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LM3543M-H from NS,National Semiconductor

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LM3543M-H

Manufacturer: NS

Triple Port USB Power Distribution Switch and Over-Current Protection

Partnumber Manufacturer Quantity Availability
LM3543M-H,LM3543MH NS 32126 In Stock

Description and Introduction

Triple Port USB Power Distribution Switch and Over-Current Protection The LM3543M-H is a high-performance LED driver manufactured by National Semiconductor (NS). Below are the factual details about its specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 4.5V to 30V  
- **Output Current:** Up to 1.5A (adjustable)  
- **Switching Frequency:** Adjustable from 100kHz to 1MHz  
- **Efficiency:** Up to 95%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** 10-Pin MSOP  

### **Descriptions:**  
The LM3543M-H is a synchronous buck LED driver designed for driving high-brightness LEDs with high efficiency. It integrates a high-side N-channel MOSFET and provides constant current regulation for LED strings. The device supports dimming control via PWM or analog voltage input.  

### **Features:**  
- **Integrated MOSFET:** Reduces external component count.  
- **Wide Input Voltage Range:** Supports operation from 4.5V to 30V.  
- **Adjustable Output Current:** Up to 1.5A for driving multiple LEDs.  
- **PWM and Analog Dimming:** Flexible brightness control options.  
- **Thermal Shutdown Protection:** Prevents overheating.  
- **Undervoltage Lockout (UVLO):** Ensures stable operation.  
- **High-Side Current Sensing:** Improves accuracy and efficiency.  

This information is based solely on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

Triple Port USB Power Distribution Switch and Over-Current Protection

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