■ General Description

LN2544SF-G(44BA-201-C) is an open loop, current mode ， built-in

NMOSFET, control LED driver IC. The LN2544 operates

constant off-time mode. It allows efficient operation of High

Brightness (HB) LEDs from voltage sources ranging from

8VDC up to 100VDC.

The LN2544SF-G(44BA-201-C) includes a PWM dimming input that can

accept an external control signal with a duty ratio of 0 -

100% and a frequency of up to a few kilohertz, and the

dimming also accept a 0-1.2V linear input signal. The

RNTC pin can accept a 0-250mV Line Dimming input witch

be used for temperature compensation of the LED current.

LN2544SF-G(44BA-201-C) is available by SOP-8 packages.

■ Applications

 DC/DC LED driver applications

 RGB backlighting LED driver

 General purpose constant current source

 Signal and decorative LED lighting

■ Features

 Switch mode constroller for single switch LED Drivers

 Wide Input range from 8VDC~100VDC

 Open loop peak current controller

 Application from a few mA to more than 1A output

 Constant off-time operation

 Linear and PWM dimming capability

 Requires few external components for operation

 Temperature compensation to regulate LED current

■ Package

 ESOP8

■ Typical Application Circuit

■ Ordering Information

LN2544 ①②-③

■ Marking Rule

 44BA-201-C

 ESOP8