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LM2796TL from NS,National Semiconductor

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LM2796TL

Manufacturer: NS

Dual-Display White LED Driver with 3/2x Switched Capacitor Boost

Partnumber Manufacturer Quantity Availability
LM2796TL NS 14500 In Stock

Description and Introduction

Dual-Display White LED Driver with 3/2x Switched Capacitor Boost The LM2796TL is a charge pump-based LED driver manufactured by National Semiconductor (NS). Below are its specifications, descriptions, and features based on factual information:

### **Specifications:**  
- **Manufacturer:** National Semiconductor (NS)  
- **Type:** Switched Capacitor (Charge Pump) LED Driver  
- **Input Voltage Range:** 2.7V to 5.5V  
- **Output Current:** Up to 30mA per channel (adjustable)  
- **Number of Channels:** 3  
- **Switching Frequency:** ~1MHz (typical)  
- **Efficiency:** Up to 90% (depending on conditions)  
- **Package:** Thin SOT-23-6 (LM2796TL)  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions:**  
- The LM2796TL is a compact, high-efficiency LED driver designed for driving up to three white LEDs in parallel.  
- It uses a charge pump mechanism to regulate current, eliminating the need for an external inductor.  
- The device is optimized for battery-powered applications, such as mobile phones, PDAs, and portable electronics.  

### **Features:**  
- **No Inductor Required:** Uses a switched capacitor charge pump for simplicity.  
- **Adjustable Brightness:** Current can be controlled via an external resistor.  
- **Low Noise Operation:** Fixed-frequency switching reduces EMI.  
- **Automatic Soft-Start:** Limits inrush current during startup.  
- **Thermal Protection:** Prevents damage from overheating.  
- **Small Footprint:** SOT-23-6 package saves board space.  

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

Application Scenarios & Design Considerations

Dual-Display White LED Driver with 3/2x Switched Capacitor Boost
Partnumber Manufacturer Quantity Availability
LM2796TL NSC 200 In Stock

Description and Introduction

Dual-Display White LED Driver with 3/2x Switched Capacitor Boost The LM2796TL is a charge pump-based LED driver manufactured by National Semiconductor (NSC). Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 2.7V to 5.5V  
- **Output Current:** Up to 30mA per channel (adjustable)  
- **Number of Channels:** 3 (triple LED driver)  
- **Switching Frequency:** ~1MHz  
- **Efficiency:** Up to 90%  
- **Package:** 10-pin LLP (Leadless Leadframe Package)  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions:**  
- The LM2796TL is a high-efficiency, fixed-frequency charge pump designed to drive three white LEDs with constant current.  
- It eliminates the need for inductors, using capacitors instead for voltage conversion.  
- The device includes an internal current regulator to ensure uniform brightness across LEDs.  
- It supports dimming via PWM (Pulse Width Modulation) control.  

### **Features:**  
- **No Inductors Required:** Uses external capacitors for voltage conversion.  
- **Automatic Mode Switching:** Switches between 1x and 1.5x modes for optimal efficiency.  
- **Low Dropout Operation:** Maintains regulation even with low input voltage.  
- **Independent LED Current Control:** Each channel can be individually adjusted.  
- **Thermal Shutdown Protection:** Prevents overheating.  
- **Small Footprint:** Compact 10-pin LLP package suitable for space-constrained applications.  

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

Application Scenarios & Design Considerations

Dual-Display White LED Driver with 3/2x Switched Capacitor Boost

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