LM4838GR

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Amplifier

Characteristics: - High-performance audio amplifier - Low power consumption - Small form factor - Wide voltage range operation

Package: 24-pin SSOP (Shrink Small Outline Package)

Essence: The LM4838GR is a high-performance audio amplifier IC designed for various audio applications.

Packaging/Quantity: The LM4838GR is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Output Power: 1.3W per channel into 8Ω load at 5V supply voltage
• Total Harmonic Distortion + Noise (THD+N): 0.1% at 1kHz, 1.2W output power
• Efficiency: 85% at 1kHz, 1.2W output power
• Shutdown Current: 0.01μA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4838GR has a 24-pin SSOP package with the following pin configuration:

1. SD (Shutdown)
2. INL- (Left Channel Input Negative)
3. INL+ (Left Channel Input Positive)
4. VDD (Positive Power Supply)
5. BYP (Bypass Capacitor Connection)
6. GND (Ground)
7. OUTL (Left Channel Output)
8. NC (No Connection)
9. NC (No Connection)
10. NC (No Connection)
11. NC (No Connection)
12. NC (No Connection)
13. NC (No Connection)
14. NC (No Connection)
15. NC (No Connection)
16. NC (No Connection)
17. NC (No Connection)
18. NC (No Connection)
19. OUTR (Right Channel Output)
20. INR+ (Right Channel Input Positive)
21. INR- (Right Channel Input Negative)
22. VDD (Positive Power Supply)
23. BYP (Bypass Capacitor Connection)
24. SD (Shutdown)

Functional Features

• High-quality audio amplification
• Low power consumption for extended battery life
• Wide voltage range operation for flexibility in various applications
• Shutdown mode for power-saving when not in use
• Bypass capacitor connection for improved audio performance

Advantages and Disadvantages

Advantages: - High-performance audio amplification - Small form factor for space-constrained designs - Wide voltage range operation allows for versatile applications - Low power consumption for energy efficiency

Disadvantages: - Limited output power compared to higher wattage amplifiers - Requires external components for proper functionality

Working Principles

The LM4838GR is a class AB audio amplifier that utilizes a bridge-tied load (BTL) configuration. It amplifies the input audio signal and drives the connected speakers or headphones with increased power and fidelity.

The amplifier operates by receiving an analog audio input signal, which is then amplified and delivered to the output channels. The LM4838GR incorporates various protection features to ensure safe operation and prevent damage to the IC and connected devices.

Detailed Application Field Plans

The LM4838GR is commonly used in the following applications:

1. Portable audio devices (e.g., smartphones, tablets, MP3 players)
2. Laptop and desktop computers
3. Gaming consoles
4. Home theater systems
5. Automotive audio systems
6. Personal audio devices (e.g., headphones, earphones)

Detailed and Complete Alternative Models

1. LM4863: 2.2W Audio Power Amplifier
2. LM386: Low Voltage Audio Power Amplifier
3. TPA3116D2: 50W Stereo Class D Audio Amplifier

These alternative models offer different power outputs, features, and package options to suit various audio amplification requirements.

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