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LM3445MM from NS,National Semiconductor

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LM3445MM

Manufacturer: NS

Triac Dimmable Offline LED Driver

Partnumber Manufacturer Quantity Availability
LM3445MM NS 78958 In Stock

Description and Introduction

Triac Dimmable Offline LED Driver The LM3445MM is a TRIAC dimmable offline LED driver controller manufactured by National Semiconductor (NS).  

### **Specifications:**  
- **Input Voltage Range:** 85V to 265V AC  
- **Output Voltage Range:** Adjustable (depends on external components)  
- **Dimming Control:** TRIAC dimmer compatible  
- **Switching Frequency:** Adjustable up to 1MHz  
- **Package:** 10-pin VSSOP (MM)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Features Phase-Cut Dimming Detection**  

### **Descriptions:**  
The LM3445MM is designed for driving high-brightness LEDs from an AC line voltage. It integrates a dimming interface for TRIAC-based phase-cut dimmers, ensuring smooth dimming performance. It uses a constant off-time (COT) control method for regulating LED current.  

### **Features:**  
- TRIAC dimmer compatibility  
- Constant off-time (COT) control  
- Adjustable switching frequency  
- Built-in dimmer detection circuit  
- Thermal shutdown protection  
- Open/short LED protection  

For detailed application circuits and additional parameters, refer to the official datasheet.

Application Scenarios & Design Considerations

Triac Dimmable Offline LED Driver

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