LM4937TL/NOPB

Product Overview

• Category: Audio Amplifier
• Use: The LM4937TL/NOPB is a stereo audio amplifier designed for portable devices such as smartphones, tablets, and portable media players.
• Characteristics: It provides high-quality audio amplification with low power consumption, making it ideal for battery-powered devices. The LM4937TL/NOPB also includes features like volume control, bass boost, and speaker protection.
• Package: The LM4937TL/NOPB comes in a small 32-pin QFN package, which is suitable for space-constrained applications.
• Essence: The essence of the LM4937TL/NOPB is to provide efficient and high-quality audio amplification for portable devices.
• Packaging/Quantity: The LM4937TL/NOPB is typically sold in reels of 2500 units.

Specifications

• Power Supply Voltage: 2.5V - 5.5V
• Output Power: Up to 1.3W per channel into 8Ω load at 5V supply voltage
• Total Harmonic Distortion + Noise (THD+N): 0.03% at 1kHz, 1.2W output power
• Signal-to-Noise Ratio (SNR): 95dB
• Shutdown Current: 0.01μA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4937TL/NOPB has a total of 32 pins. Here is the detailed pin configuration:

1. VDD
2. GND
3. SDZ
4. SDA
5. SCL
6. INT
7. LOUTN
8. LOUTP
9. LINN
10. LINP
11. VDD
12. GND
13. RINP
14. RINN
15. ROUTP
16. ROUTN
17. VDD
18. GND
19. BSTL
20. BSTH
21. VDD
22. GND
23. VREF
24. AGND
25. AVDD
26. SPKL
27. SPKR
28. VDD
29. GND
30. SDZ
31. SDA
32. SCL

Functional Features

• High-quality stereo audio amplification
• Low power consumption
• Volume control
• Bass boost
• Speaker protection circuitry

Advantages and Disadvantages

Advantages: - High-quality audio amplification - Low power consumption - Compact package size - Integrated volume control and bass boost

Disadvantages: - Limited output power compared to larger audio amplifiers - Not suitable for high-power audio applications

Working Principles

The LM4937TL/NOPB operates by receiving an audio input signal and amplifying it to drive speakers or headphones. It utilizes a combination of analog and digital circuitry to provide high-quality audio amplification while minimizing power consumption.

Detailed Application Field Plans

The LM4937TL/NOPB is commonly used in the following applications:

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

Detailed and Complete Alternative Models

Here are some alternative models that offer similar functionality to the LM4937TL/NOPB:

1. MAX98357A - Stereo Class D Audio Amplifier
2. TPA3116D2 - 50W Stereo Class D Audio Amplifier
3. TAS5720 - Digital Input Class D Audio Amplifier
4. LM386 - Low Voltage Audio Power Amplifier

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

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