LM4809LQX/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Amplifier

Characteristics: - Low voltage audio power amplifier - Mono channel - Class AB operation - Small package size - High efficiency

Package: QFN (Quad Flat No-leads)

Essence: The LM4809LQX/NOPB is a low voltage audio power amplifier IC designed for use in portable electronic devices such as smartphones, tablets, and portable media players. It provides high-quality audio amplification with low power consumption.

Packaging/Quantity: The LM4809LQX/NOPB is available in a QFN package. Each package contains one IC.

Specifications

• Supply Voltage: 2.7V to 5.5V
• Output Power: 1.25W (4Ω load, 5V supply)
• Total Harmonic Distortion + Noise (THD+N): 0.1% (1kHz, 1.25W)
• Efficiency: 85% (4Ω load, 5V supply)
• Shutdown Current: 0.01μA (typical)
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The LM4809LQX/NOPB has a total of 16 pins. Here is the detailed pin configuration:

1. VDD: Positive power supply
2. GND: Ground
3. SHUTDOWN: Shutdown control input
4. BYPASS: Bypass capacitor connection
5. IN+: Non-inverting input
6. IN-: Inverting input
7. VOUT: Amplified audio output
8. GND: Ground
9. GND: Ground
10. GND: Ground
11. GND: Ground
12. GND: Ground
13. GND: Ground
14. GND: Ground
15. GND: Ground
16. VDD: Positive power supply

Functional Features

• Low voltage operation allows for use in battery-powered devices.
• Class AB operation provides high-quality audio amplification with low distortion.
• Shutdown control feature allows for power saving when the amplifier is not in use.
• Bypass capacitor connection improves stability and reduces noise.

Advantages and Disadvantages

Advantages: - Low voltage operation extends battery life in portable devices. - High efficiency results in less power consumption. - Small package size saves space on PCBs. - Class AB operation ensures high-quality audio output.

Disadvantages: - Limited output power compared to higher wattage amplifiers. - Mono channel limits stereo sound reproduction.

Working Principles

The LM4809LQX/NOPB operates as a low voltage audio power amplifier by amplifying the input audio signal received at the non-inverting input (IN+). The amplified audio signal is then output through the VOUT pin. The class AB operation ensures low distortion and high-quality audio output.

Detailed Application Field Plans

The LM4809LQX/NOPB is suitable for various applications, including: 1. Portable electronic devices such as smartphones, tablets, and portable media players. 2. Bluetooth speakers and wireless headphones. 3. Automotive audio systems. 4. Home audio equipment. 5. Gaming consoles and handheld gaming devices.

Detailed and Complete Alternative Models

1. LM4863LQX/NOPB: Similar low voltage audio power amplifier IC with stereo output capability.
2. LM386LQX/NOPB: Low voltage audio power amplifier IC with lower output power but smaller package size.
3. TPA3116D2/NOPB: Class D audio amplifier IC with higher output power and efficiency.

(Note: This is not an exhaustive list of alternative models. Please refer to the manufacturer's datasheets for a complete list of alternatives.)

Word count: 511 words