LM4809MM

Product Overview

Category: Integrated Circuit (IC)
Use: Audio Amplifier
Characteristics: High-performance, low-power audio amplifier
Package: Miniature 8-pin SOIC package
Essence: Amplifies audio signals with high fidelity and efficiency
Packaging/Quantity: Available in reels of 2500 units

Specifications

Power Supply Voltage: 2.7V to 5.5V
Output Power: Up to 1.1W
Total Harmonic Distortion: 0.2% (typical)
Shutdown Current: 0.6μA (typical)
Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The LM4809MM has the following pin configuration:

VDD: Power supply voltage input
GND: Ground reference
IN+: Non-inverting audio input
IN-: Inverting audio input
SHUTDOWN: Shutdown control input
BYPASS: Bypass capacitor connection
OUT: Amplified audio output
VSS: Negative power supply voltage input

Functional Features

Low quiescent current consumption
Wide operating voltage range
Thermal shutdown protection
Short-circuit and over-temperature protection
Pop and click suppression during power-up and shutdown

Advantages and Disadvantages

Advantages: - High-quality audio amplification - Low power consumption - Compact package size - Protection features for enhanced reliability

Disadvantages: - Limited output power compared to higher wattage amplifiers - Requires external components for proper operation

Working Principles

The LM4809MM is a class AB audio amplifier that utilizes a bridge-tied load (BTL) configuration. It amplifies audio signals by modulating the input voltage to drive a load, such as a speaker, with increased power and fidelity. The amplifier operates in a low-power state when no audio signal is present, reducing power consumption.

Detailed Application Field Plans

The LM4809MM is suitable for various audio applications, including but not limited to: - Portable devices: MP3 players, smartphones, tablets - Personal computers and laptops - Home audio systems: Mini speakers, multimedia speakers - Automotive audio systems: Car radios, amplifiers

Detailed and Complete Alternative Models

LM4861MM: 1.1W Audio Power Amplifier, 8-pin SOIC package
LM386N-4: Low Voltage Audio Power Amplifier, 8-pin DIP package
TPA3116D2: 50W Stereo Class D Audio Amplifier, 20-pin HTSSOP package
MAX9744: 20W Stereo Class D Audio Power Amplifier, 28-pin TQFN package

These alternative models offer different power outputs, package types, and additional features to cater to specific application requirements.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací LM4809MM v technických řešeních

Sure! Here are 10 common questions and answers related to the application of LM4809MM in technical solutions:

Q: What is LM4809MM? A: LM4809MM is a dual audio power amplifier IC designed for use in portable devices, such as smartphones, tablets, and portable media players.
Q: What is the maximum output power of LM4809MM? A: The maximum output power of LM4809MM is typically 1.1 watts per channel into an 8-ohm load with a 5V power supply.
Q: Can LM4809MM operate on a single power supply? A: Yes, LM4809MM can operate on a single power supply ranging from 2.7V to 5.5V.
Q: Does LM4809MM require any external components for operation? A: Yes, LM4809MM requires a few external components like capacitors, resistors, and input coupling capacitors for proper operation.
Q: What is the input voltage range of LM4809MM? A: The input voltage range of LM4809MM is typically ±0.15V to ±1.35V.
Q: Can LM4809MM drive headphones directly? A: Yes, LM4809MM can drive headphones directly as it has a built-in headphone driver circuitry.
Q: Is LM4809MM suitable for stereo applications? A: Yes, LM4809MM is designed for stereo applications and can drive two speakers or headphones simultaneously.
Q: Does LM4809MM have thermal shutdown protection? A: Yes, LM4809MM has built-in thermal shutdown protection that prevents the IC from overheating.
Q: Can LM4809MM be used in battery-powered devices? A: Yes, LM4809MM is suitable for battery-powered devices due to its low power consumption and wide operating voltage range.
Q: What are the typical applications of LM4809MM? A: LM4809MM is commonly used in portable audio devices, multimedia systems, gaming consoles, and other consumer electronics where compact size and high-quality audio output are required.

Please note that these answers are general and may vary depending on specific design considerations and application requirements.