LM4674ATLX/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Amplifier

Characteristics: - High-performance audio amplifier - Low power consumption - Small form factor - Wide voltage range operation

Package: Thin Shrink Small Outline Package (TSSOP)

Essence: The LM4674ATLX/NOPB is a high-performance audio amplifier IC designed for various audio applications. It offers excellent sound quality and low power consumption, making it suitable for portable devices such as smartphones, tablets, and portable media players.

Packaging/Quantity: The LM4674ATLX/NOPB is typically sold in reels containing 2500 units per reel.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Output Power: Up to 1.2W
• Total Harmonic Distortion + Noise (THD+N): 0.03%
• Signal-to-Noise Ratio (SNR): 100dB
• Shutdown Current: 0.01μA
• Operating Temperature Range: -40°C to 85°C

Pin Configuration

The LM4674ATLX/NOPB has a total of 20 pins. Here is the detailed pin configuration:

1. VDD: Power supply voltage
2. GND: Ground reference
3. SD: Shutdown control input
4. INP: Positive differential input
5. INN: Negative differential input
6. BYP: Bypass capacitor connection
7. OUTN: Negative output
8. OUTP: Positive output
9. BST: Boost capacitor connection
10. AGND: Analog ground reference
11. PGND: Power ground reference
12. VDD: Power supply voltage
13. GND: Ground reference
14. SD: Shutdown control input
15. INP: Positive differential input
16. INN: Negative differential input
17. BYP: Bypass capacitor connection
18. OUTN: Negative output
19. OUTP: Positive output
20. BST: Boost capacitor connection

Functional Features

• High-quality audio amplification
• Low power consumption for extended battery life
• Wide voltage range operation for compatibility with various power sources
• Built-in shutdown control for power-saving mode
• Thermal and short-circuit protection

Advantages and Disadvantages

Advantages: - Excellent sound quality - Low power consumption - Compact size - Wide voltage range operation

Disadvantages: - Limited output power compared to larger audio amplifiers - Requires external components for proper functionality

Working Principles

The LM4674ATLX/NOPB is based on a class D amplifier architecture, which efficiently converts the input audio signal into a high-power output signal. It utilizes pulse-width modulation (PWM) techniques to achieve high efficiency and low power dissipation.

When an audio signal is applied to the input pins (INP and INN), the LM4674ATLX/NOPB amplifies it and generates a corresponding amplified output signal at the OUTP and OUTN pins. The boost capacitor (BST) helps provide the necessary voltage swing for efficient amplification.

Detailed Application Field Plans

The LM4674ATLX/NOPB can be used in various audio applications, including: - Portable devices (smartphones, tablets, portable media players) - Bluetooth speakers - Gaming consoles - Personal computers - Automotive audio systems

Its compact size, low power consumption, and high-quality audio amplification make it suitable for these applications.

Alternative Models

Here are some alternative models that offer similar functionality:

1. LM4863: Dual 2.2W Audio Amplifier
2. TPA3116D2: 50W Stereo Class D Audio Amplifier
3. MAX9744: 20W Stereo Class D Audio Power Amplifier

These alternative models can be considered based on specific requirements and design constraints.

In conclusion, the LM4674ATLX/NOPB is a high-performance audio amplifier IC that offers excellent sound quality, low power consumption, and compact size. It is widely used in portable devices and various audio applications. While it has some limitations in terms of output power and external component requirements, its advantages outweigh the disadvantages, making it a popular choice for audio amplification needs.