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LM4819 from NS,National Semiconductor

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LM4819

Manufacturer: NS

350mW Audio Power Amplifier with Shutdown Mode

Partnumber Manufacturer Quantity Availability
LM4819 NS 100 In Stock

Description and Introduction

350mW Audio Power Amplifier with Shutdown Mode The LM4819 is a dual bridge-connected audio power amplifier manufactured by National Semiconductor (NS).  

### **Specifications:**  
- **Output Power:** 1.1W per channel into 8Ω at 5V  
- **Operating Voltage Range:** 2.7V to 5.5V  
- **Quiescent Current:** 3.6mA (typical)  
- **Shutdown Current:** 0.1μA (typical)  
- **THD+N (Total Harmonic Distortion + Noise):** 1% (typical) at 1kHz, 1W into 8Ω  
- **Gain:** Fixed at 6dB  
- **PSRR (Power Supply Rejection Ratio):** 60dB (typical)  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions:**  
- The LM4819 is designed for portable audio applications.  
- It features a low-power consumption shutdown mode.  
- The device includes thermal shutdown protection.  
- It is available in a space-saving 10-pin MSOP package.  

### **Features:**  
- Dual bridge-connected amplifier  
- Low shutdown current  
- No output coupling capacitors required  
- Improved PSRR at 217Hz  
- Internal thermal shutdown protection  
- Unity-gain stable  

The LM4819 is optimized for battery-powered applications such as mobile phones, portable media players, and other compact audio devices.

Application Scenarios & Design Considerations

350mW Audio Power Amplifier with Shutdown Mode

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