LM4905LQX

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Power Amplifier

Characteristics: - High-quality audio amplification - Low power consumption - Small form factor - Wide voltage range operation

Package: QFN (Quad Flat No-leads)

Essence: The LM4905LQX is a high-performance audio power amplifier IC designed for various portable audio applications.

Packaging/Quantity: The LM4905LQX is available in tape and reel packaging, with 2500 units per reel.

Specifications

Supply Voltage Range: 2.7V to 5.5V
Output Power: Up to 1.1W
Total Harmonic Distortion (THD): 0.1% (typical)
Efficiency: 85% (typical)
Shutdown Current: 0.01µA (typical)
Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4905LQX features a 16-pin QFN package with the following pin configuration:

VDD: Positive supply voltage
IN+: Non-inverting input
IN-: Inverting input
GND: Ground
SHDN: Shutdown control input
BYP: Bypass capacitor connection
OUT: Amplifier output
NC: No connection
NC: No connection
NC: No connection
NC: No connection
NC: No connection
NC: No connection
NC: No connection
NC: No connection
VSS: Negative supply voltage

Functional Features

Low quiescent current
Thermal shutdown protection
Short-circuit protection
Pop and click suppression
External gain configuration

Advantages and Disadvantages

Advantages: - High-quality audio amplification - Low power consumption - Small form factor for portable applications - Wide voltage range operation allows flexibility in power supply selection

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

Working Principles

The LM4905LQX is a class AB audio power amplifier that utilizes a bridge-tied load (BTL) configuration. It operates by amplifying the input audio signal and delivering it to the load (e.g., speaker) with improved efficiency and reduced distortion.

Detailed Application Field Plans

The LM4905LQX is suitable for various portable audio applications, including but not limited to: - Mobile phones - Portable media players - Bluetooth speakers - Gaming devices - Personal digital assistants (PDAs)

Alternative Models

LM4863LQX: Similar audio power amplifier IC with higher output power capability.
LM4950LQX: Audio power amplifier IC with integrated volume control functionality.
LM4990LQX: Low-power audio power amplifier IC designed for battery-powered applications.

These alternative models offer different features and specifications to cater to specific application requirements.

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Texniki həllərdə LM4905LQX tətbiqi ilə bağlı 10 ümumi sual və cavabı sadalayın

Sure! Here are 10 common questions and answers related to the application of LM4905LQX in technical solutions:

Question: What is LM4905LQX?
Answer: LM4905LQX is a low-power audio amplifier designed for use in portable devices such as smartphones, tablets, and portable media players.
Question: What is the maximum output power of LM4905LQX?
Answer: The maximum output power of LM4905LQX is typically 1.1 Watts into an 8-ohm load with a 5V power supply.
Question: Can LM4905LQX operate from a single power supply?
Answer: Yes, LM4905LQX can operate from a single power supply ranging from 2.7V to 5.5V.
Question: What is the input voltage range of LM4905LQX?
Answer: The input voltage range of LM4905LQX is typically 0.15V to 1.5V.
Question: Does LM4905LQX require external components for operation?
Answer: Yes, LM4905LQX requires a few external components such as capacitors and resistors for proper operation.
Question: Can LM4905LQX drive headphones directly?
Answer: Yes, LM4905LQX can drive headphones directly as it has a built-in headphone driver circuit.
Question: Is LM4905LQX suitable for battery-powered applications?
Answer: Yes, LM4905LQX is designed for low-power applications and is well-suited for battery-powered devices.
Question: What is the typical quiescent current of LM4905LQX?
Answer: The typical quiescent current of LM4905LQX is around 1.8mA.
Question: Can LM4905LQX be used in stereo applications?
Answer: Yes, LM4905LQX can be used in stereo applications by using two amplifiers for left and right channels.
Question: What are the typical applications of LM4905LQX?
Answer: Some typical applications of LM4905LQX include portable audio devices, smartphones, tablets, gaming consoles, and other battery-powered devices requiring audio amplification.

Please note that the answers provided here are general and may vary depending on specific design considerations and requirements. It's always recommended to refer to the LM4905LQX datasheet and consult with an experienced engineer for detailed application-specific guidance.