LM4905LD/NOPB

Product Overview

Category: Audio Amplifier
Use: Low voltage audio power amplifier
Characteristics: High efficiency, low distortion, small package size
Package: LLP-8 (Leadless Package)
Essence: LM4905LD/NOPB is a high-performance audio amplifier designed for low voltage applications.
Packaging/Quantity: Available in reels of 2500 units

Specifications

• Output Power: 1.1W at 5V, 10% THD+N, 1kHz
• Efficiency: 87% at 300mW into 8Ω
• Quiescent Current: 1.6mA
• Shutdown Current: 0.01μA
• Operating Voltage Range: 2.0V to 5.5V
• **Shutdown Function
• **Short-Circuit and Thermal Protection

Detailed Pin Configuration

1. OUT-: Output connection for negative terminal
2. GND: Ground connection
3. IN+: Positive input terminal
4. SHDN: Shutdown pin
5. BYPASS: Bypass pin for internal regulator
6. VDD: Positive supply voltage
7. OUT+: Output connection for positive terminal
8. BP/MODE: Bypass or mode select pin

Functional Features

• Low Quiescent Current: Enables longer battery life in portable applications
• Shutdown Mode: Allows for power conservation when not in use
• Short-Circuit and Thermal Protection: Safeguards the device and connected components

Advantages and Disadvantages

Advantages: - High efficiency - Low distortion - Small package size - Shutdown function for power conservation

Disadvantages: - Limited output power compared to higher voltage amplifiers - Requires external bypass capacitor for optimal performance

Working Principles

LM4905LD/NOPB operates by amplifying low voltage audio signals with high efficiency and low distortion. It utilizes a shutdown function to conserve power when not in use and incorporates short-circuit and thermal protection to ensure reliable operation.

Detailed Application Field Plans

LM4905LD/NOPB is suitable for various low voltage audio applications such as portable speakers, headphones, and small audio devices. Its low quiescent current and shutdown mode make it ideal for battery-powered systems where power efficiency is crucial.

Detailed and Complete Alternative Models

• LM4863: Higher output power at the expense of operating voltage range
• LM4880: Lower quiescent current but with a larger package size
• LM4990: Similar efficiency and output power with different pin configuration

This completes the entry for LM4905LD/NOPB according to the English editing encyclopedia structure format.