input. This pin provides power to the device.
2. GND: Ground connection. It serves as the common ground for the device.
3. IN1: Input for the first channel. It receives the audio signal for the first amplifier.
4. IN2: Input for the second channel. It receives the audio signal for the second amplifier.
5. OUT1: Output for the first channel. It delivers the amplified audio signal from the first channel.
6. OUT2: Output for the second channel. It delivers the amplified audio signal from the second channel.
7. BYPASS: Bypass pin. It is used for bypassing the amplifier and helps in minimizing the turn-on pop sound.
8. SHUTDOWN: Shutdown pin. It is used to put the device into a low-power shutdown mode to save power when the amplifier is not in use.
These pins allow the LM4808MX to efficiently amplify audio signals in various applications.

Manufacturer

The LM4808MX is manufactured by Texas Instruments, a multinational technology company based in the United States. Texas Instruments specializes in designing and manufacturing semiconductors and various integrated circuits, which are used in a wide range of electronic devices and systems. The company is one of the largest semiconductor manufacturers globally and serves various industries, including automotive, industrial, personal electronics, communications equipment, and enterprise systems.

Application

The LM4808MX is a dual audio power amplifier primarily used in applications requiring low voltage audio amplification. Key application areas include:
1. Portable Audio Devices: Used in MP3 players, portable media players, and personal audio systems for driving headphones or small speakers.
2. Consumer Electronics: Integrated into televisions, radios, and other home audio systems for improved sound quality.
3. Computer Audio: Enhances audio performance in laptops and desktop computers.
4. Mobile Phones: Amplifies audio for better sound output in mobile devices.
5. Automotive Audio: Utilized in car audio systems for enhanced in-cabin sound.
Its low power consumption and compact size make it suitable for battery-operated devices.

Package

The LM4808MX is typically housed in an SOIC (Small Outline Integrated Circuit) package. More specifically, for the LM4808MX, it is commonly found in an 8-pin SOIC package. This type of package is suitable for surface mounting on printed circuit boards.