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LM4990MM/NOPB

LM4990MM/NOPB

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Audio Amplifier
  • Characteristics: High-performance, low-power audio amplifier
  • Package: 8-pin SOIC (Small Outline Integrated Circuit)
  • Essence: The LM4990MM/NOPB is a high-quality audio amplifier designed for portable devices such as smartphones, tablets, and portable media players.
  • Packaging/Quantity: Available in reels of 2500 units.

Specifications

  • Power Supply Voltage: 2.7V to 5.5V
  • Output Power: Up to 1W
  • 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 LM4990MM/NOPB has the following pin configuration:

  1. VDD: Power supply voltage input
  2. GND: Ground reference
  3. IN+: Positive audio input
  4. IN-: Negative audio input
  5. SHUTDOWN: Shutdown control input
  6. BYPASS: Bypass capacitor connection
  7. OUT: Audio output
  8. VOUT: Output voltage reference

Functional Features

  • Low power consumption
  • High signal-to-noise ratio (SNR)
  • Wide operating voltage range
  • Short-circuit and thermal protection
  • Shutdown mode for power saving

Advantages and Disadvantages

Advantages: - High-quality audio amplification - Low power consumption - Compact package size - Protection features ensure device longevity

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

Working Principles

The LM4990MM/NOPB is a class AB audio amplifier that utilizes a bridge-tied load (BTL) configuration. It amplifies the audio signal received at the input pins and delivers it to the output pin with minimal distortion and noise. The amplifier operates within a specified voltage range and provides protection against short-circuits and thermal issues.

Detailed Application Field Plans

The LM4990MM/NOPB is commonly used in portable electronic devices where high-quality audio amplification is required. Some potential application fields include:

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

Detailed and Complete Alternative Models

  • TPA3116D2: High-power audio amplifier with integrated digital-to-analog converter (DAC)
  • MAX98357A: Low-power audio amplifier with I2S interface
  • TDA7498E: Dual-channel audio amplifier with high output power

These alternative models offer different features and specifications, providing options for various audio amplification requirements.

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قم بإدراج 10 أسئلة وإجابات شائعة تتعلق بتطبيق LM4990MM/NOPB في الحلول التقنية

  1. Question: What is the input voltage range for LM4990MM/NOPB?
    Answer: The input voltage range for LM4990MM/NOPB is typically 2.7V to 5.5V.

  2. Question: What is the maximum output current of LM4990MM/NOPB?
    Answer: The maximum output current of LM4990MM/NOPB is 1.25A.

  3. Question: Can LM4990MM/NOPB be used in battery-powered applications?
    Answer: Yes, LM4990MM/NOPB is suitable for battery-powered applications due to its low quiescent current.

  4. Question: Does LM4990MM/NOPB require external compensation?
    Answer: No, LM4990MM/NOPB does not require external compensation.

  5. Question: What is the typical efficiency of LM4990MM/NOPB?
    Answer: The typical efficiency of LM4990MM/NOPB is around 85%.

  6. Question: Is LM4990MM/NOPB suitable for audio amplifier applications?
    Answer: Yes, LM4990MM/NOPB is designed for audio amplifier applications and offers high-quality sound reproduction.

  7. Question: Can LM4990MM/NOPB operate in a wide temperature range?
    Answer: Yes, LM4990MM/NOPB can operate in a wide temperature range, typically from -40°C to 125°C.

  8. Question: What is the shutdown current of LM4990MM/NOPB?
    Answer: The shutdown current of LM4990MM/NOPB is typically 0.01µA.

  9. Question: Does LM4990MM/NOPB have built-in thermal shutdown protection?
    Answer: Yes, LM4990MM/NOPB features built-in thermal shutdown protection to prevent overheating.

  10. Question: Can LM4990MM/NOPB be used in portable electronic devices?
    Answer: Yes, LM4990MM/NOPB is suitable for use in portable electronic devices due to its low power consumption and small form factor.