LM4961LQX/NOPB

Product Overview

• Category: Audio Amplifier
• Use: The LM4961LQX/NOPB is a mono Class D audio power amplifier designed for portable applications such as mobile phones, tablets, and portable media players.
• Characteristics: The LM4961LQX/NOPB offers high efficiency and low power consumption, making it ideal for battery-powered devices. It provides excellent audio performance with low distortion and noise. The device also features thermal shutdown and short-circuit protection.
• Package: The LM4961LQX/NOPB comes in a small 20-pin LLP package, which is suitable for space-constrained applications.
• Essence: The essence of the LM4961LQX/NOPB is its ability to deliver high-quality audio amplification while consuming minimal power.
• Packaging/Quantity: The LM4961LQX/NOPB is typically sold in reels of 2500 units.

Specifications

• Power Supply Voltage: 2.5V - 5.5V
• Output Power: Up to 1.4W into 8Ω at 5V supply voltage
• Efficiency: Up to 90%
• Total Harmonic Distortion + Noise (THD+N): 0.1% at 1kHz, 0.5W output power
• Shutdown Current: 0.01μA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4961LQX/NOPB has a total of 20 pins. Here is the detailed pin configuration:

1. VDD - Power supply voltage input
2. GND - Ground
3. SD - Shutdown control input
4. INP - Positive audio input
5. INN - Negative audio input
6. VREF - Reference voltage output
7. BYP - Bypass capacitor connection
8. BST - Bootstrap capacitor connection
9. PVDD - Power supply voltage for the power stage
10. PGND - Ground for the power stage
11. OUT - Audio output 12-20. NC - No connection

Functional Features

• High efficiency Class D operation
• Low power consumption
• Excellent audio performance with low distortion and noise
• Thermal shutdown protection
• Short-circuit protection

Advantages and Disadvantages

Advantages: - High efficiency leads to longer battery life in portable devices. - Compact package suitable for space-constrained applications. - Provides high-quality audio amplification.

Disadvantages: - Limited output power compared to some other audio amplifier options. - Requires an external reference voltage.

Working Principles

The LM4961LQX/NOPB is a Class D audio amplifier, which uses pulse-width modulation (PWM) to amplify the audio signal. It converts the analog audio input into a digital PWM signal, which is then amplified by the power stage. The PWM signal switches the power stage transistors on and off rapidly, allowing efficient power delivery to the load (speaker). This results in minimal power loss and high efficiency.

Detailed Application Field Plans

The LM4961LQX/NOPB is commonly used in various portable audio applications, including:

1. Mobile phones
2. Tablets
3. Portable media players
4. Bluetooth speakers
5. Gaming devices

Its small size, low power consumption, and high audio quality make it suitable for these applications where space and battery life are crucial factors.

Alternative Models

Here are some alternative models that offer similar functionality to the LM4961LQX/NOPB:

1. TPA3116D2 - Class D audio amplifier with higher output power.
2. MAX98357A - Class D audio amplifier with integrated digital audio interface.
3. TDA7498E - Class D audio amplifier with dual-channel capability.

These alternative models can be considered based on specific requirements and application needs.

Word count: 446 words