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LM49270SQ from NS,National Semiconductor

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LM49270SQ

Manufacturer: NS

Filterless 2.2W Stereo Class D Audio Subsystem with OCL Headphone Amplifier, 3D Enhancement, and Headphone Sense

Partnumber Manufacturer Quantity Availability
LM49270SQ NS 880 In Stock

Description and Introduction

Filterless 2.2W Stereo Class D Audio Subsystem with OCL Headphone Amplifier, 3D Enhancement, and Headphone Sense The LM49270SQ is a manufacturer part number from National Semiconductor (NS). Below are the factual specifications, descriptions, and features of the LM49270SQ:

### **Specifications:**
- **Manufacturer:** National Semiconductor (NS)  
- **Type:** Audio Amplifier IC  
- **Package:** WQFN (Wafer-Level Chip-Scale Package)  
- **Channels:** 2 (Stereo)  
- **Output Type:** Class D  
- **Output Power:** Up to 1.1W per channel (into 8Ω at 5V)  
- **Supply Voltage Range:** 2.7V to 5.5V  
- **Total Harmonic Distortion + Noise (THD+N):** Low distortion performance  
- **Efficiency:** High efficiency due to Class D operation  
- **Shutdown Current:** Low power consumption in standby mode  

### **Descriptions:**
The LM49270SQ is a stereo Class D audio amplifier designed for portable applications. It provides high-quality audio output with low power consumption, making it suitable for battery-powered devices such as smartphones, tablets, and portable media players.

### **Features:**
- **Stereo Class D Amplifier:** Delivers efficient and high-fidelity audio output.  
- **Low Supply Voltage Operation:** Works efficiently from 2.7V to 5.5V.  
- **Low Quiescent Current:** Optimized for battery-powered applications.  
- **Pop & Click Suppression:** Minimizes audible noise during power-up and shutdown.  
- **Thermal & Short-Circuit Protection:** Built-in safeguards for reliability.  
- **Small Footprint:** WQFN package saves board space in compact designs.  

This information is based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

Filterless 2.2W Stereo Class D Audio Subsystem with OCL Headphone Amplifier, 3D Enhancement, and Headphone Sense
Partnumber Manufacturer Quantity Availability
LM49270SQ NSC 708 In Stock

Description and Introduction

Filterless 2.2W Stereo Class D Audio Subsystem with OCL Headphone Amplifier, 3D Enhancement, and Headphone Sense The LM49270SQ is a stereo audio power amplifier manufactured by National Semiconductor (NSC). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Type:** Stereo Audio Power Amplifier  
- **Output Power:**  
  - 1.1W per channel into 8Ω at 5V (THD+N = 1%)  
  - 700mW per channel into 16Ω at 5V (THD+N = 1%)  
- **Supply Voltage Range:** 2.7V to 5.5V  
- **Total Harmonic Distortion + Noise (THD+N):** 0.1% (typical)  
- **Signal-to-Noise Ratio (SNR):** 100dB (typical)  
- **Shutdown Current:** 0.01μA (typical)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 16-pin LLP (Leadless Leadframe Package)  

### **Descriptions:**  
The LM49270SQ is a high-performance, low-power stereo audio amplifier designed for portable applications. It features a differential input architecture to reduce noise and an integrated depop circuit to eliminate turn-on/off transients.  

### **Features:**  
- **Efficiency:** Class AB operation with high efficiency  
- **Low Power Consumption:** Optimized for battery-powered devices  
- **Pop & Click Suppression:** Built-in circuitry to minimize audible noise during power-up/down  
- **Short-Circuit Protection:** Includes thermal shutdown and output short-circuit protection  
- **Differential Inputs:** Reduces common-mode noise  
- **Small Footprint:** Compact 16-pin LLP package for space-constrained designs  

This information is based on the manufacturer's datasheet.

Application Scenarios & Design Considerations

Filterless 2.2W Stereo Class D Audio Subsystem with OCL Headphone Amplifier, 3D Enhancement, and Headphone Sense

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