Overview
The LM4675SD/NOPB is a Class-D audio power amplifier manufactured by Texas Instruments. Designed for compact and efficient audio applications, this model is part of the Boomer® and PowerWise® series, offering high performance in a small form factor. It is ideal for portable devices, consumer electronics, and other applications requiring low power consumption and high-quality audio output. The LM4675SD/NOPB is particularly noted for its ultra-low EMI, filterless design, and integrated features such as differential inputs, PWM, and thermal protection.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Output Power | 2.7 | W | @ 4 Ohm |
| THD + Noise | 0.02 | % | |
| Supply Voltage (Max) | 5.5 | V | |
| Supply Voltage (Min) | 2.4 | V | |
| Operating Temperature (Max) | +85 | °C | |
| Operating Temperature (Min) | -40 | °C | |
| Package | 8-LLP-EP (3x3) | Surface Mount | |
| Load Impedance | 8 | Ohm | |
| CMRR | 80 | dB | |
| PSRR | 82 | dB | |
| Input Type | Differential | ||
| Output Type | 1-Channel Mono |
Key Features
- Ultra-low EMI design for noise-sensitive applications.
- Filterless architecture reduces external component count.
- Integrated differential inputs for improved signal integrity.
- PWM modulation for efficient power conversion.
- Short-circuit and thermal protection for enhanced reliability.
- Compact 8-LLP-EP (3x3) package for space-constrained designs.
Applications
The LM4675SD/NOPB is widely used in portable audio devices, such as smartphones, tablets, and Bluetooth speakers, where high efficiency and compact size are critical. It is also suitable for consumer electronics like gaming consoles and smart home devices. Additionally, its robust design makes it a reliable choice for automotive audio systems and industrial applications requiring durable and efficient audio amplification.
Q & A
1. What is the output power of the LM4675SD/NOPB?
The LM4675SD/NOPB delivers up to 2.7W of output power at a 4 Ohm load.
2. What is the operating voltage range?
The amplifier operates within a supply voltage range of 2.4V to 5.5V.
3. Does it support differential inputs?
Yes, the LM4675SD/NOPB features differential inputs for improved noise rejection.
4. What protection features are included?
It includes short-circuit and thermal protection to ensure safe operation.
5. What is the package type?
The device is available in an 8-LLP-EP (3x3) surface-mount package.
6. Is it suitable for portable devices?
Yes, its compact size and low power consumption make it ideal for portable applications.
7. What is the THD + Noise specification?
The total harmonic distortion plus noise is 0.02%.
8. Does it require external filtering?
No, the LM4675SD/NOPB features a filterless design, reducing external component requirements.
9. What is the CMRR of this amplifier?
The common-mode rejection ratio (CMRR) is 80 dB.
10. Can it operate in automotive environments?
Yes, its robust design and protection features make it suitable for automotive audio systems.
