LM4673SD/NOPB

Product Overview

Category: Integrated Circuits (ICs)

Use: The LM4673SD/NOPB is a high-performance audio amplifier designed for portable devices such as smartphones, tablets, and portable media players. It provides high-quality audio amplification for improved sound output in compact electronic devices.

Characteristics: - High efficiency - Low power consumption - Small form factor - Excellent audio quality - Wide supply voltage range

Package: The LM4673SD/NOPB comes in a small outline package (SOP) with dimensions of 5mm x 6.4mm. This compact package allows for easy integration into space-constrained electronic devices.

Essence: The essence of the LM4673SD/NOPB lies in its ability to deliver high-quality audio amplification while consuming minimal power and occupying a small footprint. It enhances the audio experience in portable devices without compromising on performance.

Packaging/Quantity: The LM4673SD/NOPB is typically sold in reels containing 2500 units per reel.

Specifications

• 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 LM4673SD/NOPB has a total of 16 pins. The pin configuration is as follows:

1. VDD: Power supply voltage input
2. GND: Ground reference
3. SD: Shutdown control input
4. INL: Left channel audio input
5. INR: Right channel audio input
6. BST: Bootstrap capacitor connection for internal charge pump
7. VBST: Boosted supply voltage output
8. PVDD: Power supply voltage for the charge pump
9. PGND: Ground reference for the charge pump
10. OUTL: Left channel audio output
11. OUTR: Right channel audio output
12. BCL: Bypass capacitor connection for left channel
13. BCR: Bypass capacitor connection for right channel
14. BYP: Bypass capacitor connection for internal bias network
15. AGND: Analog ground reference
16. NC: No connection

Functional Features

• Class D amplifier architecture for high efficiency
• Integrated charge pump for boosted supply voltage
• Short-circuit and thermal protection
• Pop and click suppression during power-up and shutdown
• Low quiescent current in shutdown mode

Advantages and Disadvantages

Advantages: - High audio quality with low distortion - Efficient power consumption - Compact size for easy integration - Protection features for enhanced reliability - Pop and click suppression for improved user experience

Disadvantages: - Limited output power compared to larger amplifiers - Requires external components for proper operation - Sensitive to noise interference

Working Principles

The LM4673SD/NOPB utilizes a Class D amplifier architecture, which allows for high efficiency by switching the output stage between the supply rails. It incorporates a charge pump to boost the supply voltage, enabling higher output power from a lower input voltage.

When audio signals are received at the inputs (INL and INR), the LM4673SD/NOPB amplifies them and delivers the amplified signals to the respective outputs (OUTL and OUTR). The integrated protection circuitry safeguards against short circuits and excessive temperature.

During power-up and shutdown, the LM4673SD/NOPB suppresses pop and click noises to prevent any audible disturbances. In shutdown mode, the amplifier consumes minimal current, prolonging battery life in portable devices.

Detailed Application Field Plans

The LM4673SD/NOPB is widely used in various portable electronic devices that require audio amplification. Some of its application fields include:

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

Its compact size, low power consumption, and high audio quality make it suitable for enhancing the audio experience in these devices.

Detailed and Complete Alternative Models

1. LM4863: Similar audio amplifier with higher output power capability.
2. TPA3116D2: Class D audio amplifier with integrated digital-to-analog converter (DAC).
3. MAX98357A: Low-power audio amplifier with built-in digital audio interface.

These alternative models offer different features and specifications, providing options based on specific requirements and design considerations.

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