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LM3402HVMR from NS,National Semiconductor

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LM3402HVMR

Manufacturer: NS

LM3402/LM3402HV 0.5A Constant Current Buck Regulator for Driving High Power LEDs

Partnumber Manufacturer Quantity Availability
LM3402HVMR NS 30000 In Stock

Description and Introduction

LM3402/LM3402HV 0.5A Constant Current Buck Regulator for Driving High Power LEDs The LM3402HVMR is a high-voltage step-down switching regulator manufactured by Texas Instruments (formerly National Semiconductor, NS).  

### **Specifications:**  
- **Input Voltage Range:** 6V to 75V  
- **Output Voltage Range:** Adjustable down to 1.225V  
- **Output Current:** Up to 500mA  
- **Switching Frequency:** Adjustable up to 1MHz  
- **Efficiency:** Up to 95%  
- **Package:** 8-Pin SOIC (MR)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Features:**  
  - Wide input voltage range  
  - Adjustable output voltage  
  - Internal N-channel MOSFET switch  
  - Cycle-by-cycle current limiting  
  - Thermal shutdown protection  
  - Adjustable soft-start  

### **Descriptions and Features:**  
The LM3402HVMR is a high-voltage buck regulator designed for step-down DC-DC conversion. It integrates a high-side N-channel MOSFET, reducing external component count. The device supports a wide input voltage range, making it suitable for industrial, automotive, and telecom applications.  

Key features include:  
- **Adjustable Output:** Uses an external resistor divider to set output voltage.  
- **High Efficiency:** Minimizes power loss with synchronous rectification.  
- **Protection Features:** Includes thermal shutdown and current limiting.  
- **Compact Design:** Small footprint with minimal external components.  

This regulator is commonly used in LED drivers, power supplies, and battery-powered systems requiring high input voltage tolerance.

Application Scenarios & Design Considerations

LM3402/LM3402HV 0.5A Constant Current Buck Regulator for Driving High Power LEDs

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