LM4872IBPX

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Power Amplifier

Characteristics: - High efficiency - Low distortion - Small package size - Wide supply voltage range

Package: 8-pin DIP (Dual Inline Package)

Essence: The LM4872IBPX is a high-performance audio power amplifier IC designed for portable electronic devices.

Packaging/Quantity: Available in reels of 2500 units per reel.

Specifications

Supply Voltage Range: 2.7V to 5.5V
Output Power: 1.1W (typical) into 8Ω at 5V
Total Harmonic Distortion + Noise (THD+N): 0.1% (typical) at 1kHz, 1.1W, 8Ω
Efficiency: 85% (typical) at 1kHz, 1.1W, 8Ω
Shutdown Current: 0.01μA (typical)
Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The LM4872IBPX has the following pin configuration:

SHUTDOWN - Shutdown control input
VDD - Positive supply voltage
IN+ - Non-inverting input
IN- - Inverting input
GND - Ground
BYPASS - Bypass capacitor connection
OUT - Speaker output
VSS - Negative supply voltage

Functional Features

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

Advantages and Disadvantages

Advantages: - High efficiency results in longer battery life - Low distortion provides high-quality audio output - Small package size allows for compact device designs - Wide supply voltage range enables compatibility with various power sources

Disadvantages: - Limited output power compared to higher wattage amplifiers - Requires external gain configuration for optimal performance

Working Principles

The LM4872IBPX is a class AB audio power amplifier that amplifies the input audio signal and drives a speaker. It operates by converting the low-voltage audio signal into a higher voltage signal suitable for driving the speaker. The amplifier's internal circuitry ensures low distortion and high efficiency.

Detailed Application Field Plans

The LM4872IBPX is commonly used in portable electronic devices such as: - Mobile phones - Tablets - Portable media players - Bluetooth speakers - Gaming consoles

Detailed and Complete Alternative Models

TPA3116D2 - 50W Stereo Class D Audio Amplifier
MAX98357A - Mono Class D Audio Power Amplifier
TDA7498E - 160W Dual Channel Audio Amplifier
STA540 - 4x13W Quad Bridge Car Radio Amplifier

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

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací LM4872IBPX v technických řešeních

Sure! Here are 10 common questions and answers related to the application of LM4872IBPX in technical solutions:

Q: What is LM4872IBPX? A: LM4872IBPX is a stereo audio amplifier integrated circuit (IC) designed for use in portable devices, such as smartphones, tablets, and portable media players.
Q: What is the power output of LM4872IBPX? A: The LM4872IBPX can deliver up to 3 watts per channel into a 4-ohm load or 1.5 watts per channel into an 8-ohm load.
Q: Can LM4872IBPX operate on a single power supply? A: Yes, LM4872IBPX can operate on a single power supply ranging from 2.7V to 5.5V, making it suitable for battery-powered applications.
Q: Does LM4872IBPX require any external components? A: Yes, LM4872IBPX requires a few external components like capacitors, resistors, and input/output coupling capacitors to function properly.
Q: Can LM4872IBPX drive headphones directly? A: Yes, LM4872IBPX can drive headphones with an impedance range of 16 ohms to 300 ohms without requiring an additional headphone driver circuit.
Q: Is LM4872IBPX capable of driving speakers? A: Yes, LM4872IBPX can drive small speakers with an impedance range of 4 ohms to 8 ohms, making it suitable for compact audio systems.
Q: Does LM4872IBPX have built-in thermal protection? A: Yes, LM4872IBPX has built-in thermal shutdown protection that prevents the IC from overheating and getting damaged.
Q: Can LM4872IBPX be used in stereo applications? A: Yes, LM4872IBPX is specifically designed for stereo audio amplification, allowing it to drive two separate audio channels simultaneously.
Q: What is the typical efficiency of LM4872IBPX? A: The typical efficiency of LM4872IBPX is around 85%, making it an energy-efficient choice for portable devices.
Q: Are there any application notes or reference designs available for LM4872IBPX? A: Yes, Texas Instruments provides application notes and reference designs that offer guidance on using LM4872IBPX in various audio applications, which can be found on their website.

Please note that these answers are general and may vary depending on specific implementation requirements. It's always recommended to refer to the LM4872IBPX datasheet and relevant documentation for accurate information.