LM27951 Overview
The LM27951 is a switched capacitor white-LED driver capable of driving up to four LEDs with 30 mA through each LED. Its four tightly regulated current sources ensure excellent LED current and brightness matching. LED drive current is programmed by an external sense resistor.
LM27951 Key Features
- 1 Input Voltage Range: 2.8 V to 5.5 V
- Drives up to Four LEDs With up to 30 mA each
- Regulated Current Sources with 0.2% (Typical)
- 3/2×, 1× Gain Transition Based on LED Vƒ
- Peak Efficiency Over 85%
- PWM Brightness Control
- Very Small Solution Size
- No Inductor
- Fixed 750-kHz Switching Frequency
- < 1-µA Shutdown Current
