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LM3559TLX from NATIONAL,National Semiconductor

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LM3559TLX

Manufacturer: NATIONAL

LM3559 Synchronous Boost Flash Driver with Dual 900 mA High Side Current Sources (1.8A Total Flash Current)

Partnumber Manufacturer Quantity Availability
LM3559TLX NATIONAL 1027 In Stock

Description and Introduction

LM3559 Synchronous Boost Flash Driver with Dual 900 mA High Side Current Sources (1.8A Total Flash Current) The LM3559TLX is a high-efficiency, dual-mode charge pump LED driver manufactured by National Semiconductor (now part of Texas Instruments). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Input Voltage Range:** 2.7V to 5.5V  
- **Output Current:** Up to 400mA (adjustable)  
- **Efficiency:** Up to 90%  
- **Switching Frequency:** 1MHz (typical)  
- **Number of LEDs Driven:** 1 or 2 (configurable)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 10-pin LLP (3mm x 3mm)  

### **Descriptions:**
- The LM3559TLX is designed to drive high-brightness LEDs efficiently in portable applications.  
- It supports both 1x and 1.5x charge pump modes for optimal power efficiency.  
- Includes integrated current sinks with adjustable brightness control via PWM or analog dimming.  
- Features thermal shutdown and overvoltage protection for reliability.  

### **Features:**
- **Dual-Mode Charge Pump:** Automatically switches between 1x and 1.5x modes for efficiency.  
- **Programmable LED Current:** Adjustable via an external resistor.  
- **PWM and Analog Dimming:** Supports brightness control through PWM input or analog voltage.  
- **Low Dropout Operation:** Maintains regulation even with low input voltage.  
- **Thermal Shutdown Protection:** Prevents overheating.  
- **Small Footprint:** Compact 10-pin LLP package for space-constrained designs.  

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

Application Scenarios & Design Considerations

LM3559 Synchronous Boost Flash Driver with Dual 900 mA High Side Current Sources (1.8A Total Flash Current)
Partnumber Manufacturer Quantity Availability
LM3559TLX NS 20265 In Stock

Description and Introduction

LM3559 Synchronous Boost Flash Driver with Dual 900 mA High Side Current Sources (1.8A Total Flash Current) The LM3559TLX is a high-efficiency, dual-mode charge pump LED driver manufactured by National Semiconductor (NS).  

### **Specifications:**  
- **Input Voltage Range:** 2.7V to 5.5V  
- **Output Current:** Up to 400mA per LED (adjustable)  
- **Number of LED Channels:** 2  
- **Efficiency:** Up to 92% (depending on mode)  
- **Switching Frequency:** 1MHz (typical)  
- **Operating Modes:** 1x, 1.5x, and 2x charge pump modes  
- **Dimming Control:** PWM and analog dimming support  
- **Thermal Protection:** Yes  
- **Package:** 16-pin LLP (4mm x 4mm)  

### **Descriptions:**  
The LM3559TLX is designed to drive two high-brightness LEDs efficiently with minimal external components. It automatically switches between charge pump modes (1x, 1.5x, 2x) to optimize efficiency based on input voltage and LED forward voltage.  

### **Features:**  
- Automatic mode switching for optimal efficiency  
- Independent current control for each LED  
- Soft-start to reduce inrush current  
- Low shutdown current (<1µA)  
- Integrated current regulators  
- Overvoltage and thermal protection  

This information is based on the manufacturer's datasheet.

Application Scenarios & Design Considerations

LM3559 Synchronous Boost Flash Driver with Dual 900 mA High Side Current Sources (1.8A Total Flash Current)

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