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LM4842MH from NS,National Semiconductor

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LM4842MH

Manufacturer: NS

Stereo 2W Amplifiers with DC Volume Control, Transient-Free Outputs, and Cap-less Headphone Drive

Partnumber Manufacturer Quantity Availability
LM4842MH NS 1813 In Stock

Description and Introduction

Stereo 2W Amplifiers with DC Volume Control, Transient-Free Outputs, and Cap-less Headphone Drive The LM4842MH is a dual bridge-connected audio power amplifier manufactured by National Semiconductor (NS). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**  
- **Supply Voltage Range:** 2.7V to 5.5V  
- **Output Power:**  
  - 1.1W per channel into 8Ω at 5V (THD+N = 10%)  
  - 325mW per channel into 8Ω at 3V (THD+N = 10%)  
- **THD+N (Total Harmonic Distortion + Noise):** 0.2% (typical at 1kHz, 1W into 8Ω)  
- **Shutdown Current:** 0.1μA (typical)  
- **Operating Current:** 4mA (typical)  
- **Gain:** Fixed at 6dB  
- **Signal-to-Noise Ratio (SNR):** 90dB (typical)  
- **Package:** 28-pin LLP (Leadless Leadframe Package)  

### **Descriptions:**  
The LM4842MH is a dual bridge-connected audio power amplifier designed for portable applications such as mobile phones, PDAs, and portable media players. It operates from a single supply voltage and provides high-quality audio output with low power consumption. The device includes thermal shutdown and click-and-pop suppression circuitry.  

### **Features:**  
- **Dual Bridge Configuration:** Supports stereo or mono BTL (Bridge-Tied Load) operation.  
- **Low Power Consumption:** Optimized for battery-powered devices.  
- **Thermal Shutdown Protection:** Prevents damage due to overheating.  
- **Click-and-Pop Suppression:** Minimizes audible noise during power-up and shutdown.  
- **Short-Circuit Protection:** Safeguards against output shorts.  
- **Space-Saving Package:** 28-pin LLP for compact PCB designs.  

This information is based solely on the manufacturer's datasheet for the LM4842MH.

Application Scenarios & Design Considerations

Stereo 2W Amplifiers with DC Volume Control, Transient-Free Outputs, and Cap-less Headphone Drive

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