Texas Instruments
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LM4871LD/NOPB
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LM4871LD/NOPB

Product Overview

Category

LM4871LD/NOPB belongs to the category of audio power amplifiers.

Use

It is used to amplify audio signals and drive speakers in various electronic devices such as mobile phones, tablets, and portable media players.

Characteristics

  • High efficiency
  • Low quiescent current
  • Low distortion
  • Short-circuit and thermal protection

Package

The LM4871LD/NOPB comes in a small 8-pin surface mount package.

Essence

The essence of LM4871LD/NOPB lies in its ability to provide high-quality audio amplification in a compact and efficient package.

Packaging/Quantity

The LM4871LD/NOPB is typically available in reels containing 2500 units.

Specifications

  • Operating Voltage: 2.7V to 5.5V
  • Output Power: 3W (typical) into 3Ω at 5V
  • Total Harmonic Distortion + Noise (THD+N): 0.15% (typical) at 1kHz, 1.5W, 4Ω
  • Shutdown Current: 0.6μA (typical)

Detailed Pin Configuration

The LM4871LD/NOPB has the following pin configuration: 1. VDD (Power supply) 2. GND (Ground) 3. SD (Shutdown) 4. IN- (Negative input) 5. IN+ (Positive input) 6. BP (Bypass) 7. OUT (Output) 8. VSS (Ground)

Functional Features

  • Low quiescent current in shutdown mode
  • Thermal shutdown protection
  • Short-circuit protection
  • Unity-gain stable

Advantages and Disadvantages

Advantages

  • High efficiency
  • Low distortion
  • Small package size
  • Thermal and short-circuit protection

Disadvantages

  • Limited output power compared to larger amplifiers
  • Requires external components for operation

Working Principles

The LM4871LD/NOPB operates by amplifying the input audio signal and delivering it to the connected speaker with minimal distortion and high efficiency. It utilizes a low quiescent current design to minimize power consumption and includes built-in protection features to ensure reliable operation.

Detailed Application Field Plans

The LM4871LD/NOPB is well-suited for use in portable electronic devices such as smartphones, tablets, portable media players, and other battery-powered applications where high-quality audio amplification is required in a compact form factor.

Detailed and Complete Alternative Models

Some alternative models to LM4871LD/NOPB include: - TPA2012D2 from Texas Instruments - MAX98306 from Maxim Integrated - PAM8403 from Diodes Incorporated

In conclusion, the LM4871LD/NOPB is a versatile audio power amplifier suitable for various portable electronic devices, offering high efficiency, low distortion, and essential protection features in a compact package.

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Énumérez 10 questions et réponses courantes liées à l'application de LM4871LD/NOPB dans les solutions techniques

  1. What is the LM4871LD/NOPB?

    • The LM4871LD/NOPB is a mono, bridged audio power amplifier designed for use in low voltage applications.

  2. What is the typical operating voltage range for the LM4871LD/NOPB?

    • The typical operating voltage range for the LM4871LD/NOPB is 2.7V to 5.5V.

  3. What is the output power capability of the LM4871LD/NOPB?

    • The LM4871LD/NOPB can deliver up to 1W of continuous average power into an 8Ω load.

  4. What is the recommended application circuit for the LM4871LD/NOPB?

    • The recommended application circuit includes input and output coupling capacitors, as well as a bypass capacitor for the power supply.

  5. What are the key features of the LM4871LD/NOPB?

    • The key features include low quiescent current, shutdown mode, thermal shutdown protection, and short-circuit protection.

  6. Can the LM4871LD/NOPB be used in portable audio devices?

    • Yes, the LM4871LD/NOPB is suitable for use in portable audio devices due to its low voltage operation and small package size.

  7. What is the efficiency of the LM4871LD/NOPB?

    • The efficiency of the LM4871LD/NOPB is typically around 85% at 500mW output power.

  8. Does the LM4871LD/NOPB require external heat sinking?

    • No, the LM4871LD/NOPB does not require external heat sinking under normal operating conditions.

  9. Is the LM4871LD/NOPB suitable for battery-powered applications?

    • Yes, the LM4871LD/NOPB is well-suited for battery-powered applications due to its low operating voltage and efficient power consumption.

  10. What are the typical applications for the LM4871LD/NOPB?

    • Typical applications include portable audio players, mobile phones, personal digital assistants (PDAs), and other low voltage audio systems.