LM4550VH/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Audio Amplifier
• Characteristics: High-performance, low-power stereo audio amplifier
• Package: 14-pin TSSOP (Thin Shrink Small Outline Package)
• Essence: The LM4550VH/NOPB is a stereo audio amplifier IC designed for high-quality audio applications. It provides excellent sound reproduction while consuming minimal power.
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Power Supply Voltage: 2.7V to 5.5V
• Output Power: Up to 1.2W per channel into 8Ω load at 5V supply voltage
• Total Harmonic Distortion + Noise: 0.1% (typical) at 1kHz, 1W output power
• Signal-to-Noise Ratio: 90dB (typical) at 1kHz, 1W output power
• Shutdown Current: 0.01μA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4550VH/NOPB has a 14-pin TSSOP package with the following pin configuration:

1. VDD: Power supply voltage
2. INL: Left channel input
3. INR: Right channel input
4. GND: Ground
5. SHDN: Shutdown control input
6. BYP: Bypass capacitor connection
7. OUTL: Left channel output
8. OUTR: Right channel output
9. NC: No connection
10. NC: No connection
11. NC: No connection
12. NC: No connection
13. NC: No connection
14. VSS: Ground

Functional Features

• High-quality audio amplification with low power consumption
• Single-ended stereo amplifier configuration
• Shutdown control for power-saving mode
• Bypass capacitor connection for improved audio performance
• Small package size for space-constrained applications

Advantages and Disadvantages

Advantages: - High-performance audio amplification - Low power consumption - Shutdown control for power-saving - Small package size

Disadvantages: - Limited output power compared to higher wattage amplifiers - No built-in volume control or equalization features

Working Principles

The LM4550VH/NOPB is a single-ended stereo audio amplifier that operates by amplifying the input audio signals received on the INL and INR pins. The amplified signals are then output through the OUTL and OUTR pins, providing high-quality audio reproduction.

The amplifier can be controlled using the SHDN pin, which allows the device to enter a low-power shutdown mode when not in use. This feature helps conserve power and prolong battery life in portable audio devices.

Detailed Application Field Plans

The LM4550VH/NOPB is suitable for various audio applications, including:

1. Portable audio devices such as MP3 players, smartphones, and tablets
2. Personal computers and laptops
3. Home audio systems
4. Automotive audio systems
5. Gaming consoles and handheld gaming devices

Detailed and Complete Alternative Models

1. TPA3116D2: A high-performance Class-D audio amplifier IC with integrated volume control and equalization features.
2. LM386: A low-power audio amplifier IC suitable for battery-powered applications.
3. MAX9744: A stereo audio amplifier IC with automatic gain control and thermal shutdown protection.

These alternative models offer different features and specifications, allowing designers to choose the most suitable amplifier for their specific application requirements.

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