LR256 Datasheet (LRC) - White LED Step-Up Converter

LR256, White LED Step-Up Converter

Symbol Description Symbol 5 1：Switch 4 5：Supply SW Voltage VIN 2：GND GND 3：Feedback FB 4：Start-Up CE 1/8 Block Diagram LESHAN RADIO COMPANY, LTD.

LR256 PIN1(SW) PWM CONTROL Fosc CURRENT SENSE + SLOPE COMP + 2 1 0 0 PIN5(Vin) 2 VREF 21 1 + gm 2 11 2 PIN2(GND) D256 PIN4 S

LESHAN RADIO COMPANY, LTD.

LR256 White LED Step-Up Converter LR256 is a step-up DC/DC converter specifically designed to drive white LED with a constant current.

It can drive two,three,or four LEDS.

It switches at 1.2MHz and use tiny external components.

The output capacitor can be as small as 0.22uF,which can save space and cost versus alternative solutions.

Feedback ¾ Fast 1.2MHz Switching Frequency ¾ Requires Only 0.22uF Output Capacitor ¾ Inherently Matched LED Current ¾ High Efficiency: