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LM2796TL from NS,National Semiconductor

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LM2796TL

Manufacturer: NS, NSC

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

Partnumber Manufacturer Quantity Availability
LM2796TL NS, NSC 14700 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

Alternative Part Number

  • TPS61160DRVR --: Single-channel white LED boost driver in a small WSON package, functionally similar to the LM2796 charge-pump LED driver and widely available.
  • CAT3649HV4-T2 --: Quad-mode charge pump LED driver with similar current-source outputs and small package, suitable as a drop-in style replacement for display backlight driving.
  • MAX1576ETG+ --: Charge-pump white LED driver with multiple regulated current sinks, comparable function and package size to the LM2796 for LCD backlight applications.
  • CAT3616HV4-T2 --: Charge-pump based white LED driver with similar current-source outputs and small package, suitable as a drop-in functional replacement.
  • MAX1554ETA+T --: Compact step-up white LED driver with comparable output current and dimming control, usable as an alternative with minor layout changes.

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