LN2542 - Natlinear

LN2542 85~265V AC Input LED Constant Current Driver

The LN2542 is a high voltage buck control IC for constant LED current regulation. The LN2542 operates constant off-time mode. It allow efficient operation of High Brightness (HB) LEDs from voltage sources ranging from 8VDC up to 450VDC or 110VAC/220VAC. The LN2542 includes a PWM dimming input that can accept an external control signal with a duty ratio of 0 .

Features

 Switch mode constroller for single switch LED Drivers
 Open loop peak current controller
 Wide Input range from 8VDC~450VDC or 110VAC/220AC
 Application from a few mA to more than 1A output
 Up to hundreds of LEDs
 Constant off-time operation
 Linear and PWM dimming capability
 Requires few external components for operation
 Temperature compensation to regulate LED current
■ Package
 SOP-8 fuse AC220V IN4007
*4 10uF/400V IN4007 IN4007 IN4007 10uF/400V R1 10uF/16V HER207 LEDs 5mH LN2542 RNTC VIN DIM GATE 2N60 VREF CS R2 RNTC TOFF GND Rcs Rosc Note： 1、R1 is based o.