1.5A Constant Current Buck Regulator for Driving High Power LEDs 14-HTSSOP -40 to 125 The **LM3406HVMHX/NOPB** is a high-voltage LED driver manufactured by **National Semiconductor (NS)**.  

### **Key Specifications:**  
- **Input Voltage Range:** 6V to 42V  
- **Output Current:** Up to 1.5A  
- **Switching Frequency:** Adjustable (100kHz to 1MHz)  
- **Efficiency:** Up to 95%  
- **Dimming Control:** Analog/PWM  
- **Package:** 16-Pin HTSSOP (Exposed Pad)  

### **Descriptions:**  
The LM3406HVMHX/NOPB is a **buck (step-down) LED driver** designed for high-voltage applications. It provides constant current to drive high-power LEDs efficiently.  

### **Features:**  
- **Wide Input Voltage Range** (6V to 42V)  
- **Adjustable Output Current** (up to 1.5A)  
- **Integrated N-Channel MOSFET**  
- **Thermal Shutdown Protection**  
- **Cycle-by-Cycle Current Limiting**  
- **PWM & Analog Dimming Support**  
- **High Efficiency (up to 95%)**  

This device is commonly used in **LED lighting, automotive, and industrial applications**.

1.5A Constant Current Buck Regulator for Driving High Power LEDs 14-HTSSOP -40 to 125