LM48901SQ/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Amplifier

Characteristics: - Small size - Low power consumption - High efficiency - Wide voltage range - Excellent audio quality

Package: QFN (Quad Flat No-leads)

Essence: The LM48901SQ/NOPB is a compact and efficient audio amplifier IC designed for various portable electronic devices.

Packaging/Quantity: Available in reels, with 2500 units per reel.

Specifications

• Supply Voltage Range: 2.5V to 5.5V
• Output Power: Up to 1.1W
• Efficiency: >90%
• Total Harmonic Distortion (THD): <0.1%
• Shutdown Current: <1µA
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The LM48901SQ/NOPB has a total of 16 pins, as follows:

1. VDD: Power supply input
2. GND: Ground
3. SD: Shutdown control input
4. INL+: Positive input for left channel
5. INL-: Negative input for left channel
6. BYP: Bypass capacitor connection
7. OUTL: Left channel audio output
8. PVDD: Power supply input for the headphone amplifier
9. PGND: Ground for the headphone amplifier
10. HPL: Left channel headphone output
11. HPR: Right channel headphone output
12. INR-: Negative input for right channel
13. INR+: Positive input for right channel
14. VDD: Power supply input
15. GND: Ground
16. OUTR: Right channel audio output

Functional Features

• Single-ended or differential input configuration
• Integrated headphone amplifier
• Thermal shutdown protection
• Short-circuit and overcurrent protection
• Pop and click suppression during power-up and shutdown

Advantages and Disadvantages

Advantages: - Small size allows for compact designs - Low power consumption extends battery life - High efficiency reduces heat dissipation - Wide voltage range enables compatibility with various power sources - Excellent audio quality enhances user experience

Disadvantages: - Limited output power compared to larger amplifiers - May require additional external components for specific applications

Working Principles

The LM48901SQ/NOPB is a class D audio amplifier that utilizes pulse-width modulation (PWM) to convert the input audio signal into a high-frequency square wave. This square wave is then filtered and amplified to produce the desired audio output. The integrated headphone amplifier provides a separate output for driving headphones.

Detailed Application Field Plans

The LM48901SQ/NOPB is commonly used in portable electronic devices such as smartphones, tablets, portable media players, and Bluetooth speakers. It can also be found in automotive audio systems, gaming consoles, and other small form factor audio applications.

Detailed and Complete Alternative Models

• LM4863: Dual 2.2W Audio Amplifier
• LM386: Low Voltage Audio Power Amplifier
• TPA3116D2: 50W Stereo Class D Audio Amplifier

These alternative models offer different power outputs, features, and package options, providing flexibility for various design requirements.

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