National’s PowerWise LED drivers such as the LM34xx/LM340x/LM35xx families offer a maximum power-to-performance ratio, which means you get more features than standard incandescent and fluorescent lighting solutions at a fraction of the wattage. Using National’s PowerWise LED drivers, results in energy-efficient solutions that reduce power consumption.
The LM3401 is a switching controller designed to provide constant current to high power LEDs. The LM3401 drives an external P-MOSFET switch for step-down (Buck) regulators. The LM3401 delivers constant current within ±6% accuracy to a wide variety and number of series connected LEDs. Output current is adjusted with an external current sensing resistor to drive high power LEDs in excess of 1 A.
Key Features
- Hysteretic Control for Speed and Simplicity
- Input Operating Range of 4.5 V - 35 V
- 1.5 MHz maximum switching frequency
- Low 200 mV reference voltage
- Programmable current limit
- High speed CMOS compatible enable/dimming
- Adjustable hysteresis
- Input UVLO
- No output capacitor required
- MSOP-8 package
Applications
- LED Driver
- Battery Charger