LM48511SQX/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Power Amplifier

Characteristics: - High efficiency - Low quiescent current - Wide supply voltage range - Thermal shutdown protection - Short-circuit and over-temperature protection

Package: 20-WQFN (4x4)

Essence: The LM48511SQX/NOPB is a high-performance audio power amplifier IC designed for portable devices such as smartphones, tablets, and portable media players.

Packaging/Quantity: The LM48511SQX/NOPB is available in tape and reel packaging with a quantity of 2500 units per reel.

Specifications

• Supply Voltage Range: 2.5V to 5.5V
• Output Power: Up to 1.8W per channel into 4Ω load at 5V supply
• Efficiency: Up to 90%
• Quiescent Current: 3.5mA (typical)
• Shutdown Current: <1µA
• Total Harmonic Distortion + Noise (THD+N): 0.03% (typical)
• Signal-to-Noise Ratio (SNR): 100dB (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM48511SQX/NOPB has a 20-pin WQFN package with the following pin configuration:

1. VDD
2. GND
3. SDZ
4. SDA
5. SCL
6. SHUTDOWN
7. MODE
8. INL-
9. INL+
10. BYPASS
11. OUTL
12. OUTR
13. INR+
14. INR-
15. VDD
16. GND
17. VDD
18. GND
19. VDD
20. GND

Functional Features

• High-efficiency Class D amplifier architecture
• Integrated boost converter for efficient power delivery
• I2C control interface for flexible configuration
• Pop and click suppression circuitry for smooth audio transitions
• Thermal shutdown protection to prevent overheating
• Short-circuit and over-temperature protection for enhanced safety

Advantages and Disadvantages

Advantages: - High efficiency results in longer battery life for portable devices - Wide supply voltage range allows compatibility with various power sources - Thermal shutdown and protection features ensure safe operation - Small package size enables compact device designs

Disadvantages: - Limited output power compared to larger audio amplifiers - Requires external components for proper operation - Sensitive to electromagnetic interference (EMI)

Working Principles

The LM48511SQX/NOPB utilizes a Class D amplifier architecture, which efficiently converts the input audio signal into a high-frequency pulse-width modulated (PWM) signal. This PWM signal is then amplified by the integrated boost converter and filtered to produce the final audio output.

The I2C control interface allows for flexible configuration of various parameters such as gain, volume, and audio effects. The thermal shutdown, short-circuit, and over-temperature protection mechanisms ensure safe operation and prevent damage to the IC and connected devices.

Detailed Application Field Plans

The LM48511SQX/NOPB is suitable for a wide range of portable audio applications, including: - Smartphones - Tablets - Portable media players - Bluetooth speakers - Gaming devices - Wearable devices

Detailed and Complete Alternative Models

1. LM4863SQX/NOPB
2. LM4890SQX/NOPB
3. LM4889SQX/NOPB
4. LM4950SQX/NOPB
5. LM4970SQX/NOPB

These alternative models offer similar functionality and performance characteristics to the LM48511SQX/NOPB and can be considered as alternatives based on specific application requirements.

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