LM48512TL/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: Thin Shrink Small Outline Package (TSSOP)

Essence: The LM48512TL/NOPB is a high-efficiency audio power amplifier IC designed for portable devices such as smartphones, tablets, and portable media players.

Packaging/Quantity: The LM48512TL/NOPB is available in tape and reel packaging with 2500 units per reel.

Specifications

• Supply Voltage Range: 2.5V to 5.5V
• Output Power: Up to 1.4W per channel into 8Ω load at 5V supply
• Efficiency: Up to 90%
• Quiescent Current: 1.6mA (typical)
• Shutdown Current: 0.01μA (typical)
• Total Harmonic Distortion + Noise (THD+N): 0.03% (typical) at 1kHz, 1.2W, 8Ω load
• Signal-to-Noise Ratio (SNR): 100dB (typical) at 1kHz, 1.2W, 8Ω load

Detailed Pin Configuration

The LM48512TL/NOPB has a total of 20 pins arranged as follows:

1. VDD - Power supply voltage
2. GND - Ground
3. SD - Shutdown control input
4. INL- - Left channel differential input
5. INL+ - Left channel differential input
6. BYP - Bypass capacitor connection
7. OUTL - Left channel output
8. PVDD - Power supply voltage for the output stage
9. VDD - Power supply voltage
10. GND - Ground
11. SD - Shutdown control input
12. INR- - Right channel differential input
13. INR+ - Right channel differential input
14. BYP - Bypass capacitor connection
15. OUTR - Right channel output
16. PVDD - Power supply voltage for the output stage
17. NC - No connection
18. NC - No connection
19. NC - No connection
20. NC - No connection

Functional Features

1. High Efficiency: The LM48512TL/NOPB utilizes a high-efficiency Class D amplifier architecture, ensuring minimal power wastage and longer battery life in portable devices.
2. Low Quiescent Current: With a low quiescent current of 1.6mA, the IC minimizes power consumption during idle periods, further enhancing battery life.
3. Thermal Shutdown Protection: The device incorporates thermal shutdown protection to prevent damage due to excessive heat.
4. Short-Circuit and Over-Temperature Protection: The IC features built-in short-circuit and over-temperature protection mechanisms, safeguarding the device and connected components from potential damage.

Advantages and Disadvantages

Advantages: - High efficiency leads to longer battery life - Low quiescent current reduces power consumption - Thermal shutdown protection prevents overheating - Built-in short-circuit and over-temperature protection ensure device safety

Disadvantages: - Limited output power compared to larger audio amplifiers - May require additional external components for optimal performance

Working Principles

The LM48512TL/NOPB operates on the principle of Class D amplification. It uses pulse-width modulation (PWM) to convert the incoming audio signal into a series of high-frequency pulses. These pulses are then amplified and filtered to reconstruct the original audio waveform. The high efficiency of Class D amplifiers is achieved by rapidly switching the output stage between fully on and fully off states, minimizing power dissipation.

Detailed Application Field Plans

The LM48512TL/NOPB is suitable for various portable audio applications, including: - Smartphones - Tablets - Portable media players - Bluetooth speakers - Gaming devices - Wearable devices

Detailed and Complete Alternative Models

1. LM4863: Stereo 2.2W Audio Power Amplifier
2. TPA3110D2: 15-W Stereo Class-D Audio Power Amplifier
3. MAX98357A: Mono 3.2W Class D Amplifier with I2S Interface

These alternative models offer similar functionality and can be considered as alternatives to the LM48512TL/NOPB based on specific application requirements.

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