LM49450SQ/NOPB

Product Overview

• Category: Integrated Circuit
• Use: Audio Amplifier
• Characteristics: High-performance, low-power stereo audio amplifier
• Package: 16-pin LLP (Leadless Leadframe Package)
• Essence: Provides high-quality audio amplification in a compact form factor
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Power Supply Voltage: 2.5V to 5.5V
• Output Power: 1.2W per channel into 8Ω load at 5V supply voltage
• Total Harmonic Distortion + Noise: 0.03% at 1kHz, 1.2W output power
• Shutdown Current: 0.01μA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM49450SQ/NOPB features a 16-pin LLP package with the following pin configuration:

1. VDD
2. GND
3. SD (Shutdown)
4. INL- (Left Channel Negative Input)
5. INL+ (Left Channel Positive Input)
6. BYP (Bypass Capacitor)
7. OUTL (Left Channel Output)
8. PVDD (Power Supply for Output Stage)
9. PGND (Ground for Output Stage)
10. OUTR (Right Channel Output)
11. INR+ (Right Channel Positive Input)
12. INR- (Right Channel Negative Input)
13. MUTE (Mute Control)
14. BIAS (Bias Voltage)
15. NC (No Connection)
16. VREF (Reference Voltage)

Functional Features

• High-quality stereo audio amplification
• Low-power consumption
• Shutdown mode for power saving
• Built-in mute control
• Bypass capacitor for improved audio performance
• Thermal shutdown protection

Advantages and Disadvantages

Advantages: - High-performance audio amplification - Low-power consumption - Compact package size - Shutdown mode for power saving - Built-in thermal shutdown protection

Disadvantages: - Limited output power compared to higher wattage amplifiers - Requires external bypass capacitor for optimal audio performance

Working Principles

The LM49450SQ/NOPB is a stereo audio amplifier that operates on a power supply voltage ranging from 2.5V to 5.5V. It utilizes a class AB amplifier architecture to provide high-quality audio amplification with low distortion and noise.

The amplifier can deliver up to 1.2W of power per channel into an 8Ω load at a 5V supply voltage. It features a shutdown mode, which reduces the current consumption to a minimum when not in use, making it suitable for battery-powered applications.

The LM49450SQ/NOPB also includes built-in thermal shutdown protection, which prevents the device from overheating under abnormal operating conditions.

Detailed Application Field Plans

The LM49450SQ/NOPB is commonly used in various audio applications, including:

1. Portable media players
2. Mobile phones
3. Tablets
4. Laptop computers
5. Bluetooth speakers
6. Gaming consoles
7. Automotive infotainment systems

Its compact form factor, low-power consumption, and high-quality audio amplification make it ideal for these applications where space and power efficiency are crucial.

Detailed and Complete Alternative Models

1. LM4863SQ/NOPB: Stereo Audio Amplifier, 2.2W per channel, 16-pin LLP package
2. LM386N-1/NOPB: Audio Power Amplifier, 325mW, 8-pin DIP package
3. TPA3116D2PWPR: Class D Audio Amplifier, 50W per channel, 20-pin HTSSOP package
4. MAX9744ETJ+: Stereo Class D Audio Power Amplifier, 20W per channel, 32-pin TQFN package

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

In conclusion, the LM49450SQ/NOPB is a high-performance, low-power stereo audio amplifier that provides excellent audio amplification in a compact form factor. Its features, such as shutdown mode, thermal protection, and bypass capacitor, make it suitable for a wide range of audio applications. However, it has limitations in terms of output power compared to higher wattage amplifiers. Alternative models are available with varying specifications to meet specific application needs.