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LM4879MM from NSC,National Semiconductor

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LM4879MM

Manufacturer: NSC

1.1 Watt Audio Power Amplifier

Partnumber Manufacturer Quantity Availability
LM4879MM NSC 10000 In Stock

Description and Introduction

1.1 Watt Audio Power Amplifier The LM4879MM is a 3W audio power amplifier manufactured by National Semiconductor (NSC).  

### **Specifications:**  
- **Output Power:** 3W (into 4Ω at 5V)  
- **Supply Voltage Range:** 2.7V to 5.5V  
- **Quiescent Current:** 4mA (typical)  
- **Shutdown Current:** 0.6μA (typical)  
- **THD+N (Total Harmonic Distortion + Noise):** 0.3% (typical at 1kHz, 1W into 4Ω)  
- **PSRR (Power Supply Rejection Ratio):** 70dB (typical at 217Hz)  
- **Package:** 8-pin VSSOP (MM)  

### **Descriptions:**  
- The LM4879MM is a mono, bridge-tied load (BTL) audio amplifier designed for portable applications.  
- It features a low-power consumption shutdown mode and requires minimal external components.  
- It is optimized for driving speakers with high efficiency and low distortion.  

### **Features:**  
- **Bridge-Tied Load (BTL) Output:** Eliminates the need for an output coupling capacitor.  
- **Low Quiescent Current:** Extends battery life in portable devices.  
- **Thermal Shutdown Protection:** Prevents damage from overheating.  
- **Improved PSRR:** Reduces noise from power supply variations.  
- **Space-Saving Package:** 8-pin VSSOP (MM) for compact designs.  

This information is based on the manufacturer's datasheet.

Application Scenarios & Design Considerations

1.1 Watt Audio Power Amplifier
Partnumber Manufacturer Quantity Availability
LM4879MM NS 3523 In Stock

Description and Introduction

1.1 Watt Audio Power Amplifier The LM4879MM is a mono bridged audio power amplifier manufactured by National Semiconductor (NS).  

**Specifications:**  
- **Output Power:** 2.8W (into 4Ω at 5V)  
- **Supply Voltage Range:** 2.7V to 5.5V  
- **THD+N (Total Harmonic Distortion + Noise):** 1% (typical at 1kHz, 1.4W into 3Ω)  
- **Shutdown Current:** 0.01μA (typical)  
- **Operating Current:** 3mA (typical)  
- **Gain:** Fixed at 6dB  
- **Package:** 8-pin VSSOP (MM)  

**Descriptions and Features:**  
- Designed for battery-powered applications  
- Bridge-tied load (BTL) configuration eliminates the need for external coupling capacitors  
- Improved pop-and-click suppression  
- Unity-gain stable  
- Thermal shutdown protection  
- Short-circuit protection  
- Space-saving VSSOP package  

This amplifier is commonly used in portable audio devices such as mobile phones, PDAs, and portable media players.

Application Scenarios & Design Considerations

1.1 Watt Audio Power Amplifier

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