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LM4856ITL/NOPB
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LM4856ITL/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Amplifier

Characteristics: - High-performance audio amplifier - Low power consumption - Small form factor - Suitable for portable electronic devices

Package: Thin Shrink Small Outline Package (TSSOP)

Essence: The LM4856ITL/NOPB is a high-performance audio amplifier IC designed for use in portable electronic devices. It provides amplification and improved sound quality for audio signals.

Packaging/Quantity: The LM4856ITL/NOPB is typically sold in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

  • Supply Voltage: 2.7V to 5.5V
  • Output Power: 1.3W per channel (8Ω load, 5V supply)
  • Total Harmonic Distortion + Noise (THD+N): 0.1% (1kHz, 1.3W output power)
  • Shutdown Current: 0.01μA (typical)
  • Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4856ITL/NOPB has a total of 20 pins. Here is the detailed pin configuration:

  1. VDD: Positive power supply
  2. GND: Ground
  3. SD: Shutdown control input
  4. IN1N: Negative input for Channel 1
  5. IN1P: Positive input for Channel 1
  6. BYP: Bypass capacitor connection
  7. OUT1P: Positive output for Channel 1
  8. OUT1N: Negative output for Channel 1
  9. PVDD: Positive power supply for headphone amplifier
  10. PGND: Ground for headphone amplifier
  11. HPL: Left headphone output
  12. HPR: Right headphone output
  13. IN2P: Positive input for Channel 2
  14. IN2N: Negative input for Channel 2
  15. OUT2N: Negative output for Channel 2
  16. OUT2P: Positive output for Channel 2
  17. VDDC: Positive power supply for charge pump
  18. CP1: Charge pump flying capacitor connection
  19. CP2: Charge pump flying capacitor connection
  20. GND: Ground

Functional Features

  • Dual-channel audio amplification
  • Low quiescent current
  • Thermal shutdown protection
  • Short-circuit and over-temperature protection
  • Pop and click suppression during power-up and shutdown

Advantages and Disadvantages

Advantages: - High-performance audio amplification - Low power consumption - Small form factor - Built-in protection features

Disadvantages: - Limited output power compared to larger audio amplifiers - May require additional external components for optimal performance

Working Principles

The LM4856ITL/NOPB operates by receiving audio input signals through the IN1P and IN1N pins for Channel 1, and IN2P and IN2N pins for Channel 2. It amplifies these signals and outputs them through the respective OUT1P/OUT1N and OUT2P/OUT2N pins.

The IC also includes a charge pump circuit that provides the necessary voltage levels for the headphone amplifier section (HPL and HPR pins). The BYP pin is used to connect an external bypass capacitor for improved stability and noise reduction.

Detailed Application Field Plans

The LM4856ITL/NOPB is commonly used in various portable electronic devices, including: - Mobile phones - Tablets - Portable media players - Bluetooth speakers - Gaming consoles

Its small form factor, low power consumption, and high-performance audio amplification make it ideal for these applications.

Detailed and Complete Alternative Models

  • LM4857ITL/NOPB
  • LM4861MT/NOPB
  • LM4863MT/NOPB
  • LM4865MT/NOPB
  • LM4867MT/NOPB

These alternative models offer similar functionality and characteristics to the LM4856ITL/NOPB and can be considered as alternatives based on specific requirements and application needs.

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Lista 10 Vanliga frågor och svar relaterade till tillämpningen av LM4856ITL/NOPB i tekniska lösningar

  1. Q: What is the maximum output power of LM4856ITL/NOPB? A: The maximum output power of LM4856ITL/NOPB is 1.1W per channel into an 8Ω load.

  2. Q: What is the supply voltage range for LM4856ITL/NOPB? A: The supply voltage range for LM4856ITL/NOPB is 2.7V to 5.5V.

  3. Q: Can LM4856ITL/NOPB be used in portable devices? A: Yes, LM4856ITL/NOPB is suitable for use in portable devices due to its low power consumption and small footprint.

  4. Q: Does LM4856ITL/NOPB require external coupling capacitors? A: No, LM4856ITL/NOPB does not require external coupling capacitors, which simplifies the design.

  5. Q: What is the typical shutdown current of LM4856ITL/NOPB? A: The typical shutdown current of LM4856ITL/NOPB is 0.6μA.

  6. Q: Is LM4856ITL/NOPB suitable for driving headphones? A: Yes, LM4856ITL/NOPB is designed for driving headphones and can deliver high-quality audio output.

  7. Q: Can LM4856ITL/NOPB be used in stereo applications? A: Yes, LM4856ITL/NOPB is a stereo audio amplifier and can be used in stereo applications.

  8. Q: What is the typical total harmonic distortion (THD) of LM4856ITL/NOPB? A: The typical THD of LM4856ITL/NOPB is 0.1% at 1kHz and 10% of the maximum output power.

  9. Q: Does LM4856ITL/NOPB have built-in thermal shutdown protection? A: Yes, LM4856ITL/NOPB features built-in thermal shutdown protection to prevent overheating.

  10. Q: What is the package type of LM4856ITL/NOPB? A: LM4856ITL/NOPB is available in a small 14-pin TSSOP package for easy integration into designs.