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LM4819LD/NOPB
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LM4819LD/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Amplifier

Characteristics: - Low voltage audio power amplifier - Mono channel - Class AB operation - Small package size - High efficiency - Low distortion

Package: LLP (Leadless Package)

Essence: The LM4819LD/NOPB is a low voltage audio power amplifier IC designed for portable devices such as smartphones, tablets, and portable media players. It provides high-quality audio amplification with low power consumption.

Packaging/Quantity: The LM4819LD/NOPB is available in tape and reel packaging. Each reel contains 2500 units.

Specifications

  • Supply Voltage Range: 2.5V to 5.5V
  • Output Power: 1.3W (4Ω, 5V)
  • Total Harmonic Distortion + Noise (THD+N): 0.1% (1kHz, 1.3W)
  • Efficiency: 85%
  • Shutdown Current: 0.01μA (typical)
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The LM4819LD/NOPB has a total of 8 pins:

  1. VDD: Power supply voltage input
  2. SHUTDOWN: Shutdown control input
  3. IN+: Positive audio input
  4. IN-: Negative audio input
  5. GND: Ground
  6. BYPASS: Bypass capacitor connection
  7. OUT: Audio output
  8. NC: No connection

Functional Features

  • Low voltage operation allows integration into battery-powered devices.
  • Class AB operation ensures efficient power utilization and reduced heat dissipation.
  • Low distortion provides high-quality audio reproduction.
  • Shutdown mode allows power-saving when the amplifier is not in use.
  • Bypass capacitor connection improves audio performance.

Advantages and Disadvantages

Advantages: - Low voltage operation extends battery life in portable devices. - Small package size enables compact designs. - High efficiency reduces power consumption. - Low distortion ensures high-quality audio output.

Disadvantages: - Limited output power may not be suitable for high-power audio applications. - Single-channel configuration restricts stereo sound reproduction.

Working Principles

The LM4819LD/NOPB operates as a low voltage audio power amplifier by amplifying the input audio signal. It utilizes Class AB operation, which combines the advantages of Class A and Class B amplifiers to achieve high efficiency and low distortion. The amplifier receives the audio input signal through the IN+ and IN- pins, amplifies it, and delivers the amplified audio signal through the OUT pin.

Detailed Application Field Plans

The LM4819LD/NOPB is commonly used in various portable electronic devices that require audio amplification. Some potential application fields include:

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

Detailed and Complete Alternative Models

  1. LM4861LD/NOPB: Similar low voltage audio power amplifier with higher output power (2W) and improved THD+N performance.
  2. LM4830LD/NOPB: Stereo audio power amplifier IC suitable for applications requiring stereo sound reproduction.
  3. LM4881LD/NOPB: Low voltage audio power amplifier with integrated volume control for simplified system design.

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

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací LM4819LD/NOPB v technických řešeních

  1. What is the LM4819LD/NOPB?

    • The LM4819LD/NOPB is a mono, bridged audio power amplifier designed for use in low-voltage applications.

  2. What is the typical voltage supply range for the LM4819LD/NOPB?

    • The typical voltage supply range for the LM4819LD/NOPB is 2.7V to 5.5V.

  3. What is the output power capability of the LM4819LD/NOPB?

    • The LM4819LD/NOPB can deliver up to 1.1W of continuous average power into an 8Ω load.

  4. What is the recommended application for the LM4819LD/NOPB?

    • The LM4819LD/NOPB is commonly used in portable electronic devices such as smartphones, tablets, and portable media players.

  5. Does the LM4819LD/NOPB require external compensation?

    • No, the LM4819LD/NOPB does not require external compensation, which simplifies the design process.

  6. What is the typical shutdown current of the LM4819LD/NOPB?

    • The typical shutdown current of the LM4819LD/NOPB is 0.01μA, making it suitable for battery-powered applications.

  7. Can the LM4819LD/NOPB operate with a single power supply?

    • Yes, the LM4819LD/NOPB can operate with a single power supply, which enhances its versatility in various applications.

  8. What is the thermal shutdown feature of the LM4819LD/NOPB?

    • The LM4819LD/NOPB includes a thermal shutdown feature that protects the device from overheating.

  9. Is the LM4819LD/NOPB available in a small package?

    • Yes, the LM4819LD/NOPB is available in a small 8-pin WSON package, which is ideal for space-constrained designs.

  10. What are the key advantages of using the LM4819LD/NOPB in technical solutions?

    • The LM4819LD/NOPB offers high efficiency, low quiescent current, and a compact footprint, making it well-suited for portable and low-power applications.