LM4670SD/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Amplifier

Characteristics: - High-performance audio amplifier - Low power consumption - Small form factor - Wide voltage range operation

Package: SD (Shrink Small Outline Package)

Essence: The LM4670SD/NOPB is a high-performance audio amplifier IC designed for various audio applications. It offers excellent sound quality and low power consumption, making it suitable for portable devices such as smartphones, tablets, and portable media players.

Packaging/Quantity: The LM4670SD/NOPB is available in a small and compact SD package. It is typically sold in reels or tubes containing multiple units.

Specifications

The LM4670SD/NOPB has the following specifications:

• Power Supply Voltage Range: 2.7V to 5.5V
• Output Power: Up to 1.2W per channel
• Total Harmonic Distortion + Noise (THD+N): <0.1%
• Signal-to-Noise Ratio (SNR): >90dB
• Shutdown Current: <1µA
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The LM4670SD/NOPB has a total of 20 pins. The pin configuration is as follows:

1. VDD: Power supply voltage input
2. GND: Ground reference
3. INL: Left channel audio input
4. INR: Right channel audio input
5. SHDN: Shutdown control input
6. BTL: Bridge-tied load output
7. OUTL: Left channel audio output
8. OUTR: Right channel audio output
9. BYP: Bypass capacitor connection
10. NC: No connection
11. NC: No connection
12. NC: No connection
13. NC: No connection
14. NC: No connection
15. NC: No connection
16. NC: No connection
17. NC: No connection
18. NC: No connection
19. NC: No connection
20. NC: No connection

Functional Features

• High-quality audio amplification
• Low power consumption for extended battery life
• Wide voltage range operation for compatibility with various devices
• Bridge-tied load output configuration for improved efficiency and power delivery
• Shutdown control for power management

Advantages and Disadvantages

Advantages: - Excellent sound quality - Low power consumption - Compact size - Wide voltage range operation

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

Working Principles

The LM4670SD/NOPB operates as a class D audio amplifier. It utilizes pulse-width modulation (PWM) techniques to convert the input audio signal into a high-frequency square wave. This square wave is then filtered and amplified to produce the desired audio output.

Detailed Application Field Plans

The LM4670SD/NOPB is commonly used in the following applications:

1. Portable audio devices (smartphones, tablets, portable media players)
2. Bluetooth speakers
3. Headphone amplifiers
4. Automotive audio systems
5. Home audio systems

Detailed and Complete Alternative Models

1. LM4863: 2.2W Audio Power Amplifier
2. TPA3116D2: 50W Stereo Class D Audio Amplifier
3. MAX98357A: Mono Class D Audio Amplifier with Digital Interface
4. TAS5727: 20-W Stereo Class-D Audio Power Amplifier

These alternative models offer similar functionality and can be considered as alternatives to the LM4670SD/NOPB depending on specific requirements and design constraints.

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