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LM27964SQ-C/NOPB from NSC,National Semiconductor

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LM27964SQ-C/NOPB

Manufacturer: NSC

White LED Driver System with I2C Compatible Brightness Control 24-WQFN

Partnumber Manufacturer Quantity Availability
LM27964SQ-C/NOPB,LM27964SQCNOPB NSC 950 In Stock

Description and Introduction

White LED Driver System with I2C Compatible Brightness Control 24-WQFN The LM27964SQ-C/NOPB is a dual white LED charge pump with an integrated 1x/1.5x/2x charge pump and two independent current sinks. It is manufactured by National Semiconductor (NSC).  

### **Key Specifications:**  
- **Input Voltage Range:** 2.7V to 5.5V  
- **Output Current:** Up to 30mA per LED (adjustable)  
- **Efficiency:** Up to 90% (depending on mode)  
- **Charge Pump Modes:** 1x, 1.5x, 2x (automatic mode switching)  
- **Number of LEDs Supported:** 2 (independent control)  
- **Dimming Control:** PWM or analog  
- **Switching Frequency:** ~1MHz  
- **Package:** 10-pin LLP (3mm x 3mm)  
- **Operating Temperature Range:** -40°C to +85°C  

### **Features:**  
- Automatic charge pump mode selection for optimal efficiency  
- Independent current control for each LED  
- Low dropout operation in 1x mode  
- Soft-start to limit inrush current  
- Thermal shutdown protection  
- No external inductors required  

This device is designed for backlighting applications in portable electronics such as smartphones, PDAs, and LCD displays.

Application Scenarios & Design Considerations

White LED Driver System with I2C Compatible Brightness Control 24-WQFN

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