LM4842MH/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Amplifier

Characteristics: - High-performance audio amplifier - Low power consumption - Small form factor - Suitable for portable electronic devices

Package: PowerPAD HTSSOP-28

Essence: The LM4842MH/NOPB is a high-performance audio amplifier IC designed for use in portable electronic devices. It provides excellent sound quality while consuming minimal power.

Packaging/Quantity: The LM4842MH/NOPB is available in a PowerPAD HTSSOP-28 package. It is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Output Power: 1.2W per channel into 8Ω load at 5V supply
• Total Harmonic Distortion + Noise (THD+N): 0.1% (typical)
• Shutdown Current: 0.01μA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4842MH/NOPB has a total of 28 pins. The pin configuration is as follows:

Pin 1: VDD Pin 2: SD Pin 3: GND Pin 4: INL- Pin 5: INL+ Pin 6: BYP Pin 7: OUTL Pin 8: PVDD Pin 9: PVDD Pin 10: PVDD Pin 11: PVDD Pin 12: PVDD Pin 13: PVDD Pin 14: PVDD Pin 15: PVDD Pin 16: PVDD Pin 17: PVDD Pin 18: PVDD Pin 19: PVDD Pin 20: PVDD Pin 21: PVDD Pin 22: PVDD Pin 23: PVDD Pin 24: OUTR Pin 25: BYN Pin 26: INR+ Pin 27: INR- Pin 28: GND

Functional Features

• Single-ended or differential input configuration
• Integrated shutdown control for power saving
• Thermal shutdown protection
• Short-circuit and over-temperature protection
• Pop and click suppression during power-up and shutdown

Advantages and Disadvantages

Advantages: - High-performance audio amplification - Low power consumption - Small form factor - Integrated protection features - Suitable for portable electronic devices

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

Working Principles

The LM4842MH/NOPB is a class AB audio amplifier that operates on a single supply voltage. It utilizes a bridge-tied load (BTL) configuration to provide amplified audio output. The amplifier accepts either single-ended or differential input signals, making it versatile for various audio sources.

The integrated shutdown control allows the amplifier to enter a low-power state when not in use, reducing overall power consumption. The thermal shutdown protection ensures safe operation by preventing excessive heat buildup. Additionally, the amplifier includes pop and click suppression circuitry to eliminate unwanted noise during power-up and shutdown.

Detailed Application Field Plans

The LM4842MH/NOPB is widely used in portable electronic devices that require high-quality audio amplification. Some common application fields include:

1. Mobile phones and smartphones
2. Portable media players
3. Tablets and laptops
4. Bluetooth speakers
5. Gaming consoles

Detailed and Complete Alternative Models

1. LM4863MH/NOPB: Similar audio amplifier IC with higher output power capability.
2. LM4881MH/NOPB: Audio amplifier IC with differential input configuration and lower power consumption.
3. LM4950MH/NOPB: Stereo audio amplifier IC with integrated volume control.

These alternative models offer different features and specifications to cater to specific application requirements.

In conclusion, the LM4842MH/NOPB is a high-performance audio amplifier IC designed for portable electronic devices. It offers excellent sound quality, low power consumption, and integrated protection features. Its small form factor and versatile input configuration make it suitable for a wide range of applications.