WD3139

WD3139 High Efficiency, 38V Step-Up White LED Driver WD3139 Http//:www.sh-willsemi.com Descriptions The WD3139 is a constant current, high efficiency LED driver. Internal MOSFET can drive up to 10 white LEDs in series with 1.2A current limit and 38V OVP. A Pulse-Width-Modulation (PWM) signal can be applied to the EN pin for LED dimming. The device operates at 1MHz fixed switching frequency to reduce output ripple, improve conversion efficiency, and allows using small external components. The WD3139 is available in TSOT-23-6L Package. Standard product is Pb-free and Halogen-free. Features  Input voltage range : 2.7~5.5V  Open LED Protection : 38V (Typ.)  Reference Voltage : 200mV (±5%)  Switching frequency : 1MHz (Typ.)  Efficiency : Up to 92%  Main switch current limit : 1.2A (Typ.)  PWM Dimming frequency : 5KHz to200KHz  PWM Dimming Duty Cycle : 0.5% ~ 100% Applications  Smart Phones  Tablets  Portable games TSOT-23-6L LX 1 GND 2 6...