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LM4911MMX from NS,National Semiconductor

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LM4911MMX

Manufacturer: NS

LM4911 Stereo 40mW Low Noise Headphone Amplifier with Selectable Capacitive Coupled or OCL Output

Partnumber Manufacturer Quantity Availability
LM4911MMX NS 29119 In Stock

Description and Introduction

LM4911 Stereo 40mW Low Noise Headphone Amplifier with Selectable Capacitive Coupled or OCL Output The LM4911MMX is a mono bridged audio power amplifier manufactured by National Semiconductor (NS).  

### **Specifications:**  
- **Output Power:** 1.1W into 8Ω at 5V  
- **Supply Voltage Range:** 2.7V to 5.5V  
- **THD+N (Total Harmonic Distortion + Noise):** 1% (typical) at 1W into 8Ω  
- **Shutdown Current:** <1µA (typical)  
- **Quiescent Current:** 2.5mA (typical)  
- **Gain:** Fixed at 6dB  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-pin micro SMD (MSOP)  

### **Descriptions:**  
The LM4911MMX is designed for portable audio applications, providing high-quality audio output with minimal external components. It features a bridge-tied load (BTL) configuration, eliminating the need for an output coupling capacitor.  

### **Features:**  
- **BTL (Bridge-Tied Load) Output:** No output coupling capacitor required  
- **Low Shutdown Current:** Extends battery life  
- **Improved PSRR (Power Supply Rejection Ratio):** Reduces noise from power supply variations  
- **Thermal Shutdown Protection:** Prevents damage from overheating  
- **Short-Circuit Protection:** Protects the device from output shorts  
- **Space-Saving MSOP Package:** Ideal for compact designs  

This amplifier is commonly used in mobile phones, portable media players, and other battery-powered audio devices.

Application Scenarios & Design Considerations

LM4911 Stereo 40mW Low Noise Headphone Amplifier with Selectable Capacitive Coupled or OCL Output
Partnumber Manufacturer Quantity Availability
LM4911MMX NSC 6600 In Stock

Description and Introduction

LM4911 Stereo 40mW Low Noise Headphone Amplifier with Selectable Capacitive Coupled or OCL Output The LM4911MMX is a manufacturer NSC (National Semiconductor) audio amplifier IC. Here are its specifications, descriptions, and features:

### **Specifications:**  
- **Type:** Mono, 1.1W Class AB Audio Power Amplifier  
- **Supply Voltage (VDD):** 2.2V to 5.5V  
- **Output Power:**  
  - 1.1W into 8Ω at 5V (THD+N = 10%)  
  - 550mW into 8Ω at 3.3V (THD+N = 10%)  
- **THD+N (Total Harmonic Distortion + Noise):** 0.2% (typical)  
- **Shutdown Current:** 0.01μA (typical)  
- **Quiescent Current:** 2.5mA (typical)  
- **Gain:** Fixed at 6dB  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Pin μMAX (MMX)  

### **Descriptions:**  
The LM4911MMX is a mono, bridge-tied load (BTL) audio power amplifier designed for portable applications. It operates from a single supply voltage and delivers high-quality audio output with low distortion. The device includes a shutdown feature to minimize power consumption when not in use.  

### **Features:**  
- **High Output Power:** Up to 1.1W into 8Ω at 5V  
- **Low Quiescent Current:** 2.5mA (typical)  
- **Ultra-Low Shutdown Current:** 0.01μA (typical)  
- **No Output Coupling Capacitors Required**  
- **Thermal Shutdown Protection**  
- **Improved PSRR (Power Supply Rejection Ratio)**  
- **Space-Saving μMAX Package**  

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

Application Scenarios & Design Considerations

LM4911 Stereo 40mW Low Noise Headphone Amplifier with Selectable Capacitive Coupled or OCL Output

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