LM4868LQ

Product Overview

Category: Audio Amplifier
Use: The LM4868LQ is a stereo audio amplifier designed for portable electronic devices.
Characteristics: It features low power consumption, small package size, and high efficiency. The essence of the LM4868LQ lies in its ability to deliver high-quality audio output while operating on minimal power.
Package: The LM4868LQ comes in a small outline integrated circuit (SOIC) package.
Packaging/Quantity: Typically packaged in reels with quantities varying based on manufacturer specifications.

Specifications

• Power Supply Voltage: 2.0V to 5.5V
• Output Power: 1.1W per channel into 8Ω at 5V
• Total Harmonic Distortion + Noise (THD+N): 0.15% (typical) at 1kHz, 5V, 150mW, 8Ω
• Shutdown Current: 0.6μA (typical)
• Shutdown Pin Selectable Gain:
  • 6dB or 12dB

Detailed Pin Configuration

The LM4868LQ has a total of 16 pins, with each pin serving a specific function. The detailed pin configuration is as follows:

| Pin Number | Pin Name | Function | |------------|----------|----------| | 1 | SHDN | Shutdown control input | | 2 | GAIN | Gain select input | | 3 | IN- | Negative input | | 4 | IN+ | Positive input | | 5 | VDD | Power supply voltage | | 6 | OUTL | Left channel output | | 7 | GND | Ground | | 8 | OUTR | Right channel output |

...and so on for the remaining pins.

Functional Features

• Low Quiescent Power Consumption
• Shutdown Control Input for Power Savings
• Thermal Shutdown Protection
• Short-Circuit and Thermal Overload Protection

Advantages and Disadvantages

Advantages: - Low power consumption - Small package size - High efficiency - Shutdown control for power savings

Disadvantages: - Limited output power compared to larger amplifiers - Limited input voltage range

Working Principles

The LM4868LQ operates by amplifying the input audio signal and delivering it to the connected speakers. It utilizes a low quiescent current architecture to minimize power consumption while providing high-quality audio output.

Detailed Application Field Plans

The LM4868LQ is well-suited for various portable electronic devices such as smartphones, tablets, portable speakers, and handheld gaming consoles. Its low power consumption and small package size make it ideal for applications where space and battery life are critical factors.

Detailed and Complete Alternative Models

• LM4869: Similar characteristics with higher output power
• LM4871: Higher output power and wider input voltage range
• LM4881: Higher efficiency and lower THD+N

In conclusion, the LM4868LQ is a versatile audio amplifier suitable for portable electronic devices, offering a balance of power efficiency and audio performance.

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