LM4890MX/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Audio amplifier
• Characteristics: Low voltage, mono Class AB amplifier
• Package: Surface Mount (SMD)
• Essence: Amplifies audio signals with low power consumption
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 2.7V to 5.5V
• Output Power: 1.1W into 8Ω at 5V
• Total Harmonic Distortion + Noise: 0.1% (typical) at 1kHz, 0.6W, 8Ω
• Shutdown Current: 0.01μA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4890MX/NOPB has a total of 8 pins:

1. VDD: Positive supply voltage
2. IN+: Non-inverting input
3. IN-: Inverting input
4. SHUTDOWN: Shutdown control input
5. GND: Ground
6. BYPASS: Bypass capacitor connection
7. OUT: Output pin
8. VSS: Negative supply voltage

Functional Features

• Low voltage operation allows for battery-powered applications
• Mono Class AB amplifier provides high-quality audio amplification
• Shutdown mode for power-saving when not in use
• Short-circuit and thermal protection for enhanced reliability
• Internal gain setting resistors simplify external component count

Advantages and Disadvantages

Advantages

• Low power consumption
• High-quality audio amplification
• Compact surface mount package
• Built-in protection features

Disadvantages

• Mono output only
• Limited output power compared to higher wattage amplifiers

Working Principles

The LM4890MX/NOPB is a low voltage mono Class AB audio amplifier. It operates by amplifying the input audio signal using internal gain setting resistors and delivering the amplified signal to the output pin. The amplifier can be controlled using the shutdown pin, allowing for power-saving when not in use. The device also incorporates short-circuit and thermal protection mechanisms to ensure reliable operation.

Detailed Application Field Plans

The LM4890MX/NOPB is suitable for various applications that require audio amplification in low voltage scenarios. Some potential application fields include:

1. Portable audio devices
2. Mobile phones and smartphones
3. Tablets and laptops
4. Bluetooth speakers
5. Gaming consoles
6. Personal digital assistants (PDAs)

Detailed and Complete Alternative Models

• LM4861: Stereo Class AB audio amplifier with similar specifications
• LM386: Low voltage audio power amplifier with adjustable gain
• TPA3118D2: Stereo Class D audio amplifier with higher output power

(Note: This list is not exhaustive and other alternative models may exist.)

In conclusion, the LM4890MX/NOPB is a low voltage mono Class AB audio amplifier IC. It offers high-quality audio amplification with low power consumption, making it suitable for various portable audio applications. While it has limitations such as mono output and limited output power, its compact package and built-in protection features make it a versatile choice for audio amplification needs.