Texas Instruments
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LM4804LQ
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LM4804LQ

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Amplifier

Characteristics: - Small-sized and low-power audio amplifier - Designed for portable electronic devices - Provides high-quality audio output - Operates on a single power supply - Suitable for battery-powered applications

Package: QFN (Quad Flat No-leads) package

Essence: The LM4804LQ is an integrated circuit that amplifies audio signals, making it suitable for use in various portable electronic devices.

Packaging/Quantity: Available in reels of 2500 units per reel.

Specifications

  • Supply Voltage Range: 2.7V to 5.5V
  • Output Power: Up to 1W
  • Total Harmonic Distortion (THD): <0.5%
  • Shutdown Current: <1µA
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The LM4804LQ has a total of 20 pins. Here is the detailed pin configuration:

  1. VDD: Positive power supply
  2. GND: Ground reference
  3. SD: Shutdown control input
  4. IN+: Non-inverting input
  5. IN-: Inverting input
  6. BYP: Bypass capacitor connection
  7. OUT: Amplified audio output
  8. NC: Not connected
  9. NC: Not connected
  10. NC: Not connected
  11. NC: Not connected
  12. NC: Not connected
  13. NC: Not connected
  14. NC: Not connected
  15. NC: Not connected
  16. NC: Not connected
  17. NC: Not connected
  18. NC: Not connected
  19. NC: Not connected
  20. NC: Not connected

Functional Features

  • Low quiescent current consumption
  • Thermal shutdown protection
  • Short-circuit and over-temperature protection
  • Pop and click suppression during power-up and shutdown

Advantages and Disadvantages

Advantages: - Small size and low power consumption - High-quality audio output - Suitable for battery-powered devices - Provides thermal and short-circuit protection

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

Working Principles

The LM4804LQ is a class AB audio amplifier that operates on a single power supply. It amplifies the input audio signal and provides an amplified output signal with low distortion. The amplifier circuitry ensures efficient power usage and protects against thermal overload and short circuits.

Detailed Application Field Plans

The LM4804LQ is commonly used in various portable electronic devices, including: - Mobile phones - MP3 players - Portable gaming consoles - Bluetooth speakers - Personal digital assistants (PDAs)

Detailed and Complete Alternative Models

  1. LM4861: Similar low-power audio amplifier IC with stereo output capability.
  2. TPA3116D2: Higher power audio amplifier IC suitable for home audio systems.
  3. MAX98357A: Integrated audio amplifier with digital input interface.

These alternative models offer different features and power capabilities, allowing designers to choose the most suitable option for their specific application requirements.

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רשום 10 שאלות ותשובות נפוצות הקשורות ליישום של LM4804LQ בפתרונות טכניים

Sure! Here are 10 common questions and answers related to the application of LM4804LQ in technical solutions:

  1. Question: What is LM4804LQ?
    Answer: LM4804LQ is a low-power audio amplifier designed for use in portable devices such as smartphones, tablets, and portable media players.

  2. Question: What is the maximum output power of LM4804LQ?
    Answer: The maximum output power of LM4804LQ is typically 1.5 Watts into an 8-ohm load with a 5V power supply.

  3. Question: Can LM4804LQ operate on a single power supply?
    Answer: Yes, LM4804LQ can operate on a single power supply ranging from 2.7V to 5.5V.

  4. Question: What is the input voltage range of LM4804LQ?
    Answer: The input voltage range of LM4804LQ is typically 0.15V to 1.5V.

  5. Question: Does LM4804LQ require any external components?
    Answer: Yes, LM4804LQ requires a few external components such as capacitors, resistors, and an input coupling capacitor.

  6. Question: Can LM4804LQ drive both headphones and speakers?
    Answer: Yes, LM4804LQ can drive both headphones and speakers, making it suitable for various audio applications.

  7. Question: Is LM4804LQ capable of driving low-impedance loads?
    Answer: Yes, LM4804LQ is designed to drive loads as low as 4 ohms, making it suitable for driving small speakers or headphones.

  8. Question: Does LM4804LQ have built-in thermal protection?
    Answer: Yes, LM4804LQ has built-in thermal protection that prevents the device from overheating during operation.

  9. Question: Can LM4804LQ be used in battery-powered applications?
    Answer: Yes, LM4804LQ is designed for low-power applications and can be used in battery-powered devices.

  10. Question: What is the typical quiescent current of LM4804LQ?
    Answer: The typical quiescent current of LM4804LQ is around 3.5mA, making it suitable for power-sensitive applications.

Please note that these answers are general and may vary depending on the specific application and implementation of LM4804LQ. It's always recommended to refer to the datasheet and consult with the manufacturer for detailed information.