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LM391N-100

LM391 Audio Power Driver

Partnumber Manufacturer Quantity Availability
LM391N-100,LM391N100 74 In Stock

Description and Introduction

LM391 Audio Power Driver The LM391N-100 is a monolithic integrated circuit from Texas Instruments that functions as a dot/bar display driver. Below are its specifications, descriptions, and features based on Ic-phoenix technical data files:  

### **Specifications:**  
- **Type:** LED Driver (Dot/Bar Display)  
- **Supply Voltage Range:** 3V to 25V  
- **Output Current (per segment):** 10mA to 30mA (adjustable)  
- **Reference Voltage Range:** Adjustable (1.2V to 12V)  
- **Number of Outputs:** 10 (for 10-segment LED display)  
- **Operating Temperature Range:** 0°C to +70°C  
- **Package:** 18-Pin DIP (Dual In-line Package)  

### **Descriptions:**  
- The LM391N-100 is designed to drive 10 LEDs in either a **dot mode** (single LED lit) or **bar mode** (multiple LEDs lit in progression).  
- It includes an internal voltage reference and adjustable scaling for different input ranges.  
- The device is commonly used in **VU meters, battery level indicators, and analog signal displays**.  

### **Features:**  
- **Linear LED Drive:** Provides accurate logarithmic or linear display scaling.  
- **Adjustable Brightness:** Controls LED current via an external resistor.  
- **Low Standby Current:** Typically 6mA (excluding LED current).  
- **Wide Supply Voltage Range:** Supports 3V to 25V operation.  
- **No Multiplexing Required:** Each LED is driven independently.  
- **Internal Voltage Reference:** Eliminates the need for an external reference in many applications.  

For detailed electrical characteristics, refer to the official Texas Instruments datasheet.

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