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LM3423MH from NS,National Semiconductor

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LM3423MH

Manufacturer: NS

N-Channel Controllers for Constant Current LED Drivers

Partnumber Manufacturer Quantity Availability
LM3423MH NS 10000 In Stock

Description and Introduction

N-Channel Controllers for Constant Current LED Drivers The LM3423MH is a high-voltage N-channel MOSFET controller manufactured by Texas Instruments (NS). Below are its specifications, descriptions, and features:

### **Specifications:**
- **Input Voltage Range:** 4.5V to 75V  
- **Output Voltage:** Adjustable via external components  
- **Switching Frequency:** Adjustable (up to 1MHz)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** 20-Pin TSSOP (MH)  

### **Descriptions:**
The LM3423MH is designed for driving N-channel MOSFETs in high-voltage applications such as LED drivers, DC-DC converters, and power management systems. It provides precise current regulation and supports both buck and boost topologies.

### **Features:**
- **Wide Input Voltage Range:** Supports 4.5V to 75V operation.  
- **Adjustable Switching Frequency:** Allows optimization for efficiency and component size.  
- **Precision Current Regulation:** Ensures stable output for LED driving.  
- **Integrated MOSFET Gate Driver:** Simplifies external circuitry.  
- **Thermal Shutdown Protection:** Prevents overheating damage.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation under low-voltage conditions.  

This device is suitable for industrial, automotive, and general-purpose power applications.

Application Scenarios & Design Considerations

N-Channel Controllers for Constant Current LED Drivers

Alternative Part Number

  • TPS40210DGQR --: Wide-input boost/LED controller with integrated gate driver, functionally similar to the LM3423 and available from TI, the current owner of National Semiconductor's power portfolio.
  • LT3757EMSE --: Versatile boost/SEPIC/flyback LED controller with wide input range and external MOSFET drive, a common drop-in class alternative for LM3423 designs.
  • MAX16834ATP+ --: High-brightness LED driver controller with integrated dimming and protection features, suitable as a functional substitute in LED driver applications.

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