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LM4889 from NSC,National Semiconductor

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LM4889

Manufacturer: NSC

1 Watt Audio Power Amplifier

Partnumber Manufacturer Quantity Availability
LM4889 NSC 2000 In Stock

Description and Introduction

1 Watt Audio Power Amplifier The LM4889 is a dual audio power amplifier manufactured by National Semiconductor (NSC).  

### **Specifications:**  
- **Supply Voltage Range:** 2.7V to 5.5V  
- **Output Power:**  
  - 1.1W per channel into 8Ω at 5V (THD+N = 1%)  
  - 325mW per channel into 8Ω at 3.3V (THD+N = 1%)  
- **THD+N (Total Harmonic Distortion + Noise):** 0.2% (typical at 1kHz, 1W into 8Ω)  
- **Shutdown Current:** 0.01μA (typical)  
- **Operating Current:** 4mA (typical)  
- **PSRR (Power Supply Rejection Ratio):** 70dB (typical)  
- **Gain Bandwidth Product:** 3MHz (typical)  
- **Slew Rate:** 2V/μs (typical)  
- **Package Options:** 8-pin SOIC, 8-pin LLP  

### **Descriptions and Features:**  
- Dual-channel audio power amplifier designed for portable applications.  
- Capable of driving stereo speakers or headphones.  
- Features an internal depop circuit to reduce turn-on/off transients.  
- No output coupling capacitors required.  
- Unity-gain stable.  
- Thermal shutdown and short-circuit protection.  
- Space-saving package options.  

The LM4889 is optimized for low-voltage operation, making it suitable for battery-powered devices such as smartphones, portable media players, and laptops.

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